Abstract:
BACKGROUND:Chaetognaths, or arrow worms, are small marine, bilaterally symmetrical metazoans. The objective of this study was to analyse ribosomal protein (RP) coding sequences from a published collection of expressed sequence tags (ESTs) from a chaetognath (Spadella cephaloptera) and to use them in phylogenetic studies. RESULTS:This analysis has allowed us to determine the complete primary structures of 23 out of 32 RPs from the small ribosomal subunit (SSU) and 32 out of 47 RPs from the large ribosomal subunit (LSU). Ten proteins are partially determined and 14 proteins are missing. Phylogenetic analyses of concatenated RPs from six animals (chaetognath, echinoderm, mammalian, insect, mollusc and sponge) and one fungal taxa do not resolve the chaetognath phylogenetic position, although each mega-sequence comprises approximately 5,000 amino acid residues. This is probably due to the extremely biased base composition and to the high evolutionary rates in chaetognaths. However, the analysis of chaetognath RP genes revealed three unique features in the animal Kingdom. First, whereas generally in animals one RP appeared to have a single type of mRNA, two or more genes are generally transcribed for one RP type in chaetognath. Second, cDNAs with complete 5'-ends encoding a given protein sequence can be divided in two sub-groups according to a short region in their 5'-ends: two novel and highly conserved elements have been identified (5'-TAATTGAGTAGTTT-3' and 5'-TATTAAGTACTAC-3') which could correspond to different transcription factor binding sites on paralog RP genes. And, third, the overall number of deduced paralogous RPs is very high compared to those published for other animals. CONCLUSION:These results suggest that in chaetognaths the deleterious effects of the presence of paralogous RPs, such as apoptosis or cancer are avoided, and also that in each protein family, some of the members could have tissue-specific and extra-ribosomal functions. These results are congruent with the hypotheses of an allopolyploid origin of this phylum and of a ribosome heterogeneity.
journal_name
BMC Evol Bioljournal_title
BMC evolutionary biologyauthors
Barthélémy RM,Chenuil A,Blanquart S,Casanova JP,Faure Edoi
10.1186/1471-2148-7-146subject
Has Abstractpub_date
2007-08-28 00:00:00pages
146issn
1471-2148pii
1471-2148-7-146journal_volume
7pub_type
杂志文章abstract:BACKGROUND:Fiddler crabs, genus Uca, are classic examples of how intense sexual selection can produce exaggerated male traits. Throughout the genus the enlarged "major" cheliped (claw) of the male fiddler crab is used both as a signal for attracting females and as a weapon for combat with other males. However, the morp...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-13-137
更新日期:2013-07-15 00:00:00
abstract:BACKGROUND:The extant squamates (>9400 known species of lizards and snakes) are one of the most diverse and conspicuous radiations of terrestrial vertebrates, but no studies have attempted to reconstruct a phylogeny for the group with large-scale taxon sampling. Such an estimate is invaluable for comparative evolutiona...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-13-93
更新日期:2013-04-29 00:00:00
abstract:BACKGROUND:Recent models suggest that escalating reciprocal selection among antagonistically interacting species is predicted to occur in areas of higher resource productivity. In a putatively coevolved interaction between a freshwater snail (Mexipyrgus churinceanus) and a molluscivorous cichlid (Herichthys minckleyi),...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-7-50
更新日期:2007-03-30 00:00:00
abstract:BACKGROUND:The hypothesis of an RNA-based origin of life, known as the "RNA world", is strongly affected by the hostile environmental conditions probably present in the early Earth. In particular, strong UV and X-ray radiations could have been a major obstacle to the formation and evolution of the first biomolecules. I...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-7-S2-S2
更新日期:2007-08-16 00:00:00
abstract:BACKGROUND:Nuclear progesterone receptor (nPR) is an evolutionary innovation in vertebrates that mediates genomic responses to progesterone. Vertebrates also respond to progesterone via membrane progesterone receptors (mPRs) or membrane associated progesterone receptors (MAPRs) through rapid nongenomic mechanisms. Lamp...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-019-1463-7
更新日期:2019-07-01 00:00:00
abstract:BACKGROUND:NASP is an essential protein in mammals that functions in histone transport pathways and maintenance of a soluble reservoir of histones H3/H4. NASP has been studied exclusively in Opisthokonta lineages where some functional diversity has been reported. In humans, growing evidence implicates NASP miss-regulat...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-14-139
更新日期:2014-06-20 00:00:00
abstract:BACKGROUND:Phylactolaemata is commonly regarded the earliest branch within Bryozoa and thus the sister group to the other bryozoan taxa, Cyclostomata and Gymnolaemata. Therefore, the taxon is important for the reconstruction of the bryozoan morphological ground pattern. In this study the myoanatomy of Pectinatella magn...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-017-1068-y
更新日期:2017-11-07 00:00:00
abstract:BACKGROUND:Understanding the genetic and evolutionary mechanisms of speciation genes in sexually reproducing organisms would provide important insights into mammalian reproduction and fitness. PRDM9, a widely known speciation gene, has recently gained attention for its important role in meiotic recombination and hybrid...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-017-0892-4
更新日期:2017-03-14 00:00:00
abstract:BACKGROUND:Adaptive radiations are triggered by ecological opportunity - the access to novel niche domains with abundant available resources that facilitate the formation of new ecologically divergent species. Therefore, as new species saturate niche space, clades experience a diversity-dependent slowdown of diversific...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-019-1344-0
更新日期:2019-01-09 00:00:00
abstract:BACKGROUND:The seacoasts of the Japanese Arc are fringed by many gravel beaches owing to active tectonic uplift and intense denudation caused by heavy rainfall. These gravel beaches are inhabited by gobies of the genus Luciogobius that burrow into the gravel sediment and live interstitially. Although their habitat and ...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-9-145
更新日期:2009-06-28 00:00:00
abstract:BACKGROUND:Histone modification is an epigenetic mechanism that influences gene regulation in eukaryotes. In particular, histone modifications in CpG islands (CGIs) are associated with different chromatin states and with transcription activity. Changes in gene expression play a crucial role in adaptation and evolution....
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-13-145
更新日期:2013-07-10 00:00:00
abstract:BACKGROUND:The rate of nucleotide substitutions is not constant across the Tree of Life, and departures from a molecular clock have been commonly reported. Within parmelioid lichens, the largest group of macrolichens, large discrepancies in branch lengths between clades were found in previous studies. Using an extended...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-8-257
更新日期:2008-09-22 00:00:00
abstract:BACKGROUND:Many earthworm species demonstrate significant cryptic diversity, with several highly diverged mitochondrial lineages found within most of the taxa studied to date. The status of differences between these lineages on the nuclear level is still unclear. Because of widespread polyploidy in earthworms, most stu...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-019-1370-y
更新日期:2019-02-26 00:00:00
abstract:BACKGROUND:Population genetics theory predicts an important role of differences in the effective population size (N e ) among species on shaping the accumulation of functional mutations by regulating the selection efficiency. However, this correlation has never been tested in domesticated animals. RESULTS:Here, we syn...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-018-1120-6
更新日期:2018-01-19 00:00:00
abstract:BACKGROUND:The TRIM family is composed of multi-domain proteins that display the Tripartite Motif (RING, B-box and Coiled-coil) that can be associated with a C-terminal domain. TRIM genes are involved in ubiquitylation and are implicated in a variety of human pathologies, from Mendelian inherited disorders to cancer, a...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-8-225
更新日期:2008-08-01 00:00:00
abstract:BACKGROUND:Numerous biological functions of long intergenic non-coding RNAs (lincRNAs) have been identified. However, the contribution of lincRNAs to the domestication process has remained elusive. Following domestication from their wild ancestors, animals display substantial changes in many phenotypic traits. Therefor...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-017-1036-6
更新日期:2017-08-15 00:00:00
abstract:BACKGROUND:Protein domains are the structural, functional and evolutionary units of the protein. Protein domain architectures are the linear arrangements of domain(s) in individual proteins. Although the evolutionary history of protein domain architecture has been extensively studied in microorganisms, the evolutionary...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-12-6
更新日期:2012-01-17 00:00:00
abstract:BACKGROUND:Refugial populations in Quaternary glaciations are critical to understanding the evolutionary history and climatic interactions of many extant species. Compared with the well-studied areas of Europe and Northern America, refugia of species in eastern Asia remain largely unknown. Here, we investigated the phy...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-018-1269-z
更新日期:2018-10-11 00:00:00
abstract::An amendment to this paper has been published and can be accessed via the original article. ...
journal_title:BMC evolutionary biology
pub_type: 已发布勘误
doi:10.1186/s12862-020-01686-5
更新日期:2020-10-07 00:00:00
abstract:BACKGROUND:Clear examples of ecological speciation exist, often involving divergence in trophic morphology. However, substantial variation also exists in how far the ecological speciation process proceeds, potentially linked to the number of ecological axes, traits, or genes subject to divergent selection. In addition,...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-13-135
更新日期:2013-07-03 00:00:00
abstract:BACKGROUND:The chloroplast genes matK and rbcL have been proposed as a "core" DNA barcode for identifying plant species. Published estimates of successful species identification using these loci (70-80%) may be inflated because they may have involved comparisons among distantly related species within target genera. To ...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-12-73
更新日期:2012-05-30 00:00:00
abstract:BACKGROUND:Hepatitis B virus (HBV) is an important infectious agent that causes widespread concern because billions of people are infected by at least 8 different HBV genotypes worldwide. However, reconstruction of the phylogenetic relationship between HBV genotypes is difficult. Specifically, the phylogenetic relation...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-13-120
更新日期:2013-06-11 00:00:00
abstract:BACKGROUND:Senescence is integral to the flowering plant life-cycle. Senescence-like processes occur also in non-angiosperm land plants, algae and photosynthetic prokaryotes. Increasing numbers of genes have been assigned functions in the regulation and execution of angiosperm senescence. At the same time there has bee...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-9-163
更新日期:2009-07-14 00:00:00
abstract:BACKGROUND:In nuptial gift-giving species, benefits of acquiring a mate may select for male deception by donation of worthless gifts. We investigated the effect of worthless gifts on mating success in the spider Pisaura mirabilis. Males usually offer an insect prey wrapped in silk; however, worthless gifts containing i...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-11-329
更新日期:2011-11-14 00:00:00
abstract:BACKGROUND:The Hox family of transcription factors has a fundamental role in segmentation pathways and axial patterning of embryonic development and their clustered organization is linked with the regulatory mechanisms governing their coordinated expression along embryonic axes. Among chordates, of particular interest ...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-11-330
更新日期:2011-11-15 00:00:00
abstract:BACKGROUND:Phenotypic plasticity operates across generations, when the parental environment affects phenotypic expression in the offspring. Recent studies in invertebrates have reported transgenerational plasticity in phenotypic responses of offspring when the mothers had been previously exposed to either live or heat-...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-016-0737-6
更新日期:2016-08-27 00:00:00
abstract:BACKGROUND:Vertebrate SWS1 visual pigments mediate visual transduction in response to light at short wavelengths. Due to their importance in vision, SWS1 genes have been isolated from a surprisingly wide range of vertebrates, including lampreys, teleosts, amphibians, reptiles, birds, and mammals. The SWS1 genes exhibit...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-6-97
更新日期:2006-11-15 00:00:00
abstract:BACKGROUND:Phylogeography and historical demography of the cyprinid fish Diptychus maculatus (subfamily Schizothoracinae) are evaluated across three river systems in the Northern Qinghai-Tibetan Plateau (QTP) and Tien Shan range: the Indus River, Tarim River and Ili River. RESULTS:Results from both mtDNA (16S rRNA, Cy...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-016-0756-3
更新日期:2016-09-09 00:00:00
abstract:BACKGROUND:Remipedia were initially seen as a primitive taxon within Pancrustacea based on characters considered ancestral, such as the homonomously segmented trunk. Meanwhile, several morphological and molecular studies proposed a more derived position of Remipedia within Pancrustacea, including a sister group relatio...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/1471-2148-13-119
更新日期:2013-06-10 00:00:00
abstract:BACKGROUND:A key to understanding the origins of species is determining the evolutionary processes that drive the patterns of genomic divergence during speciation. New genomic technologies enable the study of high-resolution genomic patterns of divergence across natural speciation continua, where taxa pairs with differ...
journal_title:BMC evolutionary biology
pub_type: 杂志文章
doi:10.1186/s12862-015-0486-y
更新日期:2015-09-24 00:00:00