A physical map of a BAC clone contig covering the entire autosome insertion between ovine MHC Class IIa and IIb

BMC Genomics

Research Article

Hugh T Blair¹  Jianfeng Gao²  Gang Li³  Shasha Jiao³  Haibo Liu⁴  Xiaoran Cui⁴  Pingping Tan⁴  Ka Liu⁵  Peng Zhang⁵  Runlin Z Ma⁶ 

[1] Institute of Veterinary Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand;Joint Research Center for Sheep Breeding and Developmental Biology, IGDB-Massey University, Massey, New Zealand;School of Life Sciences, Shihezi University, 832003, Xinjiang, China;Joint Research Center for Sheep Breeding and Developmental Biology, IGDB-Massey University, Massey, New Zealand;School of Life Sciences, Shihezi University, 832003, Xinjiang, China;State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 100101, Beijing, China;State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 100101, Beijing, China;State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 100101, Beijing, China;Graduate University of Chinese Academy of Sciences, 100149, Beijing, China;State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Science, 100101, Beijing, China;Joint Research Center for Sheep Breeding and Developmental Biology, IGDB-Massey University, Massey, New Zealand;Graduate University of Chinese Academy of Sciences, 100149, Beijing, China;Institute of Genetics and Developmental Biology, Chinese Academy of Science, 100101, Beijing, China;

关键词: Ovine;    MHC;    OLA;    Physical map;    BAC;    Comparative mapping;   

DOI  :  10.1186/1471-2164-13-398

 received in 2012-01-21, accepted in 2012-08-03,  发布年份 2012

来源: Springer

【 摘 要 】

BackgroundThe ovine Major Histocompatibility Complex (MHC) harbors genes involved in overall resistance/susceptibility of the host to infectious diseases. Compared to human and mouse, the ovine MHC is interrupted by a large piece of autosome insertion via a hypothetical chromosome inversion that constitutes ~25% of ovine chromosome 20. The evolutionary consequence of such an inversion and an insertion (inversion/insertion) in relation to MHC function remains unknown. We previously constructed a BAC clone physical map for the ovine MHC exclusive of the insertion region. Here we report the construction of a high-density physical map covering the autosome insertion in order to address the question of what the inversion/insertion had to do with ruminants during the MHC evolution.ResultsA total of 119 pairs of comparative bovine oligo primers were utilized to screen an ovine BAC library for positive clones and the orders and overlapping relationships of the identified clones were determined by DNA fingerprinting, BAC-end sequencing, and sequence-specific PCR. A total of 368 positive BAC clones were identified and 108 of the effective clones were ordered into an overlapping BAC contig to cover the consensus region between ovine MHC class IIa and IIb. Therefore, a continuous physical map covering the entire ovine autosome inversion/insertion region was successfully constructed. The map confirmed the bovine sequence assembly for the same homologous region. The DNA sequences of 185 BAC-ends have been deposited into NCBI database with the access numbers HR309252 through HR309068, corresponding to dbGSS ID 30164010 through 30163826.ConclusionsWe have constructed a high-density BAC clone physical map for the ovine autosome inversion/insertion between the MHC class IIa and IIb. The entire ovine MHC region is now fully covered by a continuous BAC clone contig. The physical map we generated will facilitate MHC functional studies in the ovine, as well as the comparative MHC evolution in ruminants.

【 授权许可】

Unknown   
© Li et al.; licensee BioMed Central Ltd. 2012. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.