Abstract：
:Fish protamines are highly specialized molecules which are responsible for chromatin condensation during the last stages of spermatogenesis (spermiogenesis). However, not all fish contain protamines in their sperm nuclei; rather, there seems to be a random distribution of protamines within this group. The origin of this sporadic presence of protamines in the sperm and its significance have not yet been precisely determined. In this paper we have conducted an exhaustive survey of the literature available on the different types of nuclear protein composition of the sperm of teleost fish in order to try to correlate these data with what is presently known about the taxonomy of this group. The results of this analysis have allowed us to make the following observations. The divergence between protamines and histones has occurred several times during the evolution of the bony fish. However, the relative frequency of this divergence is almost negligible during the differentiation of genera and species (intrafamily variation) and is very small during the differentiation of families (interfamily variation). Nevertheless, the divergence is very noticeable among the different orders. It is therefore possible to conclude from all this that the sporadic distribution of protamines in bony fish is not a random event as initially believed. Furthermore, such a heterogeneous distribution of protamines cannot be easily accounted for by a mechanism of horizontal retroviral transmission through repeated and independent acquisition of a protamine gene as has been recently proposed (Jankowski, Stater, Dixon (1986) J Mol Evol 23:1-10). Rather, it could possibly be explained by a repeated and independent loss of the expression of the protamine gene (or loss of the gene itself) which mainly occurred during the diversification of the orders of this group.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
Saperas N,Ausio J,Lloris D,Chiva Mdoi
10.1007/BF00160152subject
Has Abstractpub_date
1994-09-01 00:00:00pages
282-95issue
3eissn
0022-2844issn
1432-1432journal_volume
39pub_type
杂志文章abstract：:In Trypanoplasma borelli, a representative of the Bodonina within the Kinetoplastida, glyceraldehyde-3-phosphate dehydrogenase (GAPDH) activity was detected in both the cytosol and glycosomes. This situation is similar to that previously found in Trypanosomatidae, belonging to a different Kinetoplastida suborder. In T...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF00164030
更新日期：1995-04-01 00:00:00
abstract：:It has been argued that the common ancestor of about 75% of all dicots possessed an S-RNase-based gametophytic self-incompatibility (GSI) system. S-RNase genes should thus be found in most plant families showing GSI. The S-RNase gene (or a duplicate) may also acquire a new function and thus genes belonging to the S-RN...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-008-9137-x
更新日期：2008-08-01 00:00:00
abstract：:The previously given systems-theoretic model for the synthesis of optical antipodes (AD and AL) in strongly asymmetric yield, which shows mono-bistable behaviour depending on the degree of "openess" of the chemical reaction system is reconsidered for two equal compartments (subscripts 1 and 2 on A) with coupling by di...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF01732292
更新日期：1975-10-29 00:00:00
abstract：:As illustrated by the mitochondrion and the eukaryotic cell, little in biology makes sense except in light of mutualism. Mutualisms are persistent, intimate, and reciprocal exchanges; an organism proficient in obtaining certain benefits confers those on a partner, which reciprocates by conferring different benefits. M...
journal_title：Journal of molecular evolution
pub_type： 杂志文章,评审
doi：10.1007/s00239-017-9804-x
更新日期：2017-08-01 00:00:00
abstract：:Twenty-seven protein sequence elements, six to nine amino acids long, were extracted from 15 phylogenetically diverse complete prokaryotic proteomes. The elements are present in all of these proteomes, with at least one copy each (omnipresent elements), and have presumably been conserved since the last universal commo...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-007-9032-x
更新日期：2007-12-01 00:00:00
abstract：:The bacterial endosymbionts (Buchnera) from the aphids Rhopalosiphum padi, R. maidis, Schizaphis graminum, and Acyrthosiphon pisum contain the genes for anthranilate synthase (trpEG) on plasmids made up of one or more 3.6-kb units. Anthranilate synthase is the first as well as the rate-limiting enzyme in the tryptopha...
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：:TT virus (TTV) has a remarkable genetic heterogeneity. To study TTV evolution, phylogenetic analyses were performed on 739 DNA sequences mapping in the N22 region of ORF1. Analysis of neighbor-joining consensus trees shows significant differences between DNA and protein phylogeny. Median joining networks phylogenetic ...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-002-2352-y
更新日期：2002-11-01 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
pub_type： 杂志文章
doi：10.1007/s00239-010-9394-3
更新日期：2010-12-01 00:00:00
abstract：:Four genes in the P450 IID gene subfamily were isolated from Sprague-Dawley rat lambda EMBL 3 and Charon 4A genomic libraries and completely sequenced. Their transcription start sites were determined by primer extension analysis. The four genes designated IID2, IID3, IID4, and IID5 span 4036, 4371, 4678, and 4567 bp, ...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF02099942
更新日期：1990-02-01 00:00:00
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journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF02198855
更新日期：1996-02-01 00:00:00
abstract：:Proteins are commonly used as molecular targets against pathogens such as viruses and bacteria. However, pathogens can evolve rapidly permitting their populations to increase in protein diversity over time and thus escape to the activity of a molecular therapy. Subsequently, in order to design more durable and robust ...
journal_title：Journal of molecular evolution
pub_type： 信件
doi：10.1007/s00239-020-09953-1
更新日期：2020-08-01 00:00:00
abstract：:The pentose phosphate cycle is considered as a major source of NADPH and pentose needed for nucleic acid biosynthesis. 6-Phosphogluconate dehydrogenase (6PGD), an enzyme participating in this cycle, catalyzes the oxidative decarboxylation of 6PGD to ribulose 5-phosphate with the subsequent release of CO2 and the reduc...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-004-2630-y
更新日期：2004-09-01 00:00:00
abstract：:Friedreich ataxia is an autosomal recessive neurodegenerative disorder associated with a GAA repeat expansion in the first intron of the gene (FRDA) encoding a novel, highly conserved, 210 amino acid protein known as frataxin. Normal variation in repeat size was determined by analysis of more than 600 DNA samples from...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s002390010151
更新日期：2001-03-01 00:00:00
abstract：:Male sex genes have shown a pattern of rapid interspecies divergence at both the coding and gene expression level. A common outcome from crosses between closely-related species is hybrid male sterility. Phenotypic and genetic studies in Drosophila sterile hybrid males have shown that spermatogenesis arrest is postmeio...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-010-9404-5
更新日期：2011-01-01 00:00:00
abstract：:Rooted phylogenetic trees for a total of 34 genes encoding the stimulatory (s alpha), inhibitory (i alpha), transducin (t alpha), Gx (x alpha), Gz (z alpha), G11 (alpha 11), G12 (alpha 12), G13 (alpha 13), G16 (alpha 16), Gq (q alpha), and other (o alpha) G protein alpha subunits have been constructed. The analysis sh...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF00178599
更新日期：1992-09-01 00:00:00
abstract：:Androgen effects mediated by the androgen receptor (AR) are essential for male reproductive development and virilization. Comparison of AR DNA coding sequence from five primate species, Homo sapiens (human), Pan troglodytes (chimpanzee), Papio hamadryas (baboon), Macaca fascicularis (macaque), and Eulemur fulvus colla...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/pl00006391
更新日期：1998-09-01 00:00:00
abstract：:Ubiquitin is remarkable for its ubiquitous distribution and its extreme protein sequence conservation. Ubiquitin genes comprise direct repeats of the ubiquitin coding unit with no spacers. The nucleotide sequences of several ubiquitin repeats from each of humans, chicken, Xenopus, Drosophila, barley, and yeast have re...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF02100041
更新日期：1987-01-01 00:00:00
abstract：:Explicit evaluation of the accuracy and power of maximum likelihood and Bayesian methods for detecting site-specific positive Darwinian selection presents a challenge because selective consequences of single amino acid changes are generally unknown. We exploited extensive molecular and functional characterization of a...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-008-9172-7
更新日期：2008-11-01 00:00:00
abstract：:A cDNA encoding a new member of the gene family of major royal jelly proteins (MRJPs) from the honeybee, Apis mellifera, was isolated and sequenced. Royal jelly (RJ) is a secretion of the cephalic glands of nurse bees. The origin and biological function of the protein component (12.5%, w/w) of RJ is unknown. We show t...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/pl00006551
更新日期：1999-08-01 00:00:00
abstract：:We recently sequenced the genome of the first subterrestrial metazoan, the nematode Halicephalobus mephisto. A central finding was a dramatic expansion of genes encoding avrRpt2 induced gene (AIG1), and 70 kDa heat shock (Hsp70) domains. While the role of Hsp70 in thermotolerance is well established, the contribution ...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-019-09900-9
更新日期：2019-12-01 00:00:00
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journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-008-9068-6
更新日期：2008-03-01 00:00:00
abstract：:Complement control proteins (CCPs) contain repeated protein domains, short consensus repeats (SCRs), which must be relevant to diverse functions such as complement activation, coagulation, viral binding, fetal implantation, and self-nonself recognition. Although SCRs share some discontinuous and imperfect motifs, ther...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-004-2609-8
更新日期：2004-08-01 00:00:00
abstract：:Studies so far have correlated the variation in the composition of snake venoms with the target prey population and snake's diet. Here we present the first example of an alternative evolutionary link between venom composition and dietary adaptation of snakes. We describe a dinucleotide deletion in the only three finge...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s00239-004-0138-0
更新日期：2005-01-01 00:00:00
abstract：:Calmodulin is a calcium-binding EF-hand protein that is an activator of many enzymes as well as ion pumps and channels. Due to its multiple targets and its central role in the cell, understanding the evolutionary history of calmodulin genes should provide insights into the origin of genetic complexity in eukaryotes. W...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/s002390010074
更新日期：2000-08-01 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：:In the traditional concept for the origin of life as proposed by Oparin and Haldane in the 1920s, prebiotic reactants became slowly concentrated in the primordial oceans and life evolved slowly from a series of highly protracted chemical reactions during the first billion years of Earth's history. However, chemical e...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF02102187
更新日期：1991-01-01 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
abstract：:The problem of determining the minimal phylogenetic tree is discussed in relation to graph theory. It is shown that this problem is an example of the Steiner problem in graphs which is to connect a set of points by a minimal length network where new points can be added. There is no reported method of solving realistic...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF01732868
更新日期：1979-07-18 00:00:00
abstract：:Oligonucleotide cataloguing has been used to characterize a number of 5S RNA species from various Procaryotes. Such catalogs can be used to establish certain and detailed phylogenetic relationships among organisms. Confining attention at present to four Families of Procaryotes, theEnterobacteriaceae, theBacillaceae, t...
journal_title：Journal of molecular evolution
pub_type： 杂志文章
doi：10.1007/BF01659163
更新日期：1972-06-01 00:00:00
abstract：:There have been two distinct phases of evolution of the genetic code: an ancient phase--prior to the divergence of the three domains of life, during which the standard genetic code was established--and a modern phase, in which many alternative codes have arisen in specific groups of genomes that differ only slightly f...
journal_title：Journal of molecular evolution
pub_type： 杂志文章,评审
doi：10.1007/s00239-015-9686-8
更新日期：2015-06-01 00:00:00
