Diversity analysis at MHC class II DQA locus in buffalo (Bubalus bubalis) indicates extensive duplication and trans-species evolution.

Abstract:

:Variation at MHC Class II-DQA locus in riverine and swamp buffaloes (Bubu) has been explored in this study. Through sequencing of buffalo DQA, 48 nucleotide variants identified from 17 individuals, reporting 42 novel alleles, including one pseudogene. Individual animal displayed two to seven variants, suggesting the presence of more than two Bubu-DQA loci, as an evidence of extensive duplication. dN values were found to be higher than dS values at peptide binding sites, separately for riverine and swamp buffaloes, indicating locus being under positive selection. Evolutionary analysis revealed numerous trans-species polymorphism with alleles from water buffalo assigned to at least three different loci (Bubu-DQA1, DQA2, DQA3). Alleles of both the sub-species intermixed within the cluster, showing convergent evolution of MHC alleles in bovines. The results thus suggest that both riverine and swamp buffaloes share con-current arrangement of DQA region, comparable to cattle in terms of copy number and population polymorphism.

journal_name

Genomics

journal_title

Genomics

authors

Mishra SK,Niranjan SK,Singh R,Kumar P,Kumar SL,Banerjee B,Kataria RS

doi

10.1016/j.ygeno.2020.07.041

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

4417-4426

issue

6

eissn

0888-7543

issn

1089-8646

pii

S0888-7543(20)30251-2

journal_volume

112

pub_type

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