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Journal articles

Academic literature on the topic 'Operoni'

Author: Grafiati

Published: 10 March 2023

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Journal articles on the topic "Operoni"

1

Nguyen, Huy N., Ashish Jain, Oliver Eulenstein, and Iddo Friedberg. "Tracing the ancestry of operons in bacteria." Bioinformatics 35, no. 17 (2019): 2998–3004. http://dx.doi.org/10.1093/bioinformatics/btz053.

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Abstract Motivation Complexity is a fundamental attribute of life. Complex systems are made of parts that together perform functions that a single component, or subsets of components, cannot. Examples of complex molecular systems include protein structures such as the F1Fo-ATPase, the ribosome, or the flagellar motor: each one of these structures requires most or all of its components to function properly. Given the ubiquity of complex systems in the biosphere, understanding the evolution of complexity is central to biology. At the molecular level, operons are classic examples of a complex sys

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2

Brandis, Gerrit, Sha Cao, and Diarmaid Hughes. "Operon Concatenation Is an Ancient Feature That Restricts the Potential to Rearrange Bacterial Chromosomes." Molecular Biology and Evolution 36, no. 9 (2019): 1990–2000. http://dx.doi.org/10.1093/molbev/msz129.

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Abstract The last common ancestor of the Gammaproteobacteria carried an important 40-kb chromosome section encoding 51 proteins of the transcriptional and translational machinery. These genes were organized into eight contiguous operons (rrnB-tufB-secE-rpoBC-str-S10-spc-alpha). Over 2 Gy of evolution, in different lineages, some of the operons became separated by multigene insertions. Surprisingly, in many Enterobacteriaceae, much of the ancient organization is conserved, indicating a strong selective force on the operons to remain colinear. Here, we show for one operon pair, tufB-secE in Salm

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3

Ming, Li, and Anna Boiko. "Recipes of the Russian opera tradition in the Chinese opera art of the 20th century." OOO "Zhurnal "Voprosy Istorii" 2020, no. 11-1 (2020): 170–78. http://dx.doi.org/10.31166/voprosyistorii202011statyi07.

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The publication is devoted to the consideration of the peculiarities of the reception of Russian opera tradition in the Chinese opera of 20th century. The significant role of the historical and the cultural events that affected the spread Russian opera in China is analyzed. Particular attention is paid to the study of the activities of representatives the Russian emigration in the field of opera art. It was emphasized that the influence of Russian and foreign opera contributed to the formation of the genre the Chinese opera of the European type.

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4

Acinas, Silvia G., Luisa A. Marcelino, Vanja Klepac-Ceraj, and Martin F. Polz. "Divergence and Redundancy of 16S rRNA Sequences in Genomes with Multiple rrn Operons." Journal of Bacteriology 186, no. 9 (2004): 2629–35. http://dx.doi.org/10.1128/jb.186.9.2629-2635.2004.

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ABSTRACT The level of sequence heterogeneity among rrn operons within genomes determines the accuracy of diversity estimation by 16S rRNA-based methods. Furthermore, the occurrence of widespread horizontal gene transfer (HGT) between distantly related rrn operons casts doubt on reconstructions of phylogenetic relationships. For this study, patterns of distribution of rrn copy numbers, interoperonic divergence, and redundancy of 16S rRNA sequences were evaluated. Bacterial genomes display up to 15 operons and operon numbers up to 7 are commonly found, but ∼40% of the organisms analyzed have eit

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5

Yap, Wai Ho, Zhenshui Zhang, and Yue Wang. "Distinct Types of rRNA Operons Exist in the Genome of the Actinomycete Thermomonospora chromogena and Evidence for Horizontal Transfer of an Entire rRNA Operon." Journal of Bacteriology 181, no. 17 (1999): 5201–9. http://dx.doi.org/10.1128/jb.181.17.5201-5209.1999.

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ABSTRACT We describe here the presence of two distinct types of rRNA operons in the genome of a thermophilic actinomycete Thermomonospora chromogena. The genome of T. chromogena contains six rRNA operons (rrn), of which four complete and two incomplete ones were cloned and sequenced. Comparative analysis revealed that the operon rrnB exhibits high levels of sequence variations to the other five nearly identical ones throughout the entire length of the operon. The coding sequences for the 16S and 23S rRNA genes differ by approximately 6 and 10%, respectively, between the two types of operons. N

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6

Dennis, Patrick P., Sonia Ziesche, and Shanthini Mylvaganam. "Transcription Analysis of Two Disparate rRNA Operons in the Halophilic Archaeon Haloarcula marismortui." Journal of Bacteriology 180, no. 18 (1998): 4804–13. http://dx.doi.org/10.1128/jb.180.18.4804-4813.1998.

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ABSTRACT The genome of the halophilic archaeon Haloarcula marismortui contains two rRNA operons designated rrnAand rrnB. Genomic clones of the two operons and their flanking regions have been sequenced, and primary transcripts and processing intermediates derived from each operon have been characterized. The 16S, 23S, and 5S genes from the two operons were found to differ at 74 of 1,472 positions, 39 of 2,922 positions, and 2 of 122 positions, respectively. This degree of sequence divergence for multicopy (paralogous) rRNA genes was 10- to 50-fold or more higher than anticipated. The two opero

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7

Reksoprawiro, Ricky, Gabriella Scarlett, Alexander Joseph Ibnu Wibowo, and Novi Amelia. "Consumer Culture Theory: Hubungan Timbal Balik antar Social Operant Resources dan Operand Resources dalam Studi Empiris McDonald’s Indonesia." Kajian Branding Indonesia 2, no. 1 (2020): 132–61. http://dx.doi.org/10.21632/kbi.2.1.132-161.

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Penelitian ini bertujuan untuk menguji secara empiris secara garis besar untuk mengetahui hubungan antara konsep social operant resources terhadap operand resources yang dilandasi oleh consumer culture theory. Secara spesifik, studi ini ingin menguji sebagai berikut: (i) pengaruh social operant resources terhadap economic operand resources; (ii) pengaruh social operant resources terhadap material operand resources; (iii) pengaruh economic operand resources terhadap social operant resources; dan (iv) pengaruh material operand resources terhadap social operant resources; (v) hubungan timbal bali

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8

Menendez, M. C., M. J. Garcia, M. C. Navarro, et al. "Characterization of an rRNA Operon (rrnB) of Mycobacterium fortuitum and Other Mycobacterial Species: Implications for the Classification of Mycobacteria." Journal of Bacteriology 184, no. 4 (2002): 1078–88. http://dx.doi.org/10.1128/jb.184.4.1078-1088.2002.

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ABSTRACT Mycobacteria are thought to have either one or two rRNA operons per genome. All mycobacteria investigated to date have an operon, designated rrnA, located downstream from the murA gene. We report that Mycobacteriun fortuitum has a second rrn operon, designated rrnB, which is located downstream from the tyrS gene; tyrS is very close to the 3" end of a gene (3-mag) coding for 3-methylpurine-DNA-glycosylase. The second rrn operon of Mycobacterium smegmatis was shown to have a similar organization, namely, 5" 3-mag-tyrS-rrnB 3". The rrnB operon of M. fortuitum was found to have a single d

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9

Asai, Tsuneaki, Ciarán Condon, Justina Voulgaris, et al. "Construction and Initial Characterization of Escherichia coli Strains with Few or No Intact Chromosomal rRNA Operons." Journal of Bacteriology 181, no. 12 (1999): 3803–9. http://dx.doi.org/10.1128/jb.181.12.3803-3809.1999.

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ABSTRACT The Escherichia coli genome carries seven rRNA (rrn) operons, each containing three rRNA genes. The presence of multiple operons has been an obstacle to many studies of rRNA because the effect of mutations in one operon is diluted by the six remaining wild-type copies. To create a tool useful for manipulating rRNA, we sequentially inactivated from one to all seven of these operons with deletions spanning the 16S and 23S rRNA genes. In the final strain, carrying no intact rRNA operon on the chromosome, rRNA molecules were expressed from a multicopy plasmid containing a single rRNA oper

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10

Lakhova, Tatiana N., Fedor V. Kazantsev, Aleksey M. Mukhin, Nikolay A. Kolchanov, Yury G. Matushkin, and Sergey A. Lashin. "Algorithm for the Reconstruction of Mathematical Frame Models of Bacterial Transcription Regulation." Mathematics 10, no. 23 (2022): 4480. http://dx.doi.org/10.3390/math10234480.

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Transcription regulation plays an important role in bacterial activity. The operon concept coined by François Jacob and Jacques Monod has had a considerable effect on investigations into gene expression regulation, including modeling. However, most such studies have considered the regulation models devised manually for one or several operons. For that reason, the objective of the present study was automated genome model reconstruction for different bacteria. The suggested algorithm accounted for all possible interactions of transcription factors and their binding sites in an operon’s promoter

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