Abstract:
:By a chromosome walking strategy the DNA region from Methanococcus vannielii flanking the genes for protein synthesis elongation factor (EF) 1 alpha and EF-2 was cloned and sequenced. A gene organization of 5' - beta' - open reading frame (ORF) 1 - ORF2 - S12 - S7 - EF-2 - EF-1 alpha - S10 - ORF3 - ORF4 - 3' was found where beta', S12, S7, S10, EF-2, and EF-1 alpha represent gene products with sequences similar to the beta' subunit of RNA polymerase, ribosomal proteins S12, S7, and S10, and EF-G and EF-Tu from Escherichia coli, respectively. ORF1-4 represent gene products with no known eubacterial counterparts. Northern blot analysis of transcripts and nuclease S1 mapping showed that transcription initiates between beta' and ORF1 and terminates at the 3' side of the S10 gene and that the genes from ORF1 to S10 are cotranscribed. Apart from the presence of two additional ORFs, ORF1 and ORF2, and of the gene for S10, this organization is identical to that of the eubacterial "streptomycin operon." ORF1 displays sequence similarity to rat liver ribosomal protein L30 and may represent one of the "additional" ribosomal proteins of Methanococcus. The sequenced part of the beta' gene and the EF-2 and EF-1 alpha gene products from Methanococcus are more similar to their eukaryotic than to their eubacterial counterparts. It appears, therefore, that the genetic organization of the translational components resembles the situation in eubacteria, whereas their primary structures are more eukaryotic in nature.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
Lechner K,Heller G,Böck Adoi
10.1007/BF02106178subject
Has Abstractpub_date
1989-07-01 00:00:00pages
20-7issue
1eissn
0022-2844issn
1432-1432journal_volume
29pub_type
杂志文章abstract::Nucleotide polymorphisms in two North American balsam poplars (Populus trichocarpa Torr. & Gray and P. balsamifera L.; section Tacamahaca), and one Eurasian aspen (P. tremula L.; section Populus) were compared using nine loci involved in defense, stress response, photoperiodism, freezing tolerance, and housekeeping. N...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-012-9504-5
更新日期:2012-06-01 00:00:00
abstract::Two types of gene encoding small subunits (SSU) of ADP-glucose pyrophosphorylase, a starch-biosynthetic enzyme, have been found in cereals and other grasses. One of these genes encodes two SSU proteins. These are targeted to different subcellular compartments and expressed in different organs of the plant: the endospe...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-007-9013-0
更新日期:2007-09-01 00:00:00
abstract::Since the discovery of the coelacanth, Latimeria chalumnae, more than 50 years ago, paleontologists and comparative morphologists have debated whether coelacanths or lungfishes, two groups of lobe-finned fishes, are the closest living relatives of land vertebrates (Tetrapoda). Previously, Meyer and Wilson (1990) deter...
journal_title:Journal of molecular evolution
pub_type: 杂志文章,评审
doi:10.1007/BF00183221
更新日期:1992-08-01 00:00:00
abstract::The internal transcribed spacer region (ITS) of the nuclear rDNA cistron represents the barcoding locus for Fungi. Intragenomic variation of this multicopy gene can interfere with accurate phylogenetic reconstruction of biological entities. We investigated the amount and nature of this variation for the lichenized fun...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-013-9603-y
更新日期:2014-02-01 00:00:00
abstract::DNA methylation is one of the many hypotheses proposed to explain the observed deficiency in CpG dinucleotides in a variety of genomes covering a wide taxonomic distribution. Recent studies challenged the methylation hypothesis on empirical grounds. First, it cannot explain why the Mycoplasma genitalium genome exhibit...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-003-0003-6
更新日期:2003-01-01 00:00:00
abstract::The evolution of viral genomes has recently attracted considerable attention. We compare the sequences of two large viral genomes, EsV-1 and FirrV-1, belonging to the family of phaeoviruses which infect different species of marine brown algae. Although their genomes differ substantially in size, these viruses share si...
journal_title:Journal of molecular evolution
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doi:10.1007/s00239-003-2501-y
更新日期:2003-12-01 00:00:00
abstract::We present two new models of protein sequence evolution based on structural properties of mitochondrial proteins. We compare these models with others currently used in phylogenetic analyses, investigating their performance over both short and long evolutionary distances. We find that our models that incorporate second...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239001-0052-7
更新日期:2002-04-01 00:00:00
abstract::It has been argued that downstream enzymes in metabolic pathways are expected to be subject to reduced selective constraint, while upstream enzymes, particularly those at pathway branch points, are expected to exhibit more frequent adaptive substitution than downstream enzymes. We examined whether these expectations a...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-008-9105-5
更新日期:2008-08-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/pl00006151
更新日期:1997-03-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF00174042
更新日期:1995-07-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02101983
更新日期:1984-01-01 00:00:00
abstract::The DNA sequences of three members of the Alu family of repeated sequences located 5' to the chimpanzee alpha 2 gene have been determined. The base sequences of the three corresponding human Alu family repeats have been previously determined, permitting the comparison of identical Alu family members in human and chimp...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02115687
更新日期:1985-01-01 00:00:00
abstract::Evolutionary divergence times can be inferred from molecular distances if a molecular clock can be assumed and if the substitution rate can be estimated. We present new evidence from relative rate tests that the rate of substitution at fourfold degenerate sites of nuclear genome-coding DNA is uniform in primate and ro...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/pl00000066
更新日期:1997-01-01 00:00:00
abstract::We studied the genomic organization of Hox genes in Atlantic salmon (Salmo salar) and made comparisons to that in rainbow trout (Oncorhynchus mykiss), another member of the family Salmonidae. We used these two species to test the hypothesis that the Hox genes would provide evidence for a fourth round of duplication (4...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-004-0338-7
更新日期:2005-11-01 00:00:00
abstract::Restriction modification (RM) systems serve to protect bacteria against bacteriophages. They comprise a restriction endonuclease activity that specifically cleaves DNA and a corresponding methyltransferase activity that specifically methylates the DNA, thereby protecting it from cleavage. Such systems are very common ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02198833
更新日期:1996-02-01 00:00:00
abstract::Circadian clock genes are remarkably conserved between eucoelomates. Although Drosophila has one copy of each major component, vertebrates have two or (in the case of the Period genes) three paralogs (Per1-3). We investigated the possibility that the vertebrate Per genes arose through two genome duplications during th...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-005-0185-1
更新日期:2006-06-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02498635
更新日期:1996-04-01 00:00:00
abstract::Molecular characteristics, especially 18S rDNA sequences, may be of great value for the study of bivalve evolution and its numerous morphological convergencies once the reliability of these data can be evaluated. The analysis of 11 published complete molluscan sequences and two new ones, Arca noae and Atrina pectinata...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02352300
更新日期:1996-07-01 00:00:00
abstract::The present work represents the first attempt to study in greater detail previously proposed compositional correlations in genomes, based on a body of additional data relating to gene localizations as well as to extended flanking sequences extracted from gene banks. We have investigated the correlations that exist bet...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02102651
更新日期:1991-06-01 00:00:00
abstract::Single-fly polymerase chain reaction amplification and direct DNA sequencing revealed high levels of length polymorphism in the threonine-glycine encoding repeat region of the period (per) gene in natural populations of Drosophila melanogaster. DNA comparison of two alleles of identical lengths gave a high number of s...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02342746
更新日期:1991-03-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF01733888
更新日期:1978-06-20 00:00:00
abstract::The in vitro expression of two distinct proteins from overlapping reading frames in a sequence of rainbow trout genomic DNA has been demonstrated. In vitro transcription of DNA sequences, cloned in a plasmid under the control of Salmonella phage 6 polymerase promoter, led to the synthesis of two distinct and functiona...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02099952
更新日期:1986-01-01 00:00:00
abstract::Computational analysis of the hypothetical open reading frame MJ0236 from Methanococcus jannaschii reveals its membership to a family of bacterial and eukaryotic proteins, predicted to be the HMP-P kinases involved in thiamin biosyntheis (ThiD). The eukaryotic members of this family contain a C-terminal extension simi...
journal_title:Journal of molecular evolution
pub_type: 信件
doi:10.1007/pl00013145
更新日期:1997-12-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02101000
更新日期:1986-01-01 00:00:00
abstract::To get deeper insight into the evolution of phosphoenolpyruvate carboxylase we have identified PEPC fragments (about 1,100 bp) of another 12 plants species not yet investigated in this context. The selected plants include one Chlorophyta, two Bryophyta, four Pteridophyta, and five Spermatophyta species. The obtained p...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/pl00006277
更新日期:1998-01-01 00:00:00
abstract::Abortive cycling features transcription initiation by RNA polymerase in both prokaryote and eukaryote. It is known that T7 RNA polymerase produces abortive transcripts up to eight ribonucleotides in length depending on the initial sequence of the DNA message. On the other hand, T7 RNA polymerase initiates DNA replicat...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF00160407
更新日期:1994-12-01 00:00:00
abstract::Two protein-coding regions (cytochrome b, ATPase 8, and part of ATPase 6) from mitochondrial DNA of Cottus kessleri, Cottocomephorus grewingki, and Cottocomephorus inermis--Baikalian endemic sculpins--were amplified via polymerase chain reaction, and sequenced. Two novel primers--L8352 (5'-TAAAGATTGGTGAC TCCCAACCACC) ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF00163855
更新日期:1992-01-01 00:00:00
abstract::Phylogenetic hypotheses of muscle actin evolution are significantly different when a sea urchin is used as a representative echinoderm than when a sea star is used. While sea urchin muscle actins support an echinoderm-chordate sister relationship, sea star sequences suggest that echinoderm muscle actins are convergent...
journal_title:Journal of molecular evolution
pub_type: 评论,杂志文章
doi:10.1007/s002399910018
更新日期:2000-02-01 00:00:00
abstract::The entire mitochondrial DNA control region (mtDNA D-loop) was sequenced in the seven extant species of Alectoris partridges. The D-loop length is very conserved (1155 +/- 2 nucleotides), and substitution rates are lower than for the mitochondrial cytochrome b gene of the same species, on average. Comparative analyses...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/pl00006402
更新日期:1998-10-01 00:00:00
abstract::Simple sequence repeats (SSRs) in DNA sequences are tandem iterations of a single nucleotide or a short oligonucleotide. SSRs are subject to slipped-strand mutations and a common source of phase variation in bacteria and antigenic variation in pathogens. Significantly long SSRs are generally rare in prokaryotic genome...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-008-9166-5
更新日期:2008-11-01 00:00:00