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	A complete dna sequence map of the ovine major histocompatibility complex
	Gao, Jianfeng1,2; Liu, Ka1,4; Liu, Haibo1,4; Blair, Hugh T.3; Li, Gang1,2; Chen, Chuangfu2; Tan, Pingping1; Ma, Runlin Z.1,4
刊名	Bmc genomics
	2010-08-10
卷号	11页码:8
ISSN号	1471-2164
DOI	10.1186/1471-2164-11-466
通讯作者	Ma, runlin z.(rlma@genetics.ac.cn)
英文摘要	Background: the ovine major histocompatibility complex (mhc) harbors clusters of genes involved in overall resistance/susceptibility of an animal to infectious pathogens. however, only a limited number of ovine mhc genes have been identified and no adequate sequence information is available, as compared to those of swine and bovine. we previously constructed a bac clone-based physical map that covers entire class i, class ii and class iii region of ovine mhc. here we describe the assembling of a complete dna sequence map for the ovine mhc by shotgun sequencing of 26 overlapping bac clones. results: dna shotgun sequencing generated approximately 8-fold genome equivalent data that were successfully assembled into a finished sequence map of the ovine mhc. the sequence map spans approximately 2,434,000 nucleotides in length, covering almost all of the mhc loci currently known in the sheep and cattle. gene annotation resulted in the identification of 177 protein-coding genes/orfs, among which 145 were not previously reported in the sheep, and 10 were ovine species specific, absent in cattle or other mammals. a comparative sequence analyses among human, sheep and cattle revealed a high conservation in the mhc structure and loci order except for the class ii, which were divided into iia and iib subregions in the sheep and cattle, separated by a large piece of non-mhc autosome of approximately 18.5 mb. in addition, a total of 18 non-protein-coding micrornas were predicted in the ovine mhc region for the first time. conclusion: an ovine mhc dna sequence map was successfully assembled by shotgun sequencing of 26 overlapping bac clone. this makes the sheep the second ruminant species for which the complete mhc sequence information is available for evolution and functional studies, following that of the bovine. the results of the comparative analysis support a hypothesis that an inversion of the ancestral chromosome containing the mhc has shaped the mhc structures of ruminants, as we currently observed in the sheep and cattle. identification of relative large numbers of micrornas in the ovine mhc region helps to provide evidence that micrornas are actively involved in the regulation of mhc gene expression and function.
WOS关键词	CLASS-II REGION ; ADAPTIVE IMMUNE-SYSTEM ; RADIATION HYBRID MAP ; GENOMIC SEQUENCE ; OVAR-MHC ; GENES ; CATTLE ; SHEEP ; LOCI ; ORGANIZATION
WOS研究方向	Biotechnology & Applied Microbiology ; Genetics & Heredity
WOS类目	Biotechnology & Applied Microbiology ; Genetics & Heredity
语种	英语
出版者	BIOMED CENTRAL LTD
WOS记录号	WOS:000282788800001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2413709
专题	中国科学院大学
通讯作者	Ma, Runlin Z.
作者单位	1.Chinese Acad Sci, Inst Genet & Dev Biol, Beijing 100101, Peoples R China 2.Shihezi Univ, Sch Life Sci, Xinjiang 832007, Peoples R China 3.Massey Univ, Inst Vet Anim & Biomed Sci, Palmerston North, New Zealand 4.Chinese Acad Sci, Grad Sch, Beijing 100149, Peoples R China
推荐引用方式 GB/T 7714	Gao, Jianfeng,Liu, Ka,Liu, Haibo,et al. A complete dna sequence map of the ovine major histocompatibility complex[J]. Bmc genomics,2010,11:8.
APA	Gao, Jianfeng.,Liu, Ka.,Liu, Haibo.,Blair, Hugh T..,Li, Gang.,...&Ma, Runlin Z..(2010).A complete dna sequence map of the ovine major histocompatibility complex.Bmc genomics,11,8.
MLA	Gao, Jianfeng,et al."A complete dna sequence map of the ovine major histocompatibility complex".Bmc genomics 11(2010):8.

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