PMID- 27517292 OWN - NLM STAT- MEDLINE DCOM- 20170515 LR - 20181113 IS - 1432-1211 (Electronic) IS - 0093-7711 (Linking) VI - 69 IP - 1 DP - 2017 Jan TI - Egernia stokesii (gidgee skink) MHC I positively selected sites lack concordance with HLA peptide binding regions. PG - 49-61 LID - 10.1007/s00251-016-0947-5 [doi] AB - Genes of the major histocompatibility complex (MHC) play an important role in vertebrate disease resistance, kin recognition and mate choice. Mammalian MHC is the most widely characterised of all vertebrates, and attention is often given to the peptide binding regions of the MHC because they are presumed to be under stronger selection than non-peptide binding regions. For vertebrates where the MHC is less well understood, researchers commonly use the amino acid positions of the peptide binding regions of the human leukocyte antigen (HLA) to infer the peptide binding regions within the MHC sequences of their taxon of interest. However, positively selected sites within MHC have been reported to lack correspondence with the HLA in fish, frogs, birds and reptiles including squamates. Despite squamate diversity, the MHC has been characterised in few snakes and lizards. The Egernia group of scincid lizards is appropriate for investigating mechanisms generating MHC variation, as their inclusion will add a new lineage (i.e. Scincidae) to studies of selection on the MHC. We aimed to identify positively selected sites within the MHC of Egernia stokesii and then determine if these sites corresponded with the peptide binding regions of the HLA. Six positively selected sites were identified within E. stokesii MHC I, only two were homologous with the HLA. E. stokesii positively selected sites corresponded more closely to non-lizard than other lizard taxa. The characterisation of the MHC of more intermediate taxa within the squamate order is necessary to understand the evolution of the MHC across all vertebrates. FAU - Pearson, Sarah K AU - Pearson SK AD - School of Biological Sciences, Flinders University of South Australia, Bedford Park, Adelaide, 5042, Australia. sarah.pearson@flinders.edu.au. FAU - Bull, C Michael AU - Bull CM AD - School of Biological Sciences, Flinders University of South Australia, Bedford Park, Adelaide, 5042, Australia. FAU - Gardner, Michael G AU - Gardner MG AD - School of Biological Sciences, Flinders University of South Australia, Bedford Park, Adelaide, 5042, Australia. AD - Evolutionary Biology Unit, South Australian Museum, North Terrace, Adelaide, 5000, Australia. LA - eng PT - Journal Article DEP - 20160812 PL - United States TA - Immunogenetics JT - Immunogenetics JID - 0420404 RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Peptide Fragments) SB - IM MH - Alleles MH - Amino Acid Sequence MH - Animals MH - *Biological Evolution MH - HLA Antigens/genetics/*metabolism MH - Histocompatibility Antigens Class I/genetics/*metabolism MH - Humans MH - Lizards/*genetics/metabolism MH - Peptide Fragments/genetics/*metabolism MH - Protein Binding MH - Sequence Homology, Amino Acid OTO - NOTNLM OT - Egernia stokesii OT - MHC OT - Peptide binding region OT - Positively selected sites OT - Scincidae OT - Squamata EDAT- 2016/08/16 06:00 MHDA- 2017/05/16 06:00 CRDT- 2016/08/13 06:00 PHST- 2016/06/05 00:00 [received] PHST- 2016/07/25 00:00 [accepted] PHST- 2016/08/16 06:00 [pubmed] PHST- 2017/05/16 06:00 [medline] PHST- 2016/08/13 06:00 [entrez] AID - 10.1007/s00251-016-0947-5 [pii] AID - 10.1007/s00251-016-0947-5 [doi] PST - ppublish SO - Immunogenetics. 2017 Jan;69(1):49-61. doi: 10.1007/s00251-016-0947-5. Epub 2016 Aug 12.