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Articoli di riviste sul tema "Archaebacteria"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 febbraio 2023

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1

Cammarano, P., O. Tiboni, and A. M. Sanangelantoni. "Phylogenetic conservation of antigenic determinants in archaebacterial elongation factors (Tu proteins)." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 2–10. http://dx.doi.org/10.1139/m89-002.

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By using affinity chromatography methods, we have purified elongation factor Tu (EF-Tu) proteins from a host of archaebacteria covering all known divisions in the archaebacterial tree except halophiles, and from such distantly related eubacteria as Thermotoga maritima and Escherichia coli. Polyclonal antibodies were raised against the Tu proteins of Sulfolobus solfataricus, Thermoproteus tenax, Thermococcus celer, Pyrococcus wosei, Archaeoglobus fulgidus, Methanococcus thermolitotrophicus, Thermoplasma acidophilum, and Thermotoga and used to probe the immunochemical relatedness of elongation f

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2

Fedorov, Oleg V., Michael G. Pyatibratov, Alla S. Kostyukova, Natalja K. Osina, and Valery Yu Tarasov. "Protofilament as a structural element of flagella of haloalkalophilic archaebacteria." Canadian Journal of Microbiology 40, no. 1 (January 1, 1994): 45–53. http://dx.doi.org/10.1139/m94-007.

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Flagella of the haloalkalophilic archaebacterium Natronobacterium magadii were purified and characterized. The diameter of the flagella was 10 nm. It was shown that the flagella consist of four major proteins with molecular weights of 105 000, 60 000, 59 000, and 45 000. With decreasing NaCl concentration, the flagella dissociated into protofilaments. The structure of dissociated flagella and individual flagellins was studied by limited proteolysis. It was found that proteolytic cleavage of flagellins in dissociated flagella into high molecular weight fragments (about 40 000) did not lead to p

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3

Amils, R., L. Ramírez, J. L. Sanz, I. Marín, A. G. Pisabarro, and D. Ureña. "The use of functional analysis of the ribosome as a tool to determine archaebacterial phylogeny." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 141–47. http://dx.doi.org/10.1139/m89-021.

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Forty different antibiotics with diverse kingdom and functional specificities were used to measure the functional characteristics of the archaebacterial translation apparatus. The resulting inhibitory curves, which are characteristic of the cell-free system analyzed, were transformed into quantitative values that were used to cluster the different archaebacteria analyzed. This cluster resembles the phylogenetic tree generated by 16S rRNA sequence comparisons. These results strongly suggest that functional analysis of an appropriate evolutionary clock, such as the ribosome, is of intrinsic phyl

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4

Olsen, Gary J., and Carl R. Woese. "A brief note concerning archaebacterial phylogeny." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 119–23. http://dx.doi.org/10.1139/m89-018.

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Critical analysis of the recently proposed alternative to the normal archaebacterial tree, the new eocyte tree, shows that the latter's central topology, in which the eubacteria branch from an entirely different section of the unrooted archaebacterial tree than the eukaryotes, is consistent with an artifact. The effects of the alignment used and the particular composition of the sequence quartets analyzed to infer this tree are discussed in detail.Key words: archaebacteria, molecular phylogeny, 16S ribosomal RNA, evolution, eocyte tree.

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5

Wolters, Jörn, and Volker A. Erdmann. "The structure and evolution of archaebacterial ribosomal RNAs." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 43–51. http://dx.doi.org/10.1139/m89-007.

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A cladistic analysis of 553 5S rRNA sequences has revealed a Ur-5S rRNA, the ancestor of all present-day 5S rRNA molecules. Previously stated characteristic differences between the eubacterial and eukaryotic molecules, namely, the length base-pairing schemes of helices D, can be used as a marker for the various archaebacterial branches. One model comprises Thermococcus, Thermoplasma, methanobacteria, and halobacteria; a second comprises the Sulfolobales; and a third is represented only by the single organism Octopus Spring species 1. A relaxed selection pressure on helix E with subsequent dele

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6

Ramirez, Celia, Lawrence C. Shimmin, C. Hunter Newton, Alastair T. Matheson, and Patrick P. Dennis. "Structure and evolution of the L11, L1, L10, and L12 equivalent ribosomal proteins in eubacteria, archaebacteria, and eucaryotes." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 234–44. http://dx.doi.org/10.1139/m89-036.

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The genes corresponding to the L11, L1, L10, and L12 equivalent ribosomal proteins (L11e, L1e, L10e, and L12e) of Escherichia coli have been cloned and sequenced from two widely divergent species of archaebacteria, Halobacterium cutirubrum and Sulfolobus solfataricus, and the L10 and four different L12 genes have been cloned and sequenced from the eucaryote Saccharomyces cerevisiae. Alignments between the deduced amino acid sequences of these proteins and to other available homologous proteins of eubacteria and eucaryotes have been made. The data suggest that the archaebacteria are a distinct

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7

Hensel, Reinhard, Peter Zwickl, Stefan Fabry, Jutta Lang, and Peter Palm. "Sequence comparison of glyceraldehyde-3-phosphate dehydrogenases from the three urkingdoms: evolutionary implication." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 81–85. http://dx.doi.org/10.1139/m89-012.

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The primary structure of the glyceraldehyde-3-phosphate dehydrogenase from the archaebacteria shows striking deviation from the known sequences of eubacterial and eukaryotic sequences, despite unequivocal homologies in functionally important regions. Thus, the structural similarity between the eubacterial and eukaryotic enzymes is significantly higher than that between the archaebacterial enzymes and the eubacterial and eukarytic enzymes. This preferred similarity of eubacterial and eukaryotic glyceraldehyde-3-phosphate dehydrogenase structures does not correspond to the phylogenetic distances

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8

Akanni, Wasiu A., Karen Siu-Ting, Christopher J. Creevey, James O. McInerney, Mark Wilkinson, Peter G. Foster, and Davide Pisani. "Horizontal gene flow from Eubacteria to Archaebacteria and what it means for our understanding of eukaryogenesis." Philosophical Transactions of the Royal Society B: Biological Sciences 370, no. 1678 (September 26, 2015): 20140337. http://dx.doi.org/10.1098/rstb.2014.0337.

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The origin of the eukaryotic cell is considered one of the major evolutionary transitions in the history of life. Current evidence strongly supports a scenario of eukaryotic origin in which two prokaryotes, an archaebacterial host and an α -proteobacterium (the free-living ancestor of the mitochondrion), entered a stable symbiotic relationship. The establishment of this relationship was associated with a process of chimerization, whereby a large number of genes from the α-proteobacterial symbiont were transferred to the host nucleus. A general framework allowing the conceptualization of eukary

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9

Zillig, Wolfram, Hans-Peter Klenk, Peter Palm, Gabriela Pühler, Felix Gropp, Roger A. Garrett, and Henrik Leffers. "The phylogenetic relations of DNA-dependent RNA polymerases of archaebacteria, eukaryotes, and eubacteria." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 73–80. http://dx.doi.org/10.1139/m89-011.

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Unrooted phylogenetic dendrograms were calculated by two independent methods, parsimony and distance matrix analysis, from an alignment of the derived amino acid sequences of the A and C subunits of the DNA-dependent RNA polymerases of the archaebacteria Sulfolobus acidocaldarius and Halobacterium halobium with 12 corresponding sequences including a further set of archaebacterial A + C subunits, eukaryotic nuclear RNA polymerases, pol I, pol II, and pol III, eubacterial β′ and chloroplast β′ and β″ subunits. They show the archaebacteria as a coherent group in close neighborhood of and sharing

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10

Fewson, Charles A. "Archaebacteria." Biochemical Education 14, no. 3 (July 1986): 103–15. http://dx.doi.org/10.1016/0307-4412(86)90167-6.

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11

Shimmin, Lawrence C., C. Hunter Newton, Celia Ramirez, Janet Yee, Willa Lee Downing, Andrea Louie, Alastair T. Matheson, and Patrick P. Dennis. "Organization of genes encoding the L11, L1, L10, and L12 equivalent ribosomal proteins in eubacteria, archaebacteria, and eucaryotes." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 164–70. http://dx.doi.org/10.1139/m89-025.

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Archaebacterial and eucaryotic cytoplasmic ribosomes contain proteins equivalent to the L11, L1, L10, and L12 proteins of the eubacterium Escherichia coli. In E. coli the genes encoding these ribosomal proteins are clustered, cotranscribed, and autogenously regulated at the level of mRNA translation. Genomic restriction fragments encoding the L11e, L1e, L10e, and L12e (equivalent) proteins from two divergent archaebacteria, Halobacterium cutirubrum and Sulfolobus solfataricus, and the L10e and L12e proteins from the eucaryote Saccharomyces cerevisiae have been cloned, sequenced, and analyzed.

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12

Forterre, Patrick, Christiane Eue, Mouldy Sioud, and Abdellah Hamal. "Studies on DNA polymerases and topoisomerases in archaebacteria." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 228–33. http://dx.doi.org/10.1139/m89-035.

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We have isolated DNA polymerases and topoisomerases from two thermoacidophilic archaebacteria: Sulfolobus acidocaldarius and Thermoplasma acidophilum. The DNA polymerases are composed of a single polypeptide with molecular masses of 100 and 85 kDa, respectively. Antibodies against Sulfolobus DNA polymerase did not cross react with Thermoplasma DNA polymerase. Whereas the major DNA topoisomerase activity in S. acidocaldarius is an ATP-dependent type I DNA topoisomerase with a reverse gyrase activity, the major DNA topoisomerase activity in T. acidophilum is a ATP-independent relaxing activity.

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13

Schopf, J. William. "Precambrian Prokaryotes and Stromatolites." Notes for a Short Course: Studies in Geology 18 (1987): 20–33. http://dx.doi.org/10.1017/s0271164800001482.

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In terms of biochemical and intracellular organization, living systems can be divided into two major “Superkingdoms,” eukaryotes and prokaryotes.Eukaryotes, comprising the more advanced and later evolving Superkingdom, include unicellular or multicellular organisms (viz., members of the Kingdoms Protista, Fungi, Plantae and Animalia) characterized by nucleus-, mitochondrion-, and (in plants and some protists) chloroplast-containing cells that are capable typically of mitotic cell division. Paleontologic evidence indicates that the eukaryotic cell originated during the Middle Proterozoic, proba

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14

Cavalier-Smith, Thomas, and Ema E.-Yung Chao. "Multidomain ribosomal protein trees and the planctobacterial origin of neomura (eukaryotes, archaebacteria)." Protoplasma 257, no. 3 (January 3, 2020): 621–753. http://dx.doi.org/10.1007/s00709-019-01442-7.

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AbstractPalaeontologically, eubacteria are > 3× older than neomura (eukaryotes, archaebacteria). Cell biology contrasts ancestral eubacterial murein peptidoglycan walls and derived neomuran N-linked glycoprotein coats/walls. Misinterpreting long stems connecting clade neomura to eubacteria on ribosomal sequence trees (plus misinterpreted protein paralogue trees) obscured this historical pattern. Universal multiprotein ribosomal protein (RP) trees, more accurate than rRNA trees, are taxonomically undersampled. To reduce contradictions with genically richer eukaryote trees and improve eubacte

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15

Fewson, Charles A. "Archaebacteria '85." Biochemical Education 16, no. 2 (April 1988): 117. http://dx.doi.org/10.1016/0307-4412(88)90104-5.

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16

Lake, James A., Ryan G. Skophammer, Craig W. Herbold, and Jacqueline A. Servin. "Genome beginnings: rooting the tree of life." Philosophical Transactions of the Royal Society B: Biological Sciences 364, no. 1527 (August 12, 2009): 2177–85. http://dx.doi.org/10.1098/rstb.2009.0035.

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A rooted tree of life provides a framework to answer central questions about the evolution of life. Here we review progress on rooting the tree of life and introduce a new root of life obtained through the analysis of indels, insertions and deletions, found within paralogous gene sets. Through the analysis of indels in eight paralogous gene sets, the root is localized to the branch between the clade consisting of the Actinobacteria and the double-membrane (Gram-negative) prokaryotes and one consisting of the archaebacteria and the firmicutes. This root provides a new perspective on the habitat

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17

Spiridonova, V. A., A. S. Akhmanova, V. K. Kagramanova, A. K. E. Köpke, and A. S. Mankin. "Ribosomal protein gene cluster of Halobacterium halobium: nucleotide sequence of the genes coding for S3 and L29 equivalent ribosomal proteins." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 153–59. http://dx.doi.org/10.1139/m89-023.

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A 1643 base pair fragment encoding the S3 and L29 equivalent ribosomal proteins has been sequenced from the archaebacterium Halobacterium halobium. The incomplete open reading frame present upstream from the S3 gene encodes a protein homologous to the eubacterial ribosomal protein L22. The initiation codons of the S3 and L29 genes overlap with the termination codons of the upstream genes. A tight physical organization suggests that these genes are transcribed as a polycistronic operon. Peculiarities of the protein structure and gene organization are discussed.Key words: archaebacteria, ribosom

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18

Thompson, Leo D., Larean D. Brandon, Daniel T. Nieuwlandt, and Charles J. Daniels. "Transfer RNA intron processing in the halophilic archaebacteria." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 36–42. http://dx.doi.org/10.1139/m89-006.

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An in vitro assay system has been developed for the Halobacterium volcanii tRNA intron endonuclease using in vitro generated precursor RNAs. A partially purified enzyme preparation is capable of precise and accurate excision of the intron from the halobacterial tRNATrp precursor. The cleavage reaction produces products having 5′ hydroxyl and 2′,3′ cyclic phosphate termini. Processing of precursor molecules containing deletions within the exon regions indicates that the halobacterial endonuclease does not require intact mature tRNA structure in the substrate; this is in contrast to the eukaryot

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19

Hackett, Neil R., and Shiladitya DasSarma. "Characterization of the small endogenous plasmid of Halobacterium strain SB3 and its use in transformation of H. halobium." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 86–91. http://dx.doi.org/10.1139/m89-013.

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To study the molecular biology of the halophilic archaebacterium Halobacterium halobium, the introduction of DNA engineered in vitro is desirable. As a first step in developing a cloning vector, the complete 1736 base pair nucleotide sequence of the natural, high copy number, Halobacterium plasmid pHSB1 has been determined. The plasmid was found to show homology to the small plasmids of Halobacterium strains GRB and GN101. Plasmid pHSB1 encodes a 317 amino acid protein of unknown function. The related halophile, H. halobium, could be transformed by pHSB1, demonstrating its utility as the basis

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20

Zhou, D., and R. H. White. "Transsulfuration in archaebacteria." Journal of Bacteriology 173, no. 10 (1991): 3250–51. http://dx.doi.org/10.1128/jb.173.10.3250-3251.1991.

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21

Cavalier-Smith, T. "Archaebacteria and Archezoa." Nature 339, no. 6220 (May 1989): 100–101. http://dx.doi.org/10.1038/339100a0.

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22

Nicolaus, Barbara, Agata Gambacorta, Anna Lisa Basso, Raffaele Riccio, Mario De Rosa, and William D. Grant. "Trehalose in Archaebacteria." Systematic and Applied Microbiology 10, no. 3 (August 1988): 215–17. http://dx.doi.org/10.1016/s0723-2020(88)80003-1.

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23

Martin, William, and Michael J. Russell. "On the origins of cells: a hypothesis for the evolutionary transitions from abiotic geochemistry to chemoautotrophic prokaryotes, and from prokaryotes to nucleated cells." Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 358, no. 1429 (January 29, 2003): 59–85. http://dx.doi.org/10.1098/rstb.2002.1183.

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All life is organized as cells. Physical compartmentation from the environment and self–organization of self–contained redox reactions are the most conserved attributes of living things, hence inorganic matter with such attributes would be life's most likely forebear. We propose that life evolved in structured iron monosulphide precipitates in a seepage site hydrothermal mound at a redox, pH and temperature gradient between sulphide–rich hydrothermal fluid and iron(II)–containing waters of the Hadean ocean floor. The naturally arising, three–dimensional compartmentation observed within fossili

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24

May, Bruce P., Patrick Tam, and Patrick P. Dennis. "The expression of the superoxide dismutase gene in Halobacterium cutirubrum and Halobacterium volcanii." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 171–75. http://dx.doi.org/10.1139/m89-026.

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The gene encoding the Mn-containing superoxide dismutase (SOD) from Halobacterium cutirubrum has been cloned and sequenced. The deduced amino acid sequence is homologous to the sequences of Fe and Mn SODs from eubacteria. The high degree of amino acid identity between the archaebacterial and eubacterial proteins suggests that a SOD gene may have been laterally transferred between eubacteria and archaebacteria sometime after the accumulation of atmospheric oxygen. Consensus elements of halobacterial promoters are found upstream of the coding region, however, the spacing between them and the tra

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25

Hidayah, Maulida Ulfa, Sonja V. T. Lumowa, and Didimus Tanah Boleng. "The needs analysis of archaebacteria and eubacteria web-based biology learning media." JPBIO (Jurnal Pendidikan Biologi) 5, no. 2 (November 29, 2020): 193–201. http://dx.doi.org/10.31932/jpbio.v5i2.727.

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The media used in learning archaebacteria and eubacteria are very varied, but there are still obstacles in the delivery of subject matter, so it is necessary that the formulation of media developed. The purpose of this research was to analyze the needs of developing web-based biology learning media on archaebacteria and eubacteria material for students of X-grade high school. The research sample was determined by a purposive sampling technique considering school status, conditions, school facilities, and students' characteristics. There are 3 samples of schools, namely 2 public schools and 1 p

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26

Martin, William. "Pathogenic archaebacteria: do they not exist because archaebacteria use different vitamins?" BioEssays 26, no. 5 (2004): 592–93. http://dx.doi.org/10.1002/bies.20044.

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27

Köpke, Andreas K. E., and Brigitte Wittmann-Liebold. "Comparative studies of ribosomal proteins and their genes from Methanococcus vannielii and other organisms." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 11–20. http://dx.doi.org/10.1139/m89-003.

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Using data from a partial protein sequence analysis of ribosomal proteins derived from the archaebacterium Methanococcus vannielii, oligonucleotide probes were synthesized. The probes enabled us to localize several ribosomal protein genes and to determine their nucleotide sequences. The amino acid sequences that were deduced from the genes correspond to proteins L12 and L10 from the rif operon, according to the genome organization in Escherichia coli, and to proteins L23 and L2, which have comparable locations, as in the Escherichia coli S10 operon. Various degrees of similarity were found whe

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28

ZILLIG, WOLFRAM. "Eukaryotic Traits in Archaebacteria." Annals of the New York Academy of Sciences 503, no. 1 Endocytobiolo (July 1987): 78–82. http://dx.doi.org/10.1111/j.1749-6632.1987.tb40599.x.

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29

Walker, Richard T. "Archaebacteria—the third kingdom." Journal of Biological Education 24, no. 4 (December 1990): 229–32. http://dx.doi.org/10.1080/00219266.1990.9655150.

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30

Kelly, D. P. "Microbiology: Crossroads for archaebacteria." Nature 313, no. 6005 (February 1985): 734. http://dx.doi.org/10.1038/313734a0.

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31

Dennis, P. P. "Molecular biology of archaebacteria." Journal of Bacteriology 168, no. 2 (1986): 471–78. http://dx.doi.org/10.1128/jb.168.2.471-478.1986.

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32

Noll, K. M., and T. S. Barber. "Vitamin contents of archaebacteria." Journal of Bacteriology 170, no. 9 (1988): 4315–21. http://dx.doi.org/10.1128/jb.170.9.4315-4321.1988.

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33

Yang, Decheng, Brain P. Kaine, and Carl R. Woese. "The Phylogeny of Archaebacteria." Systematic and Applied Microbiology 6, no. 3 (December 1985): 251–56. http://dx.doi.org/10.1016/s0723-2020(85)80027-8.

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Rosa, Mario De, and Agata Gambacorta. "Lipid biogenesis in archaebacteria." Systematic and Applied Microbiology 7, no. 2-3 (May 1986): 278–85. http://dx.doi.org/10.1016/s0723-2020(86)80020-0.

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35

Ford Doolittle, W. "Archaebacteria coming of age." Trends in Genetics 1 (January 1985): 268–69. http://dx.doi.org/10.1016/0168-9525(85)90101-5.

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Eisenberg, Henryk. "Archaebacteria coming of age." Trends in Biochemical Sciences 13, no. 11 (November 1988): 416–17. http://dx.doi.org/10.1016/0968-0004(88)90207-1.

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Leffers, Henrik, Jørgen Kjems, Laust Østergaard, Niels Larsen, and Roger A. Garrett. "Evolutionary relationships amongst archaebacteria." Journal of Molecular Biology 195, no. 1 (May 1987): 43–61. http://dx.doi.org/10.1016/0022-2836(87)90326-3.

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38

Carteni-Farina, M., M. Porcelli, G. Cacciapuoti, M. Rosa, A. Gambacorta, W. D. Grant, and H. N. M. Ross. "Polyamines in halophilic archaebacteria." FEMS Microbiology Letters 28, no. 3 (July 1985): 323–27. http://dx.doi.org/10.1111/j.1574-6968.1985.tb00814.x.

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Dennis, Patrick P. "Molecular biology of archaebacteria." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 1. http://dx.doi.org/10.1139/m89-001.

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De Rosa, Mario, and Agata Gambacorta. "The lipids of archaebacteria." Progress in Lipid Research 27, no. 3 (January 1988): 153–75. http://dx.doi.org/10.1016/0163-7827(88)90011-2.

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41

THURL, Stephan, Walter WITKE, Ingrid BUHROW, and Wolfram SCHÄFER. "Quinones from Archaebacteria, II. Different Types of Quinones from Sulphur-Dependent Archaebacteria." Biological Chemistry Hoppe-Seyler 367, no. 1 (January 1986): 191–98. http://dx.doi.org/10.1515/bchm3.1986.367.1.191.

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42

Sakane, T., I. Fukuda, T. Itoh, and A. Yokota. "Long-term preservation of halophilic archaebacteria and thermoacidophilic archaebacteria by liquid drying." Journal of Microbiological Methods 16, no. 4 (December 1992): 281–87. http://dx.doi.org/10.1016/0167-7012(92)90080-n.

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43

Gupta, Radhey S. "Protein Phylogenies and Signature Sequences: A Reappraisal of Evolutionary Relationships among Archaebacteria, Eubacteria, and Eukaryotes." Microbiology and Molecular Biology Reviews 62, no. 4 (December 1, 1998): 1435–91. http://dx.doi.org/10.1128/mmbr.62.4.1435-1491.1998.

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SUMMARY The presence of shared conserved insertion or deletions (indels) in protein sequences is a special type of signature sequence that shows considerable promise for phylogenetic inference. An alternative model of microbial evolution based on the use of indels of conserved proteins and the morphological features of prokaryotic organisms is proposed. In this model, extant archaebacteria and gram-positive bacteria, which have a simple, single-layered cell wall structure, are termed monoderm prokaryotes. They are believed to be descended from the most primitive organisms. Evidence from indels

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44

Allmansberger, Rudolf, Martin Bokranz, Lothar Kröckel, Jürgen Schallenberg, and Albrecht Klein. "Conserved gene structures and expression signals in methanogenic archaebacteria." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 52–57. http://dx.doi.org/10.1139/m89-008.

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A comparative analysis of cotranscribed gene clusters comprising the structural genes mcrA, mcrB, mcrC, mcrD, and mcrG was carried out in three species of methanogens. mcrA, mcrB, and mcrG are the structural genes for the three subunits of methyl coenzyme M reductase, while the two other genes encode polypeptides of unknown functions. The degree of conservation of the mcr gene products among different species of methanogens varies. No correlation was found between the conservation of the G + C contents of the homologous genes and of the amino acid sequences of their products among the differen

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45

Datta, Prasun K., Lynda K. Hawkins, and Ramesh Gupta. "Presence of an intron in elongator methionine-tRNA of Halobacterium volcanii." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 189–94. http://dx.doi.org/10.1139/m89-029.

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Abstract (sommario):

The gene for the elongator (internal) methionine transfer RNA [Formula: see text] in the archaebacterium Halobacterium volcanii contains a 75 base pair intron (intervening sequence) and lacks the 3′-terminal CCA sequence of the mature tRNA. There is a single copy of this gene in the genome and it is expressed. Northern hybridization experiments indicate that the precursor is processed to produce mature tRNA and a free intron species. A secondary structure of the transcript can be formed in which the anticodon stem of the tRNA is extended. Two symmetrically placed three-base bulge loops separat

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46

Khotimah, Fina Nurul. "MISKONSEPSI KONSEP ARCHAEBACTERIA DAN EUBACTERIA." EDUSAINS 6, no. 2 (March 3, 2015): 117–28. http://dx.doi.org/10.15408/es.v6i2.1112.

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Abstract (sommario):

Penelitian ini bertujuan untuk mengidentifikasi miskonsepsi siswa pada konsep Archaebacteria dan Eubacteria. Penelitian ini menggunakan metode survei dengan instrumen berupa pilihan ganda beralasan terbuka sebagai alat ukur. Unit analisis dalam penelitian adalah siswa MAN kelas X berjumlah 72 orang. Hasil analisis ditemukan ketidakpahaman pada konsep Archaebacteria dan Eubacteria (61%) yang mendominasi kategori lainnya. Sedangkan kategori Paham konsep dan Miskonsepsi hanya sebesar 19% dan 20%. Miskonsepsi yang dialami siswa dari hasil diagnosa alasan terbuka menunjukkan lebih banyak miskonseps

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47

Stupar, Milanko. "Genetic recombination and the origin of mitochondrion." Archive of Oncology 11, no. 1 (2003): 35–38. http://dx.doi.org/10.2298/aoo0301035s.

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Abstract (sommario):

Division of ancestral prokaryotic genome into two circular double-stranded DNA molecules is a basis for future separate evolution of nuclear and mitochondrion compartments. Universal double sheet of lipid molecules by invagination, at the level of membrane-hairpin attachment, formed two-layered envelope completely surrounding those two DNAs. Presumed ancestral prokaryote in this case is an Archaebacteria, which would lead to formation of six main groups of organisms: Archaebacteria (Archaea) eubacteria, Protista, Fungi, Plantae and Animalia.

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48

Thomm, Michael, Günter Wich, James W. Brown, Gerhard Frey, Bruce A. Sherf, and Gregory S. Beckler. "An archaebacterial promoter sequence assigned by RNA polymerase binding experiments." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 30–35. http://dx.doi.org/10.1139/m89-005.

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Abstract (sommario):

To identify an archaebacterial promoter sequence, nuclease protection studies with the purified RNA polymerase of Methanococcus vannielii were performed. The enzyme binds specifically both at protein-encoding (hisA and methyl CoM reductase, component C) and tRNA–rRNA genes. The binding region of the RNA polymerase extends from 30 base pairs (bp) upstream (−30) to 20 bp downstream (+20) from the in vivo transcription start site. This finding indicates that the archaebacterial enzyme recognizes promoters without transacting traascription factors. The DNA segment protected from nuclease digestion

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49

Ree, Heesoo K., Kaiming Cao, David L. Thurlow, and Robert A. Zimmermann. "The structure and organization of the 16S ribosomal RNA gene from the archaebacterium Thermoplasma acidophilum." Canadian Journal of Microbiology 35, no. 1 (January 1, 1989): 124–33. http://dx.doi.org/10.1139/m89-019.

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Abstract (sommario):

The complete nucleotide sequence of the 16S rRNA gene from Thermoplasma acidophilum, as well as its 5′ and 3′ flanking regions, were determined by the dideoxynucleotide chain termination method. The 16S rRNA gene encodes 1471 nucleotides. The primary and secondary structures of T. acidophilum 16S rRNA both exhibit typical archaebacterial features. The sequence appears to be more closely related to 16S rRNAs of the methanogen–halophile group than to those of the thermoacidophile group. Secondary-structure comparisons generally support this relationship, although there are several examples in wh

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50

SUCKOW, Jörg Michael, and Masashi SUZUKI. "Genomic DNA shuffling in archaebacteria." Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences 75, no. 1 (1999): 10–15. http://dx.doi.org/10.2183/pjab.75.10.

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