Short communication (Scientific journals)
The bovine genomic DNA sequence data reveal three IGHV subgroups, only one of which is functionally expressed
Niku, Mikael; Liljavirta, Jenni; Durkin, Keith et al.
2012In Developmental and Comparative Immunology, 37, p. 457-461
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Keywords :
Immunoglobulin; Heavy chain; Variable segment; Germline repertoire; Bovine; Cattle; Genome
Abstract :
[en] A comprehensive analysis of cattle shotgun sequencing data reveals 36 immunoglobulin heavy chain variable genes. The previously described bovine subgroup IGHV1 contains 10 functional genes with a conserved promoter including the consensus octamer and several other transcription factor binding sites, intact exons and matching cDNA sequences. Subgroups IGHV2 and IGHV3 consist entirely of pseudogenes. Thus, the bovine germline IGHV repertoire is very limited. The IGHV genes are distributed in mammalian clans I and II, while no clan III genes were detected. Clan-specific PCR of genomic DNA from cattle, sheep, Eurasian elk, white-tailed deer, pig and dolphin indicates highly dynamic evolution of IGHV gene usage within Cetartiodactyla. The bovine germline IGHV repertoire was probably generated by recent duplications of an IGHV1-IGHV2 homology unit. Immunoglobulin heavy chain genes are largely incorrectly assembled in the current cattle genome versions Btau_4.2 and UMD_3.1. FISH experiments confirm an IGHV locus close to terminus of BTA21.
Disciplines :
Genetics & genetic processes
Author, co-author :
Niku, Mikael;  University of Helsinki > Department of Veterinary Biosciences
Liljavirta, Jenni
Durkin, Keith  ;  Université de Liège - ULiège > Département de productions animales > GIGA-R : Génomique animale
Schroderus, Eero
Iivanainen, Antti;  University of Helsinki > Department of Veterinary Biosciences
Language :
English
Title :
The bovine genomic DNA sequence data reveal three IGHV subgroups, only one of which is functionally expressed
Publication date :
2012
Journal title :
Developmental and Comparative Immunology
ISSN :
0145-305X
Publisher :
Elsevier Science, Tarrytown, United States - New York
Volume :
37
Pages :
457-461
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 January 2013

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