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Identification of four novel HLA-DOA alleles, DOA*010106, DOA*0102, DOA*0103, and DOA*0104N, by sequence-based

S-M Moon1, H Gu, H-J Ryu

  • 1National Genome Research Institute, National Institute of Health, Eunpyung-Gu, Seoul, Korea.

Tissue Antigens
|August 17, 2005
PubMed

Insights

Four novel human leucocyte antigen-DOA allele types were identified in the Korean population, revealing previously unknown synonymous and non-synonymous amino acid variations. These findings expand the known diversity of DOA sequences and their potential implications.

Area of Science:

  • Immunogenetics
  • Molecular biology
  • Human genetics

Background:

  • Human leucocyte antigen-DOA (H LA-DOA) sequences are critical for immune responses.
  • Previous understanding suggested identical protein sequences for known DOA alleles.

Purpose of the Study:

  • To identify and characterize novel allele types of human leucocyte antigen-DOA (H LA-DOA) within the Korean population.
  • To analyze the genetic variations, including synonymous and non-synonymous changes, in these novel DOA alleles.

Main Methods:

  • DNA sequencing of the H LA-DOA gene.
  • Bioinformatic analysis to identify nucleotide and amino acid variations.
  • Comparison with existing H LA-DOA allele databases.

Main Results:

  • Identification of four novel H LA-DOA allele types from the Korean population.
  • DOA*010106 exhibits a synonymous nucleotide change at codon 45 compared to DOA*010103.
  • DOA*0102, DOA*0103, and DOA*0104N present non-synonymous amino acid substitutions (Leu99Val, Arg105Cys) and a frameshift mutation, respectively.

Conclusions:

  • The study reveals significant genetic diversity within the H LA-DOA locus in the Korean population.
  • Novel alleles demonstrate variations that can alter protein sequences, impacting immune function.
  • These findings contribute to a more comprehensive understanding of H LA-DOA polymorphism.

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