Abstract:
:Two competing effects at two vastly different scales may explain collagen's current translation length. The necessity to have long molecules for maintaining mechanical integrity at the organism and supraorganism scales may be limited by the need to have small molecules capable of robust self-assembly at the nanoscale. The triglycine repeat regions of all 556 currently cataloged organisms with collagen-like genes were ranked by length. This revealed a sharp boundary in the GXY transcript number at 1032 amino acids (344 GXY repeats). An anomalous exception, however, is the intron-free Trichodesmium erythraeum collagen gene. Immunogold atomic force microscopy reveals, for the first time, the presence of a collagen-like protein in T. erythraeum. A phylogenetic protein sequence analysis which includes vertebrates, nonvertebrates, shrimp white spot syndrome virus, Streptococcus equi, and Bacillus cereus predicts that the collagen-like sequence may have emerged shortly after the divergence of fibrillar and nonfibrillar collagens. The presence of this anomalously long collagen gene within a prokaryote may represent an interdomain transfer from eukaryotes into prokaryotes that gives T. erythraeum the ability to form blooms that cover hundreds of square kilometers of ocean. We propose that the collagen gene entered the prokaryote intron-free only after it had been molded by years of mechanical selective pressure in larger organisms and only after large, dense food sources such as marine vertebrates became available. This anomalously long collagen-like sequence may explain T. erythraeum's ability to aggregate and thus concentrate its toxin for food-source procurement.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
Layton BE,D'Souza AJ,Dampier W,Zeiger A,Sabur A,Jean-Charles Jdoi
10.1007/s00239-008-9111-7subject
Has Abstractpub_date
2008-06-01 00:00:00pages
539-54issue
6eissn
0022-2844issn
1432-1432journal_volume
66pub_type
杂志文章abstract::Analysis of the expanded data set of Sibley and Ahlquist (1987) on primate phylogeny using a maximum likelihood mixed model analysis of variance method shows that there is significant evidence for resolving the Homo-Pan-Gorilla trifurcation in favor of a Homo-Pan clade. The resulting tree is close to that estimated by...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02111286
更新日期:1987-01-01 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
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更新日期:2006-03-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-001-0049-2
更新日期:2002-03-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02338832
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abstract::While studies of the evolutionary histories of protein families are commonplace, little is known on noncoding RNAs beyond microRNAs and some snoRNAs. Here we investigate in detail the evolutionary history of the nine spliceosomal snRNA families (U1, U2, U4, U5, U6, U11, U12, U4atac, and U6atac) across the completely o...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-008-9149-6
更新日期:2008-12-01 00:00:00
abstract::Compared with the X chromosome, the mammalian Y chromosome is considerably diminished in size and has lost most of its ancestral genes during evolution. Interestingly, for the X-degenerate region on the Y chromosome, human has retained all 16 genes, while chimpanzee has lost 4 of the 16 genes since the divergence of t...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-008-9189-y
更新日期:2009-02-01 00:00:00
abstract::Copia is a retrotransposon that appears to be distributed widely among the Drosophilidae subfamily. Evolutionary analyses of regulatory regions have indicated that the Copia retrotransposon evolved through both positive and purifying selection, and that horizontal transfer (HT) could also explain its patchy distributi...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-011-9435-6
更新日期:2011-03-01 00:00:00
abstract::RNA has a myriad of biological roles in contemporary life. We use the RNA paradigm for genotype-phenotype mappings to study the evolution of multiple coding in dependence to mutation rates. We study three different one-to-many genotype-phenotype mappings which have the potential to encode the information for multiple ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-014-9648-6
更新日期:2014-12-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF01732751
更新日期:1979-06-08 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/pl00006474
更新日期:1999-03-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章,评审
doi:10.1007/BF02407346
更新日期:1993-08-01 00:00:00
abstract::The recent availability of genome sequences of four different Fusarium species offers the opportunity to perform extensive comparative analyses, in particular of repeated sequences. In a recent work, the overall content of such sequences in the genomes of three phylogenetically related Fusarium species, F. graminearum...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-011-9472-1
更新日期:2011-10-01 00:00:00
abstract::Short interspersed DNA elements (SINEs) amplify by retroposition either by (i) successive waves of amplification from one or a few evolving master genes or by (ii) the generation of new master genes that coexist with their progenitors. Individual, highly conserved, elements of the B1 SINE family were identified from t...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s002390010087
更新日期:2000-09-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-001-0040-y
更新日期:2002-05-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF01733261
更新日期:1978-12-29 00:00:00
abstract::The gene (fus) coding for elongation factor G (EF-G) of the extremely thermophilic eubacterium Thermotoga maritima was identified and sequenced. The EF-G coding sequence (2046 bp) was found to lie in an operon-like structure between the ribosomal protein S7 gene (rpsG) and the elongation factor Tu (EF-Tu) gene (tuf). ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02193628
更新日期:1991-08-01 00:00:00
abstract::Phylogenetic relationships of 25 mammalian species representing 17 of the 18 eutherian orders were examined using DNA sequences from a 1.2-kb region of the 5' end of exon 1 of the single-copy nuclear gene known as interphotoreceptor retinoid binding protein (IRBP). A wide variety of methods of analysis of the DNA sequ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF02337352
更新日期:1996-08-01 00:00:00
abstract::Members of the serpin (serine protease inhibitor) superfamily of genes are well represented in both human and murine genomes. In many cases it is possible to identify a definite ortholog on the basis of sequence similarity and by examining the surrounding genes at syntenic loci. We have recently examined the murine se...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-004-2640-9
更新日期:2004-10-01 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
abstract::Microsporidia are a group of obligate intracellular eukaryotic parasites with small genomes. They infect animals from a wide variety of phyla, including humans. Two manganese superoxide dismutase (MnSOD) genes, designated NbMnSOD1 and NbMnSOD2, were found to be organized in a tandem array within the Nosema bombycis ge...
journal_title:Journal of molecular evolution
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journal_title:Journal of molecular evolution
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更新日期:2001-10-01 00:00:00
abstract::The genome organization of the Hardness locus in the tribe Triticeae constitutes an excellent model for studying the mechanisms of evolution that played a role in the preservation and potential functional innovations of duplicate genes. Here we applied the nonsynonymous-synonymous rate ratio (d ( N )/d ( S ) or omega)...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-005-0292-z
更新日期:2006-10-01 00:00:00
abstract::Quantitative immunological comparisons of three avian proteins, transferrin, ovalbumin, and penalbumin, indicate that penguins are phylogenetically most closely related to loons, albatrosses, herons, and grebes. These data support the theory that the ancestors of penguins were flying oceanic birds and that flightlessn...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF01731000
更新日期:1976-10-27 00:00:00
abstract::Sequence comparisons of 14 distinct MHC class I cDNA clones isolated from species representing the three major taxonomic lineages of Felidae (domestic cat lineage, ocelot lineage, and pantherine lineage) revealed that feline MHC class I alleles have highly mosaic structures with short polymorphic sequence motifs that ...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF00178246
更新日期:1994-07-01 00:00:00
abstract::Fox and Woese (1975a) have shown that a model of 5S RNA secondary structure similar to the one originally derived for Chlorella 5S RNA can be generalized with relatively minor variations to all sequenced 5S RNA molecules, i.e. that corresponding base paired regions can be formed at approximately the same positions. We...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF01796136
更新日期:1977-09-20 00:00:00
abstract::In this study, the molecular population genetics of the orangutan's alpha-2 globin (HBA2) gene were investigated in order to test for the action of natural selection. Haplotypes from 28 orangutan chromosomes were collected from a 1.46-kilobase region of the alpha-2 globin locus. While many aspects of the data were con...
journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/s00239-004-0201-x
更新日期:2005-03-01 00:00:00
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF01732473
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
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journal_title:Journal of molecular evolution
pub_type: 杂志文章
doi:10.1007/BF00173175
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