MHC class I A region diversity and polymorphism in macaque species.

MHC class I A region diversity and polymorphism in macaque species.
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DOI:
10.1007/s00251-007-0201-2
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发表时间:
2007-05
期刊:
影响因子:
3.2
通讯作者:
Bontrop, Ronald E.
Bontrop, Ronald E.
中科院分区:
医学4区
文献类型:
--
作者:
Otting, Nel;de Vos-Rouweler, Annemiek J. M.;Heijmans, Corrine M. C.;de Groot, Natasja G.;Doxiadis, Gaby G. M.;Bontrop, Ronald E.

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人类白细胞抗原A基因座是一个单一拷贝基因,在人类群体中表现出丰富的等位基因多态性,而非人类灵长类物种,如猕猴(Macaca Mulatta),则拥有多个类似人类白细胞抗原A(Mamu-A)的基因,这些基因表现出不同程度的多态。在印度动物群体中,每条染色体上转录的Mamu-A基因的数量和组合显示出多样性。目前,这些不同的A区构型是否是进化上稳定的实体尚不清楚。为了阐明这一问题,对来自中国人群的恒河猴和一组食蟹猴(Macaca Fascularis)进行了各种A区连锁变异的筛查。比较表明,大多数A区构型是在猕猴物种形成之前的旧实体,而大多数等位基因变异(>95%)起源于较新的起源。后一种情况与猕猴和食蟹猴的主要组织相容性复合体II类基因的观察结果形成了对比,根据外显子2的测序,这两种猕猴拥有大量相同的等位基因(>30%)。本文的在线版本(doi:10.1007/s00251-007-0201-2)包含补充材料,授权用户可以使用。
The HLA-A locus represents a single copy gene that displays abundant allelic polymorphism in the human population, whereas, in contrast, a nonhuman primate species such as the rhesus macaque (Macaca mulatta) possesses multiple HLA-A-like (Mamu-A) genes, which parade varying degrees of polymorphism. The number and combination of transcribed Mamu-A genes present per chromosome display diversity in a population of Indian animals. At present, it is not clearly understood whether these different A region configurations are evolutionarily stable entities. To shed light on this issue, rhesus macaques from a Chinese population and a panel of cynomolgus monkeys (Macaca fascicularis) were screened for various A region-linked variations. Comparisons demonstrated that most A region configurations are old entities predating macaque speciation, whereas most allelic variation (>95%) is of more recent origin. The latter situation contrasts the observations of the major histocompatibility complex class II genes in rhesus and cynomolgus macaques, which share a high number of identical alleles (>30%) as defined by exon 2 sequencing. The online version of this article (doi:10.1007/s00251-007-0201-2) contains supplementary material, which is available to authorized users.
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