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ULBP4/RAET1E is highly polymorphic in the Old World monkey.

Taeko K Naruse1, Yukiko Okuda, Kazuyasu Mori

  • 1Department of Molecular Pathogenesis, Medical Research Institute, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Japan.

Immunogenetics
|May 10, 2011
PubMed
Summary
This summary is machine-generated.

Natural-killer group 2 member D (NKG2D) ligands, ULBP4/RAET1E, show greater genetic diversity in macaques than humans. This allelic diversification predates the divergence of these primate species.

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Area of Science:

  • Immunology
  • Genetics
  • Primate research

Background:

  • Natural-killer group 2 member D (NKG2D) is a key activating receptor in cellular immunity.
  • ULBP/RAET1 gene family encodes NKG2D ligands, crucial for immune responses.
  • Old World monkeys, including macaques, are vital models in immunological research.

Purpose of the Study:

  • To investigate the genetic polymorphisms of ULBP4/RAET1E in rhesus and crab-eating macaques.
  • To compare the diversity of ULBP4/RAET1E alleles between these primate species and humans.
  • To understand the evolutionary history of ULBP4/RAET1E diversification.

Main Methods:

  • DNA sequencing to identify ULBP4/RAET1E alleles.
  • Bioinformatic analysis of sequence data.
  • Phylogenetic analysis to infer evolutionary relationships.

Main Results:

  • Identified 25 ULBP4/RAET1E alleles in rhesus macaques and 14 in crab-eating macaques.
  • Observed significantly greater allelic diversity in macaques compared to humans.
  • Phylogenetic analysis indicated that ULBP4/RAET1E diversification occurred before the divergence of these macaque species.

Conclusions:

  • ULBP4/RAET1E exhibits extensive allelic polymorphism in Old World monkeys.
  • The high diversity suggests strong selective pressures on NKG2D ligand evolution in primates.
  • Understanding macaque ULBP4/RAET1E diversity is crucial for their use as immunological research models.