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Journal articles on the topic 'Bas1'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Devlin, C., K. Tice-Baldwin, D. Shore, and K. T. Arndt. "RAP1 is required for BAS1/BAS2- and GCN4-dependent transcription of the yeast HIS4 gene." Molecular and Cellular Biology 11, no. 7 (1991): 3642–51. http://dx.doi.org/10.1128/mcb.11.7.3642.

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The major in vitro binding activity to the Saccharomyces cerevisiae HIS4 promoter is due to the RAP1 protein. In the absence of GCN4, BAS1, and BAS2, the RAP1 protein binds to the HIS4 promoter in vivo but cannot efficiently stimulate HIS4 transcription. RAP1, which binds adjacently to BAS2 on the HIS4 promoter, is required for BAS1/BAS2-dependent activation of HIS4 basal-level transcription. In addition, the RAP1-binding site overlaps with the single high-affinity HIS4 GCN4-binding site. Even though RAP1 and GCN4 bind competitively in vitro, RAP1 is required in vivo for (i) the normal steady-state levels of GCN4-dependent HIS4 transcription under nonstarvation conditions and (ii) the rapid increase in GCN4-dependent steady-state HIS4 mRNA levels following amino acid starvation. The presence of the RAP1-binding site in the HIS4 promoter causes a dramatic increase in the micrococcal nuclease sensitivity of two adjacent regions within HIS4 chromatin: one region contains the high-affinity GCN4-binding site, and the other region contains the BAS1- and BAS2-binding sites. These results suggest that RAP1 functions at HIS4 by increasing the accessibility of GCN4, BAS1, and BAS2 to their respective binding sites when these sites are present within chromatin.

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2

Devlin, C., K. Tice-Baldwin, D. Shore, and K. T. Arndt. "RAP1 is required for BAS1/BAS2- and GCN4-dependent transcription of the yeast HIS4 gene." Molecular and Cellular Biology 11, no. 7 (1991): 3642–51. http://dx.doi.org/10.1128/mcb.11.7.3642-3651.1991.

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The major in vitro binding activity to the Saccharomyces cerevisiae HIS4 promoter is due to the RAP1 protein. In the absence of GCN4, BAS1, and BAS2, the RAP1 protein binds to the HIS4 promoter in vivo but cannot efficiently stimulate HIS4 transcription. RAP1, which binds adjacently to BAS2 on the HIS4 promoter, is required for BAS1/BAS2-dependent activation of HIS4 basal-level transcription. In addition, the RAP1-binding site overlaps with the single high-affinity HIS4 GCN4-binding site. Even though RAP1 and GCN4 bind competitively in vitro, RAP1 is required in vivo for (i) the normal steady-state levels of GCN4-dependent HIS4 transcription under nonstarvation conditions and (ii) the rapid increase in GCN4-dependent steady-state HIS4 mRNA levels following amino acid starvation. The presence of the RAP1-binding site in the HIS4 promoter causes a dramatic increase in the micrococcal nuclease sensitivity of two adjacent regions within HIS4 chromatin: one region contains the high-affinity GCN4-binding site, and the other region contains the BAS1- and BAS2-binding sites. These results suggest that RAP1 functions at HIS4 by increasing the accessibility of GCN4, BAS1, and BAS2 to their respective binding sites when these sites are present within chromatin.

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3

Som, Indrani, Rebecca N. Mitsch, Jennifer L. Urbanowski, and Ronda J. Rolfes. "DNA-Bound Bas1 Recruits Pho2 To Activate ADE Genes in Saccharomyces cerevisiae." Eukaryotic Cell 4, no. 10 (2005): 1725–35. http://dx.doi.org/10.1128/ec.4.10.1725-1735.2005.

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ABSTRACT Expression of the genes in the ADE regulon of Saccharomyces cerevisiae is repressed by the presence of purine bases in the extracellular medium and derepressed when cells are grown in the absence of purines. Derepression requires the transcriptional activators Bas1 and Pho2, as well as the biosynthetic intermediates 5′-phosphoribosyl-4-succinocarboxamide-5-aminoimidazole (SAICAR) and 5′-phosphoribosyl-4-carboxamide- 5-aminoimidazole (AICAR). In this study, we investigated if nuclear localization and binding to promoter DNA by the activators are regulated by purines. Using indirect immunofluorescence, we found that Bas1 is localized to the nucleus under both repressing and derepressing conditions. Importantly, we detected Bas1 bound to promoter DNA under both conditions using chromatin immunoprecipitation assays at several ADE promoters (ADE1, ADE2, ADE4, and ADE5,7) and HIS4. We analyzed the binding of Bas1 to wild-type and mutant sequences of the ADE5,7 promoters in vivo, and found that Bas1 binds independently to each of its two binding sites. Pho2 was not required for the association of Bas1 with chromosomal DNA, but it was required for an increase in Bas1-immunoprecipitated DNA. The presence of Pho2 at promoters was dependent on Bas1 and occurred only under derepressing conditions when the ADE genes are transcribed at elevated levels. We propose a model for regulation of the ADE genes in which DNA-bound Bas1 is inactive due to masking of its activation domain and Pho2 binds poorly to promoters when cells have sufficient purine nucleotides. Upon limitation for purines, the SAICAR/AICAR regulatory signal is transmitted to the nucleus to increase Bas1 and Pho2 interaction, recruiting Pho2 to promoters and freeing the activation domains for transactivation.

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4

Koehler, Rebecca N., Nicole Rachfall, and Ronda J. Rolfes. "Activation of the ADE Genes Requires the Chromatin Remodeling Complexes SAGA and SWI/SNF." Eukaryotic Cell 6, no. 8 (2007): 1474–85. http://dx.doi.org/10.1128/ec.00068-07.

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ABSTRACT The activation of the ADE regulon genes requires the pair of transcription factors Bas1 and Pho2. In a genome-wide screen for additional regulators of the pathway, strains with mutations in multiple subunits of the chromatin remodeling complexes SAGA and SWI/SNF were uncovered. These mutants exhibited decreased expression of an ADE5,7-lacZ reporter and native ADE compared to the wild-type strains, but the expression of the BAS1 and PHO2 genes was not substantially decreased. An unregulated Bas1-Pho2 fusion protein depended upon SAGA and SWI/SNF activity to promote transcription of a reporter. A significant but low-level association of Gcn5-myc and Snf2-myc with the ADE5,7 promoter was independent of adenine growth conditions and independent of the presence of the activator proteins Bas1 and Pho2. However, the increase in occupancy of Bas1 and Pho2 at ADE5,7 depended on both SAGA and SWI/SNF. The loss of catalytic activity of both SAGA and SWI/SNF complexes in the gcn5Δ snf2Δ double mutant was severely detrimental to ADE-lacZ reporter expression and native ADE gene expression, indicating complementary roles for these complexes. We conclude that Bas1 and Pho2 do not recruit the SAGA and SWI/SNF complexes to the ADE5,7 promoter but that the remodeling complexes are necessary to increase the binding of Bas1 and Pho2 in response to the adenine regulatory signal. Our data support the model that the SAGA and SWI/SNF complexes engage in global surveillance that is necessary for the specific response by Bas1 and Pho2.

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5

Mieczkowski, Piotr A., Margaret Dominska, Michael J. Buck, Jennifer L. Gerton, Jason D. Lieb, and Thomas D. Petes. "Global Analysis of the Relationship between the Binding of the Bas1p Transcription Factor and Meiosis-Specific Double-Strand DNA Breaks in Saccharomyces cerevisiae." Molecular and Cellular Biology 26, no. 3 (2006): 1014–27. http://dx.doi.org/10.1128/mcb.26.3.1014-1027.2006.

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ABSTRACT In the yeast Saccharomyces cerevisiae, certain genomic regions have very high levels of meiotic recombination (hot spots). The hot spot activity associated with the HIS4 gene requires the Bas1p transcription factor. To determine whether this relationship between transcription factor binding and hot spot activity is general, we used DNA microarrays to map all genomic Bas1p binding sites and to map the frequency of meiosis-specific double-strand DNA breaks (as an estimate of the recombination activity) of all genes in both wild-type and bas1 strains. We identified sites of Bas1p-DNA interactions upstream of 71 genes, many of which are involved in histidine and purine biosynthesis. Our analysis of recombination activity in wild-type and bas1 strains showed that the recombination activities of some genes with Bas1p binding sites were dependent on Bas1p (as observed for HIS4), whereas the activities of other genes with Bas1p binding sites were unaffected or were repressed by Bas1p. These data demonstrate that the effect of transcription factors on meiotic recombination activity is strongly context dependent. In wild-type and bas1 strains, meiotic recombination was strongly suppressed in large (25- to 150-kb) chromosomal regions near the telomeres and centromeres and in the region flanking the rRNA genes. These results argue that both local and regional factors affect the level of meiotic recombination.

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6

Peng, Hao, and Michael M. Neff. "CIRCADIAN CLOCK ASSOCIATED 1 and ATAF2 differentially suppress cytochrome P450-mediated brassinosteroid inactivation." Journal of Experimental Botany 71, no. 3 (2019): 970–85. http://dx.doi.org/10.1093/jxb/erz468.

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Abstract Brassinosteroids (BRs) are a group of steroid hormones regulating plant growth and development. Since BRs do not undergo transport among plant tissues, their metabolism is tightly regulated by transcription factors (TFs) and feedback loops. BAS1 (CYP734A1, formerly CYP72B1) and SOB7 (CYP72C1) are two BR-inactivating cytochrome P450s identified in Arabidopsis thaliana. We previously found that a TF ATAF2 (ANAC081) suppresses BAS1 and SOB7 expression by binding to the Evening Element (EE) and CIRCADIAN CLOCK ASSOCIATED 1 (CCA1)-binding site (CBS) on their promoters. Both the EE and CBS are known binding targets of the circadian regulatory protein CCA1. Here, we confirm that CCA1 binds the EE and CBS motifs on BAS1 and SOB7 promoters, respectively. Elevated accumulations of BAS1 and SOB7 transcripts in the CCA1 null mutant cca1-1 indicate that CCA1 is a repressor of their expression. When compared with either cca1-1 or the ATAF2 null mutant ataf2-2, the cca1-1 ataf2-2 double mutant shows higher SOB7 transcript accumulations and a stronger BR-insensitive phenotype of hypocotyl elongation in white light. CCA1 interacts with ATAF2 at both DNA–protein and protein–protein levels. ATAF2, BAS1, and SOB7 are all circadian regulated with distinct expression patterns. These results demonstrate that CCA1 and ATAF2 differentially suppress BAS1- and SOB7-mediated BR inactivation.

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7

Daignan-Fornier, B., and G. R. Fink. "Coregulation of purine and histidine biosynthesis by the transcriptional activators BAS1 and BAS2." Proceedings of the National Academy of Sciences 89, no. 15 (1992): 6746–50. http://dx.doi.org/10.1073/pnas.89.15.6746.

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8

Duparc, F. J., and D. F. Lunsingh Scheurleer. "Origine et administration des musées aux Pays-Bas1." Museum International (Edition Francaise) 15, no. 2 (2009): 70–78. http://dx.doi.org/10.1111/j.1755-5825.1962.tb01594.x.

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9

Tice-Baldwin, K., G. Fink, and K. Arndt. "BAS1 has a Myb motif and activates HIS4 transcription only in combination with BAS2." Science 246, no. 4932 (1989): 931–35. http://dx.doi.org/10.1126/science.2683089.

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10

Neff, M. M., S. M. Nguyen, E. J. Malancharuvil, et al. "BAS1: A gene regulating brassinosteroid levels and light responsiveness in Arabidopsis." Proceedings of the National Academy of Sciences 96, no. 26 (1999): 15316–23. http://dx.doi.org/10.1073/pnas.96.26.15316.

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11

Mateos, Laura, Alberto Jiménez, José L. Revuelta, and María A. Santos. "Purine Biosynthesis, Riboflavin Production, and Trophic-Phase Span Are Controlled by a Myb-Related Transcription Factor in the Fungus Ashbya gossypii." Applied and Environmental Microbiology 72, no. 7 (2006): 5052–60. http://dx.doi.org/10.1128/aem.00424-06.

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ABSTRACT Ashbya gossypii is a natural riboflavin overproducer used in the industrial production of the vitamin. We have isolated an insertional mutant exhibiting higher levels of riboflavin production than the wild type. DNA analysis of the targeted locus in the mutant strain revealed that a syntenic homolog of the Saccharomyces cerevisiae BAS1 gene, a member of the Myb family of transcription factors, was inactivated. Directed gene disruption of AgBAS1 confirmed the phenotype observed for the insertional mutant, and the Δbas1 mutant also showed auxotrophy for adenine and several growth defects, such as a delay in the germination of the spores and an abnormally prolonged trophic phase. Additionally, we demonstrate that the DNA-binding domain of AgBas1p is able to bind to the Bas1-binding motifs in the AgADE4 promoter; we also show a clear nuclear localization of a green fluorescent protein-Bas1 fusion protein. Real-time quantitative PCR analyses comparing the wild type and the Δbas1 mutant revealed that AgBAS1 was responsible for the adenine-mediated regulation of the purine and glycine pathways, since the transcription of the ADE4 and SHM2 genes was virtually abolished in the Δbas1 mutant. Furthermore, the transcription of ADE4 and SHM2 in the Δbas1 mutant did not diminish during the transition from the trophic to the productive phase did not diminish, in contrast to what occurred in the wild-type strain. A C-terminal deletion in the AgBAS1 gene, comprising a hypothetical regulatory domain, caused constitutive activation of the purine and glycine pathways, enhanced riboflavin overproduction, and prolonged the trophic phase. Taking these results together, we propose that in A. gossypii, AgBAS1 is an important transcription factor that is involved in the regulation of different physiological processes, such as purine and glycine biosynthesis, riboflavin overproduction, and growth.

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12

Liang, M. L., J. L. Yan, Y. Q. Yang, L. Liu, C. Y. Li, and J. Yang. "Construction of overexpression vectors of Magnaporthe oryzae genes BAS1 and BAS4 fusion to mCherry and screening of overexpression strains." Genetics and Molecular Research 14, no. 2 (2015): 7068–78. http://dx.doi.org/10.4238/2015.june.26.17.

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13

Bhoite, Leena T., Jason M. Allen, Emily Garcia, et al. "Mutations in the Pho2 (Bas2) Transcription Factor That Differentially Affect Activation with Its Partner Proteins Bas1, Pho4, and Swi5." Journal of Biological Chemistry 277, no. 40 (2002): 37612–18. http://dx.doi.org/10.1074/jbc.m206125200.

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14

Rolfes, Ronda J., Fan Zhang, and Alan G. Hinnebusch. "The Transcriptional Activators BAS1, BAS2, and ABF1 Bind Positive Regulatory Sites as the Critical Elements for Adenine Regulation ofADE5,7." Journal of Biological Chemistry 272, no. 20 (1997): 13343–54. http://dx.doi.org/10.1074/jbc.272.20.13343.

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15

Vyas, Paresh S., P. N. Gajjar, and Ashvin R. Jani. "Refractive Index of BAs_1-xP_x Semiconductors." Solid State Phenomena 209 (November 2013): 225–28. http://dx.doi.org/10.4028/www.scientific.net/ssp.209.225.

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Ternary alloys of group III-V semiconductors have important applications in fabrication of electro-optical devices. Their refractive index and related optical properties are of attractive interest in theoretical and experimental study. According to the Philips scale of iconicity, BP (fi =0.006) and BAs (fi =0.002) are the most covalent of the III-V semiconductors and there are interesting consequences of this property. We present a theoretical procedure for the study of refractive index of ternary alloy BAs1-xPx. The calculations are based on the pseudopotential formalism in which local potential coupled with the virtual crystal approximation (VCA) is applied to evaluate refractive index for the entire range of the alloy composition x of the ternary alloy BAs1-xPx. To incorporate screening effect, Nagy’s local field correction function has been employed. The screening functions of Hartree, Taylor, Ichimaru et al., Farid et al. and Sarkar et al. are also integrated for comparative study. Our results for parent compounds are compared to experiment and other available such theoretical findings and showed relatively good agreement. During present theoretical study it is concluded that refractive index fairly depends on the selection of the local field correction function.

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Meradji, H., S. Labidi, S. Ghemid, S. Drablia, and B. Bouhafs. "First principles calculations of structural, electronic and optical properties of BAs1−xPx alloy." Physics Procedia 2, no. 3 (2009): 933–40. http://dx.doi.org/10.1016/j.phpro.2009.11.046.

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Drablia, S., H. Meradji, S. Ghemid, S. Labidi, and B. Bouhafs. "First principles calculations of structural, electronic, thermodynamic and optical properties of BAs1 -xPxalloy." Physica Scripta 79, no. 4 (2009): 045002. http://dx.doi.org/10.1088/0031-8949/79/04/045002.

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18

Zhang, F., M. Kirouac, N. Zhu, A. G. Hinnebusch, and R. J. Rolfes. "Evidence that complex formation by Bas1p and Bas2p (Pho2p) unmasks the activation function of Bas1p in an adenine-repressible step of ADE gene transcription." Molecular and Cellular Biology 17, no. 6 (1997): 3272–83. http://dx.doi.org/10.1128/mcb.17.6.3272.

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Bas1p and Bas2p (Pho2p) are Myb-related and homeodomain DNA binding proteins, respectively, required for transcription of adenine biosynthetic genes in Saccharomyces cerevisiae. The repression of ADE genes in adenine-replete cells involves down-regulation of the functions of one or both of these activator proteins. A LexA-Bas2p fusion protein was found to activate transcription from a lexAop-lacZ reporter independently of both BAS1 function and the adenine levels in the medium. In contrast, a LexA-Bas1p fusion activated the lexAop reporter in a BAS2-dependent and adenine-regulated fashion. The DNA binding activity of Bas2p was not needed for its ability to support activation of the lexAop reporter by LexA-Bas1p, indicating that LexA-Bas1p recruits Bas2p to this promoter. The activation functions of both authentic Bas1p and LexA-Bas1p were stimulated under adenine-repressing conditions by overexpression of Bas2p, suggesting that complex formation by these proteins is inhibited in adenine-replete cells. Replacement of Asp-617 with Asn in Bas1p or LexA-Bas1p allowed either protein to activate transcription under repressing conditions in a manner fully dependent on Bas2p, suggesting that this mutation reduces the negative effect of adenine on complex formation by Bas1p and Bas2p. Deletions of N-terminal and C-terminal segments from the Bas1p moiety of LexA-Bas1p allowed high-level activation by the truncated proteins independently of Bas2p and adenine levels in the medium. From these results we propose that complex formation between Bas1p and Bas2p unmasks a latent activation function in Bas1p as a critical adenine-regulated step in transcription of the ADE genes.

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19

Turk, Edward M., Shozo Fujioka, Hideharu Seto, et al. "BAS1 and SOB7 act redundantly to modulate Arabidopsis photomorphogenesis via unique brassinosteroid inactivation mechanisms." Plant Journal 42, no. 1 (2005): 23–34. http://dx.doi.org/10.1111/j.1365-313x.2005.02358.x.

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20

Jinglu, Wu, Wang Hongdao, and Wang Sumin. "Pale0clim atlc estimate dur1ng the last 10000 years 1n eb1n ur la ke bas1 ．xlnjlang." Journal of Lake Sciences 5, no. 4 (1993): 299–306. http://dx.doi.org/10.18307/1993.0402.

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21

Youn, Ji-Hyun, Min Kyun Kim, Eun-Ji Kim, et al. "ARF7 increases the endogenous contents of castasterone through suppression of BAS1 expression in Arabidopsis thaliana." Phytochemistry 122 (February 2016): 34–44. http://dx.doi.org/10.1016/j.phytochem.2015.11.006.

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22

Bouhafs, B., and M. Ferhat. "Electronic structure theory of unusually matched BAs1-xPx alloys using high-throughput ab-initio computation." Physica B: Condensed Matter 579 (February 2020): 411901. http://dx.doi.org/10.1016/j.physb.2019.411901.

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23

Veys, Fanny Wonu. "Préserver pour la postérité : des anciens de l’ethnie bundjalung au musée national d’ethnologie des Pays-Bas1." Journal de la société des océanistes, no. 136-137 (October 15, 2013): 63–76. http://dx.doi.org/10.4000/jso.6919.

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24

Yang, Jing, Lin Liu, Yunfen Wang, et al. "Overexpression of BAS1 in rice blast fungus can promote blast fungus growth, sporulation and virulence in planta." Saudi Journal of Biological Sciences 24, no. 8 (2017): 1884–93. http://dx.doi.org/10.1016/j.sjbs.2017.11.032.

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25

Mosquera, Gloria, Martha C. Giraldo, Chang Hyun Khang, Sean Coughlan, and Barbara Valent. "Interaction Transcriptome Analysis Identifies Magnaporthe oryzae BAS1-4 as Biotrophy-Associated Secreted Proteins in Rice Blast Disease." Plant Cell 21, no. 4 (2009): 1273–90. http://dx.doi.org/10.1105/tpc.107.055228.

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26

Archambault, Jacques, David B. Jansma, Jean H. Kawasoe, Kim T. Arndt, Jack Greenblatt, and James D. Friesen. "Stimulation of Transcription by Mutations Affecting Conserved Regions of RNA Polymerase II." Journal of Bacteriology 180, no. 10 (1998): 2590–98. http://dx.doi.org/10.1128/jb.180.10.2590-2598.1998.

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ABSTRACT Mutations that increase the low-level transcription of theSaccharomyces cerevisiae HIS4 gene, which results from deletion of the genes encoding transcription factors BAS1, BAS2, and GCN4, were isolated previously in SIT1 (also known asRPO21, RPB1, and SUA8), the gene encoding the largest subunit of RNA polymerase II (RNAPII). Here we show that sit1 substitutions cluster in two conserved regions of the enzyme which form part of the active site. Sixsit1 mutations, affect region F, a region that is involved in transcriptional elongation and in resistance to α-aminatin. Foursit1 substitutions lie in another region involved in transcriptional elongation, region D, which binds Mg2+ ions essential for RNA catalysis. One region D substitution is lethal unless suppressed by a substitution in region G and interacts genetically withPPR2, the gene encoding transcription elongation factor IIS. Some sit1 substitutions affect the selection of transcriptional start sites at the CYC1 promoter in a manner reminiscent of that of sua8 (sua stands for suppression of upstream ATG) mutations. Together with previous findings which indicate that regions D and G are in close proximity to the 3′ end of the nascent transcript and that region F is involved in the translocation process, our results suggest that transcriptional activation by the sit1 mutations results from alteration of the RNAPII active center.

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Zhu, Xuan, and Scott Keeney. "High-Resolution Global Analysis of the Influences of Bas1 and Ino4 Transcription Factors on Meiotic DNA Break Distributions inSaccharomyces cerevisiae." Genetics 201, no. 2 (2015): 525–42. http://dx.doi.org/10.1534/genetics.115.178293.

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28

Yang, Jing, Yunfeng Wang, Lin Liu, et al. "Effects of exogenous salicylic acid and pH on pathogenicity of biotrophy-associated secreted protein 1 (BAS1)-overexpressing strain, Magnaporthe oryzae." Environmental Science and Pollution Research 26, no. 14 (2018): 13725–37. http://dx.doi.org/10.1007/s11356-018-2532-y.

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Han, Sang Jun, Young Chul Lee, Byung Soo Gim, et al. "Activator-Specific Requirement of Yeast Mediator Proteins for RNA Polymerase II Transcriptional Activation." Molecular and Cellular Biology 19, no. 2 (1999): 979–88. http://dx.doi.org/10.1128/mcb.19.2.979.

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ABSTRACT The multisubunit Mediator complex of Saccharomyces cerevisiae is required for most RNA polymerase II (Pol II) transcription. The Mediator complex is composed of two subcomplexes, the Rgr1 and Srb4 subcomplexes, which appear to function in the reception of activator signals and the subsequent modulation of Pol II activity, respectively. In order to determine the precise composition of the Mediator complex and to explore the specific role of each Mediator protein, our goal was to identify all of the Mediator components. To this end, we cloned three previously unidentified Mediator subunits, Med9/Cse2, Med10/Nut2, and Med11, and isolated mutant forms of each of them to analyze their transcriptional defects. Differential display and Northern analyses of mRNAs from wild-type and Mediator mutant cells demonstrated an activator-specific requirement for each Mediator subunit. Med9/Cse2 and Med10/Nut2 were required, respectively, for Bas1/Bas2- and Gcn4-mediated transcription of amino acid biosynthetic genes. Gal11 was required for Gal4- and Rap1-mediated transcriptional activation. Med11 was also required specifically for MFα1 transcription. On the other hand, Med6 was required for all of these transcriptional activation processes. These results suggest that distinct Mediator proteins in the Rgr1 subcomplex are required for activator-specific transcriptional activation and that the activation signals mediated by these Mediator proteins converge on Med6 (or the Srb4 subcomplex) to modulate Pol II activity.

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Høvring, I., A. Bostad, E. Ording, A. H. Myrset, and O. S. Gabrielsen. "DNA-binding domain and recognition sequence of the yeast BAS1 protein, a divergent member of the Myb family of transcription factors." Journal of Biological Chemistry 269, no. 26 (1994): 17663–69. http://dx.doi.org/10.1016/s0021-9258(17)32492-4.

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31

Todeschini, Anne-Laure, Antonin Morillon, Mathias Springer, and Pascale Lesage. "Severe Adenine Starvation Activates Ty1 Transcription and Retrotransposition in Saccharomyces cerevisiae." Molecular and Cellular Biology 25, no. 17 (2005): 7459–72. http://dx.doi.org/10.1128/mcb.25.17.7459-7472.2005.

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ABSTRACT Ty1 retrotransposons of the yeast Saccharomyces cerevisiae are activated by different kinds of stress. Here we show that Ty1 transcription is stimulated under severe adenine starvation conditions. The Bas1 transcriptional activator, responsible for the induction of genes of the de novo AMP biosynthesis pathway (ADE) in the absence of adenine, is not involved in this response. Activation occurs mainly on Ty1 elements, whose expression is normally repressed by chromatin and is suppressed in a hta1-htb1Δ mutant that alters chromatin structure. Activation is also abolished in a snf2Δ mutant. Several regions of the Ty1 promoter are necessary to achieve full activation, suggesting that full integrity of the promoter sequences might be important for activation. Together, these observations are consistent with a model in which the activation mechanism involves chromatin remodeling at Ty1 promoters. The consequence of Ty1 transcriptional activation in response to adenine starvation is an increase in Ty1 cDNA levels and a relief of Ty1 dormancy. The retrotransposition of four native Ty1 elements increases in proportion to their increase in transcription. Implications for the regulation of Ty1 mobility by changes in Ty1 mRNA levels are discussed.

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32

Luan, Jiayu, Jingxiang Dong, Xin Song, Jing Jiang, and Huiyu Li. "Overexpression of Tamarix hispida ThTrx5 Confers Salt Tolerance to Arabidopsis by Activating Stress Response Signals." International Journal of Molecular Sciences 21, no. 3 (2020): 1165. http://dx.doi.org/10.3390/ijms21031165.

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Salt stress inhibits normal plant growth and development by disrupting cellular water absorption and metabolism. Therefore, understanding plant salt tolerance mechanisms should provide a theoretical basis for developing salt-resistant varieties. Here, we cloned ThTrx5 from Tamarix hispida, a salt-resistant woody shrub, and generated ThTrx5-overexpressing transgenic Arabidopsis thaliana lines. Under NaCl stress, the germination rate of overexpressing ThTrx5 lines was significantly increased relative to that of the nontransgenic line; under salt stress, superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and glutathione levels and root length and fresh weight values of transgenic ThTrx5 plants were significantly greater than corresponding values for wild-type plants. Moreover, with regard to the transcriptome, comparison of differential gene expression of transgenic versus nontransgenic lines at 0 h and 3 h of salt stress exposure revealed 500 and 194 differentially expressed genes (DEGs), respectively, that were mainly functionally linked to catalytic activity and binding process. Pull-down experiments showed that ThTrx bound 2-Cys peroxiredoxin BAS1-like protein that influences stress response-associated redox, hormone signal transduction, and transcription factor functions. Therefore, this work provides important insights into ThTrx5 mechanisms that promote salt tolerance in plants.

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Broin, Mélanie, and Pascal Rey. "Potato Plants Lacking the CDSP32 Plastidic Thioredoxin Exhibit Overoxidation of the BAS1 2-Cysteine Peroxiredoxin and Increased Lipid Peroxidation in Thylakoids under Photooxidative Stress." Plant Physiology 132, no. 3 (2003): 1335–43. http://dx.doi.org/10.1104/pp.103.021626.

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Servant, Géraldine, Carole Pennetier, and Pascale Lesage. "Remodeling Yeast Gene Transcription by Activating the Ty1 Long Terminal Repeat Retrotransposon under Severe Adenine Deficiency." Molecular and Cellular Biology 28, no. 17 (2008): 5543–54. http://dx.doi.org/10.1128/mcb.00416-08.

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ABSTRACT The Ty1 long terminal repeat (LTR) retrotransposon of Saccharomyces cerevisiae is a powerful model to understand the activation of transposable elements by stress and their impact on genome expression. We previously discovered that Ty1 transcription is activated under conditions of severe adenine starvation. The mechanism of activation is independent of the Bas1 transcriptional activator of the de novo AMP biosynthesis pathway and probably involves chromatin remodeling at the Ty1 promoter. Here, we show that the 5′ LTR has a weak transcriptional activity and is sufficient for the activation by severe adenine starvation. Furthermore, we demonstrate that Ty1 insertions that bring Ty1 promoter sequences into the vicinity of a reporter gene confer adenine starvation regulation on it. We provide evidence that similar coactivation of genes adjacent to Ty1 sequences occurs naturally in the yeast genome, indicating that Ty1 insertions can mediate transcriptional control of yeast gene expression under conditions of severe adenine starvation. Finally, the transcription pattern of genes adjacent to Ty1 insertions suggests that severe adenine starvation facilitates the initiation of transcription at alternative sites, partly located in the 5′ LTR. We propose that Ty1-driven transcription of coding and noncoding sequences could regulate yeast gene expression in response to stress.

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Chen, R. H., and J. S. Lipsick. "Differential transcriptional activation by v-myb and c-myb in animal cells and Saccharomyces cerevisiae." Molecular and Cellular Biology 13, no. 7 (1993): 4423–31. http://dx.doi.org/10.1128/mcb.13.7.4423.

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The v-myb oncogene and its cellular homolog c-myb encode sequence-specific DNA-binding proteins which regulate transcription from promoters containing Myb-binding sites in animal cells. We have developed a Saccharomyces cerevisiae system to assay transcriptional activation by v-Myb and c-Myb. In yeast strains containing integrated reporter genes, activation was strictly dependent upon both the Myb DNA-binding domain and the Myb recognition element. BAS1, an endogenous Myb-related yeast protein, was not required for transactivation by animal Myb proteins and by itself had no detectable effect on a Myb reporter gene. Deletion analyses demonstrated that a domain of v-Myb C terminal to the previously mapped Myb transcriptional activation domain was required for transactivation in animal cells but not in S. cerevisiae. The same domain is also required for the efficient transformation of myeloid cells by v-Myb. In contrast to results in animal cells, in S. cerevisiae the full-length c-Myb was a much stronger transactivator than a protein bearing the oncogenic N- and C-terminal truncations of v-Myb. These results imply that negative regulation of c-Myb by its own termini requires an additional animal cell protein or small molecule that is not present in S. cerevisiae.

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Kong, Yiming, Zhe Meng, Hongfeng Wang, et al. "Brassinosteroid homeostasis is critical for the functionality of the Medicago truncatula pulvinus." Plant Physiology 185, no. 4 (2021): 1745–63. http://dx.doi.org/10.1093/plphys/kiab008.

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Abstract Many plant species open their leaves during the daytime and close them at night as if sleeping. This leaf movement is known as nyctinasty, a unique and intriguing phenomenon that been of great interest to scientists for centuries. Nyctinastic leaf movement occurs widely in leguminous plants, and is generated by a specialized motor organ, the pulvinus. Although a key determinant of pulvinus development, PETIOLULE-LIKE PULVINUS (PLP), has been identified, the molecular genetic basis for pulvinus function is largely unknown. Here, through an analysis of knockout mutants in barrelclover (Medicago truncatula), we showed that neither altering brassinosteroid (BR) content nor blocking BR signal perception affected pulvinus determination. However, BR homeostasis did influence nyctinastic leaf movement. BR activity in the pulvinus is regulated by a BR-inactivating gene PHYB ACTIVATION TAGGED SUPPRESSOR1 (BAS1), which is directly activated by PLP. A comparative analysis between M. truncatula and the non-pulvinus forming species Arabidopsis and tomato (Solanum lycopersicum) revealed that PLP may act as a factor that associates with unknown regulators in pulvinus determination in M. truncatula. Apart from exposing the involvement of BR in the functionality of the pulvinus, these results have provided insights into whether gene functions among species are general or specialized.

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Chen, R. H., and J. S. Lipsick. "Differential transcriptional activation by v-myb and c-myb in animal cells and Saccharomyces cerevisiae." Molecular and Cellular Biology 13, no. 7 (1993): 4423–31. http://dx.doi.org/10.1128/mcb.13.7.4423-4431.1993.

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The v-myb oncogene and its cellular homolog c-myb encode sequence-specific DNA-binding proteins which regulate transcription from promoters containing Myb-binding sites in animal cells. We have developed a Saccharomyces cerevisiae system to assay transcriptional activation by v-Myb and c-Myb. In yeast strains containing integrated reporter genes, activation was strictly dependent upon both the Myb DNA-binding domain and the Myb recognition element. BAS1, an endogenous Myb-related yeast protein, was not required for transactivation by animal Myb proteins and by itself had no detectable effect on a Myb reporter gene. Deletion analyses demonstrated that a domain of v-Myb C terminal to the previously mapped Myb transcriptional activation domain was required for transactivation in animal cells but not in S. cerevisiae. The same domain is also required for the efficient transformation of myeloid cells by v-Myb. In contrast to results in animal cells, in S. cerevisiae the full-length c-Myb was a much stronger transactivator than a protein bearing the oncogenic N- and C-terminal truncations of v-Myb. These results imply that negative regulation of c-Myb by its own termini requires an additional animal cell protein or small molecule that is not present in S. cerevisiae.

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Baier, Margarete, and Karl-Josef Dietz. "The plant 2-Cys peroxiredoxin BAS1 is a nuclear-encoded chloroplast protein: its expressional regulation, phylogenetic origin, and implications for its specific physiological function in plants." Plant Journal 12, no. 1 (1997): 179–90. http://dx.doi.org/10.1046/j.1365-313x.1997.12010179.x.

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Matzke, Courtney M., Joel S. Shore, Michael M. Neff, and Andrew G. McCubbin. "The Turnera Style S-Locus Gene TsBAHD Possesses Brassinosteroid-Inactivating Activity When Expressed in Arabidopsis thaliana." Plants 9, no. 11 (2020): 1566. http://dx.doi.org/10.3390/plants9111566.

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Heterostyly distinct hermaphroditic floral morphs enforce outbreeding. Morphs differ structurally, promote cross-pollination, and physiologically block self-fertilization. In Turnera the self-incompatibility (S)-locus controlling heterostyly possesses three genes specific to short-styled morph genomes. Only one gene, TsBAHD, is expressed in pistils and this has been hypothesized to possess brassinosteroid (BR)-inactivating activity. We tested this hypothesis using heterologous expression in Arabidopsis thaliana as a bioassay, thereby assessing growth phenotype, and the impacts on the expression of endogenous genes involved in BR homeostasis and seedling photomorphogenesis. Transgenic A. thaliana expressing TsBAHD displayed phenotypes typical of BR-deficient mutants, with phenotype severity dependent on TsBAHD expression level. BAS1, which encodes an enzyme involved in BR inactivation, was downregulated in TsBAHD-expressing lines. CPD and DWF, which encode enzymes involved in BR biosynthesis, were upregulated. Hypocotyl growth of TsBAHD dwarfs responded to application of brassinolide in light and dark in a manner typical of plants over-expressing genes encoding BR-inactivating activity. These results provide empirical support for the hypothesis that TsBAHD possesses BR-inactivating activity. Further this suggests that style length in Turnera is controlled by the same mechanism (BR inactivation) as that reported for Primula, but using a different class of enzyme. This reveals interesting convergent evolution in a biochemical mechanism to regulate floral form in heterostyly.

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KHALILI, Marouf, Mohammad Reza NAGHAVI, and Said YOUSEFZADEH. "Protein pattern analysis in tolerant and susceptible wheat cultivars under salinity stress conditions." Acta agriculturae Slovenica 111, no. 3 (2018): 545. http://dx.doi.org/10.14720/aas.2018.111.3.03.

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<p>To investigate proteome pattern of wheat cultivars, young leaves were collected from tillering stage of seedlings two weeks after development of the salinity stress. The extraction of proteins from leaf tissue was done and two dimensional electrophoresis using IPG strips and SDS-PAGE in the control and salinity treatments were performed. In total, 198 and 203 protein spots were identified in tolerant (‘Moghan3’) and susceptible (‘Pishtaz’) cultivars respectively. Also, among these, spots number 21 and 22 were detected with significant IF in ‘Moghan3’ and ‘Pishtaz’ respectively. Two-stage mass spectrometry (MS/MS) was used to identify protein spots. Common identified proteins, including proteins involved in removal of oxidants, Calvin cycle proteins, proteins involved in light reaction of photosynthesis and proton transfer, and heat shock protein were identified on basis of the functional groups and their frequency. In total, ‘Moghan3’ maintained the stability of the structure and performance of carbon metabolism under stress better than susceptible cultivar. In addition, defense against oxidative stress induced by salinity stress was performed by 2-cys peroxiredoxin BAS1 and Cu-Zn SOD proteins that tolerant cultivar defended against oxidative stress better than the susceptible cultivar. The greatest strength of ‘Moghan3’ and major weakness in ‘Pishtaz’ are relying on the unique proteins formed under salinity stress for the removal of oxidants and to maintain the activity of the photosynthetic light reactions, respectively.</p>

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Dudley, Aimée M., Lisa J. Gansheroff та Fred Winston. "Specific Components of the SAGA Complex Are Required for Gcn4- and Gcr1-Mediated Activation of the his4-912δ Promoter in Saccharomyces cerevisiae". Genetics 151, № 4 (1999): 1365–78. http://dx.doi.org/10.1093/genetics/151.4.1365.

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Abstract Mutations selected as suppressors of Ty or solo δ insertion mutations in Saccharomyces cerevisiae have identified several genes, SPT3, SPT7, SPT8, and SPT20, that encode components of the SAGA complex. However, the mechanism by which SAGA activates transcription of specific RNA polymerase II-dependent genes is unknown. We have conducted a fine-structure mutagenesis of one widely used SAGA-dependent promoter, the δ element of his4-912δ, to identify sequence elements important for its promoter activity. Our analysis has characterized three δ regions necessary for full promoter activity and accurate start site selection: an upstream activating sequence, a TATA region, and an initiator region. In addition, we have shown that factors present at the adjacent UASHIS4 (Gcn4, Bas1, and Pho2) also activate the δ promoter in his4-912δ. Our results suggest a model in which the δ promoter in his4-912δ is primarily activated by two factors: Gcr1 acting at the UASδ and Gcn4 acting at the UASHIS4. Finally, we tested whether activation by either of these factors is dependent on components of the SAGA complex. Our results demonstrate that Spt3 and Spt20 are required for full δ promoter activity, but that Gcn5, another member of SAGA, is not required. Spt3 appears to be partially required for activation of his4-912δ by both Gcr1 and Gcn4. Thus, our work suggests that SAGA exerts a large effect on δ promoter activity through a combination of smaller effects on multiple factors.

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Cheng, Xue, Andréanne Auger, Mohammed Altaf, et al. "Eaf1 Links the NuA4 Histone Acetyltransferase Complex to Htz1 Incorporation and Regulation of Purine Biosynthesis." Eukaryotic Cell 14, no. 6 (2015): 535–44. http://dx.doi.org/10.1128/ec.00004-15.

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ABSTRACT Proper modulation of promoter chromatin architecture is crucial for gene regulation in order to precisely and efficiently orchestrate various cellular activities. Previous studies have identified the stimulatory effect of the histone-modifying complex NuA4 on the incorporation of the histone variant H2A.Z (Htz1) at the PHO5 promoter (A. Auger, L. Galarneau, M. Altaf, A. Nourani, Y. Doyon, R. T. Utley, D. Cronier, S. Allard, and J. Côté, Mol Cell Biol 28:2257–2270, 2008, http://dx.doi.org/10.1128/MCB.01755-07 ). In vitro studies with a reconstituted system also indicated an intriguing cross talk between NuA4 and the H2A.Z-loading complex, SWR-C (M. Altaf, A. Auger, J. Monnet-Saksouk, J. Brodeur, S. Piquet, M. Cramet, N. Bouchard, N. Lacoste, R. T. Utley, L. Gaudreau, J. Côté, J Biol Chem 285:15966–15977, 2010, http://dx.doi.org/10.1074/jbc.M110.117069 ). In this work, we investigated the role of the NuA4 scaffold subunit Eaf1 in global gene expression and genome-wide incorporation of Htz1. We found that loss of Eaf1 affects Htz1 levels mostly at the promoters that are normally highly enriched in the histone variant. Analysis of eaf1 mutant cells by expression array unveiled a relationship between NuA4 and the gene network implicated in the purine biosynthesis pathway, as EAF1 deletion cripples induction of several ADE genes. NuA4 directly interacts with Bas1 activation domain, a key transcription factor of adenine genes. Chromatin immunoprecipitation (ChIP) experiments demonstrate that nucleosomes on the inactive ADE17 promoter are acetylated already by NuA4 and enriched in Htz1. Upon derepression, these poised nucleosomes respond rapidly to activate ADE gene expression in a mechanism likely reminiscent of the PHO5 promoter, leading to nucleosome disassembly. These detailed molecular events depict a specific case of cross talk between NuA4-dependent acetylation and incorporation of histone variant Htz1, presetting the chromatin structure over ADE promoters for subsequent chromatin remodeling and activated transcription.

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Seong, Eun Soo. "Expression Changes of Genes Related to Germination Based on EST Database under Priming Treatment by Gibberellic Acid in Perilla frutescens (Korean Perilla)." International Journal of Agriculture and Biology 26, no. 02 (2021): 251–56. http://dx.doi.org/10.17957/ijab/15.1831.

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It is very important to establish an optimal seed priming process in order to increase the vitality of the seeds and promote the metabolism for the germination of the seeds. The optimum concentrations and species of priming agents to improve seed germination of both medicinal plants were also estimated. To improve the germination rate of Perilla frutescens(Korean perilla) seeds, various seed priming agents were used to analyze seed germination rates in the Saeyeopsil, Okdong and 141 collection Korean perilla cultivars. The agents used for seed priming were CaCl2, Ca(NO3)2, NaCl, K3PO4, polyethylene glycol, and gibberellic acid (GA3). When 0.1 mMGA3was used for seed priming, germination rates of Okdong, and the 141 collection showed a greater than 70% increase compared to the controls. Nine genes were selected for expression analysis by searching for genes related to seed germination and plant development in the EST(Expressed Sequence Tag) database of the Korean perilla cDNA library. GA3priming treatment for 1 d induced higher transcriptional levels of genes related to germination and plant developmentthan controls treated with water only. These genes were identified as protochlorophyllide reductase-like, magnesium-chelatase subunit ChlI, heme-binding protein 2-like, glyceraldehyde 3-phosphate dehydrogenase A, Chlorophyll a-b binding protein 6, B2 protein, 2-Cys peroxiredoxin BAS1, and 21 kDa protein. From these results, we suggest that when priming Korean perilla seeds with GA3, a large number of genes involved in plant development at early stages of seed germination play a role in improving the seed germination rate. Also, these induced genes are ideal candidate biomarkers for seed priming of Korean perilla. Specially, protochlorophyllide reductase-like is thought to be a potential gene for future molecular marker.© 2021 Friends Science Publishers

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Andry Anita Dewi, Ni Made, and Ni Luh Putu Ari Sulatri. "Penggunaan Ungkapan Basa Basi dalam Bahasa Jepang." Pustaka : Jurnal Ilmu-Ilmu Budaya 18, no. 1 (2018): 30. http://dx.doi.org/10.24843/pjiib.2018.v18.i01.p05.

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Japanese society in everyday life cannot be separated from relations of communication between members of the community itselft. Based on the phenomenon of the society, it can be ascertained that courtesy is the most important thing in it. For that reason, the Japanese society functioning courtesy to achieve a good and communicative speech. The purpose of this study is to describe and analyze the functions of courtesy attached that contained in Japanese speech based on the theory of functions proposed by Leech. The data used in this study is novel titled Beautiful Life by Eriko Kitagawa. Some functions of courtesy such inhibitions were found in this study is to express a greeting, excited feelings, prise and offering something.

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Baschiera, Stefano, and Elena Caoduro. "Retro, faux-vintage, and anachronism: When cinema looks back." NECSUS. European Journal of Media Studies 4, no. 2 (2015): 143–63. http://dx.doi.org/10.5117/necsus2015.2.basc.

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Bastiaanse, Roelien, and Hans Bennis. "Productie en begrip van voorzetsels bij sprekers met agrammatische en vloeiende afasie." Nederlandse Taalkunde 23, no. 1 (2018): 3–22. http://dx.doi.org/10.5117/nedtaa2018.1.bast.

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Cardoso, Ricardo. "O processo decisório em um ambiente de informação contábil: Um estudo usando a teoria dos prospectos." Revista de Administração e Contabilidade da Unisinos 5, no. 2 (2008): 85–95. http://dx.doi.org/10.4013/base.20082.01.

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Lopes, Fernando. "Parceria no agronegócio da carcinicultura na perspectiva da imersão estrutural – o caso da Camanor Produtos Marinhos Ltda." Revista de Administração e Contabilidade da Unisinos 5, no. 2 (2008): 96–108. http://dx.doi.org/10.4013/base.20082.02.

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Correia, Laise. "O efeito da liquidez sobre a rentabilidade de mercado das ações negociadas no mercado acionário brasileiro." Revista de Administração e Contabilidade da Unisinos 5, no. 2 (2008): 109–19. http://dx.doi.org/10.4013/base.20082.03.

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Coelho, Antonio Carlos. "Funções informacionais de apropriações contábeis pelo regime de competência." Revista de Administração e Contabilidade da Unisinos 5, no. 2 (2008): 120–30. http://dx.doi.org/10.4013/base.20082.04.

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