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Evolution of MHC class I genes in two ancient fish, paddlefish (Polyodon spathula) and Chinese sturgeon (Acipenser sinensis).

Identifieur interne : 000385 ( PubMed/Curation ); précédent : 000384; suivant : 000386

Evolution of MHC class I genes in two ancient fish, paddlefish (Polyodon spathula) and Chinese sturgeon (Acipenser sinensis).

Auteurs : Dengqiang Wang [République populaire de Chine] ; Lei Zhong ; Qiwei Wei ; Xiaoni Gan ; Shunping He

Source :

RBID : pubmed:20542035

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English descriptors

Abstract

Here we present the first isolation of major histocompatibility complex (MHC) class I genes from two ancient fish, paddlefish (Polyodon spathula) and Chinese sturgeon (Acipenser sinensis). Seventeen sequences obtained showed high polymorphism and positive natural selection with dN/dS>1. Evolutionary relationships revealed that sequences from paddlefish and Chinese sturgeon distinguished from other vertebrate class I and had an intermingling of alleles, which indicates that Acipenseriformes have a common ancestral gene of class I and a trans-species polymorphism across Acipenseriformes. We also found clear evidence of recombination among class I genes of paddlefish and Chinese sturgeon.

DOI: 10.1016/j.febslet.2010.05.065
PubMed: 20542035

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