Abstract:
: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.
journal_name
Dev Comp Immunoljournal_title
Developmental and comparative immunologyauthors
Niku M,Liljavirta J,Durkin K,Schroderus E,Iivanainen Adoi
10.1016/j.dci.2012.02.006subject
Has Abstractpub_date
2012-07-01 00:00:00pages
457-61issue
3-4eissn
0145-305Xissn
1879-0089pii
S0145-305X(12)00029-8journal_volume
37pub_type
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