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Novel HLA-A*31 allele, A*3111 identified by sequence-based typing
1Department of Laboratory Medicine, University of Ulsan College of Medicine, Seoul, Republic of Korea.
Tissue Antigens
|July 21, 2005
Summary
Researchers identified a novel Human Leukocyte Antigen (HLA) allele, HLA-A*3111, in a Korean family. This new HLA variant, detected via sequence-based typing, presents a single nucleotide difference impacting protein structure and serologic reactivity.
Area of Science:
- Immunogenetics
- Molecular Biology
- Human Leukocyte Antigen (HLA) research
Background:
- Human Leukocyte Antigen (HLA) genes are crucial for immune response and transplantation.
- Accurate HLA typing is essential for matching donors and recipients.
- Novel HLA alleles can impact immune system function and disease susceptibility.
Purpose of the Study:
- To report the identification and characterization of a new HLA-A*31 nucleotide sequence variant.
- To describe the genetic and serologic properties of the novel allele.
- To contribute to the comprehensive cataloging of HLA diversity.
Main Methods:
- High-resolution sequence-based typing (SBT) was employed for HLA allele identification.
- Nucleotide sequencing was used to analyze the genetic makeup of the family members.
- Comparison of the novel sequence with known HLA alleles was performed.
Main Results:
- A new HLA-A*31 allele, designated HLA-A*3111, was identified in three individuals from a Korean family.
- HLA-A*3111 differs from HLA-A*310102 by a single nucleotide substitution at codon 165 (GTG to CTG).
- This nucleotide change results in an amino acid alteration (Valine to Leucine at position 165) and altered serologic reactivity.
Conclusions:
- The discovery of HLA-A*3111 expands the known repertoire of HLA-A alleles.
- This novel allele highlights the importance of high-resolution typing for detecting sequence variants.
- Understanding such variations is critical for accurate HLA matching in clinical and research settings.