rdf:type |
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lifeskim:mentions |
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pubmed:issue |
9
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pubmed:dateCreated |
2002-9-5
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pubmed:databankReference |
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pubmed:abstractText |
The freshwater pufferfish Tetraodon nigroviridis (TNI) has become highly attractive as a compact reference vertebrate genome for gene finding and validation. We have mapped genes, which are more or less evenly spaced on the human chromosomes 9 and X, on Tetraodon chromosomes using fluorescence in situ hybridization (FISH), to establish syntenic relationships between Tetraodon and other key vertebrate genomes. PufferFISH revealed that the human X is an orthologous mosaic of three Tetraodon chromosomes. More than 350 million years ago, an ancestral vertebrate autosome shared orthologous Xp and Xq genes with Tetraodon chromosomes 1 and 7. The shuffled order of Xp and Xq orthologs on their syntenic Tetraodon chromosomes can be explained by the prevalence of evolutionary inversions. The Tetraodon 2 orthologous genes are clustered in human Xp11 and represent a recent addition to the eutherian X sex chromosome. The human chromosome 9 and the avian Z sex chromosome show a much lower degree of synteny conservation in the pufferfish than the human X chromosome. We propose that a special selection process during vertebrate evolution has shaped a highly conserved array(s) of X-linked genes long before the X was used as a mammalian sex chromosome and many X chromosomal genes were recruited for reproduction and/or the development of cognitive abilities. [Sequence data reported in this paper have been deposited in GenBank and assigned the following accession no: AJ308098.]
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pubmed:commentsCorrections |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Sep
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pubmed:issn |
1088-9051
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
12
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1316-22
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pubmed:dateRevised |
2009-11-18
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pubmed:meshHeading |
pubmed-meshheading:12213768-Animals,
pubmed-meshheading:12213768-Chickens,
pubmed-meshheading:12213768-Chromosomes, Human, Pair 9,
pubmed-meshheading:12213768-Conserved Sequence,
pubmed-meshheading:12213768-DNA,
pubmed-meshheading:12213768-Evolution, Molecular,
pubmed-meshheading:12213768-Genes,
pubmed-meshheading:12213768-Genetic Markers,
pubmed-meshheading:12213768-Humans,
pubmed-meshheading:12213768-Molecular Sequence Data,
pubmed-meshheading:12213768-Synteny,
pubmed-meshheading:12213768-Tetraodontiformes,
pubmed-meshheading:12213768-X Chromosome
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pubmed:year |
2002
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pubmed:articleTitle |
Four-hundred million years of conserved synteny of human Xp and Xq genes on three Tetraodon chromosomes.
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pubmed:affiliation |
Comparative Genomics Group, Research School of Biological Sciences, Australian National University, Canberra, ACT 2601, Australia.
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pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, Non-U.S. Gov't
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