Molecular analysis of six dog leukocyte antigen class I sequences including three complete genes, two truncated genes and one full-length processed gene

Tissue Antigens. 1997 May;49(5):484-95. doi: 10.1111/j.1399-0039.1997.tb02783.x.

Abstract

We have isolated six distinct dog leukocyte antigen (DLA) class I sequences. An additional functional nonclassical class I gene, DLA-79, was characterized previously. This brings the number of isolated canine class I sequences to seven. These seven loci account for nearly all class I sequences detected in genomic DNA by Southern blotting. With approximately seven members, the class I gene family in dog is considerably less complex than in either human or mouse. Three of the six sequences described in this article contain complete class I genes. These genes have the typical arrangement of exons and introns, and their predicted protein sequences have the features expected of expressed class I molecules. Two sequences contain truncated genes. These genes, having only partial class I homology and disruptive mutations, are clearly nonfunctional. The remaining locus contains a full-length processed gene which is unique among characterized class I loci. Sequence comparisons were performed to examine evolutionary relationships among the family members. Two sequences, DLA-64 (complete) and -53 (truncated), appear to be chimeras presumably formed by interlocus recombination. Using the reverse transcription-polymerase chain reaction, mRNA originating from each of the three complete genes was identified in canine peripheral blood leukocytes. DLA-79 specific transcripts were identified previously. Thus, each of the four complete canine class I genes is transcribed in vivo.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Dogs
  • Histocompatibility Antigens Class I / genetics*
  • Humans
  • Mice
  • Molecular Sequence Data
  • Sequence Alignment
  • Sequence Analysis, DNA*

Substances

  • Histocompatibility Antigens Class I

Associated data

  • GENBANK/U55026
  • GENBANK/U55027
  • GENBANK/U55028
  • GENBANK/U55029
  • GENBANK/U55030
  • GENBANK/U55031