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HLA-A*02:411 identified in a platelet donor from China
Xiao-Feng Li1,2,3, Xu Zhang1,2,3, Feng-Qiu Lin1,2,3
1Transfusion Medicine Institute, Liaoning Blood Center, Shenyang, China.
A novel Human Leukocyte Antigen (HLA) allele, HLA-A*02:411, has been identified. It differs from the common HLA-A*02:01:01:01 allele by a single amino acid substitution at position 233.
Area of Science:
- Immunogenetics
- Molecular biology
Background:
- Human Leukocyte Antigen (HLA) genes are crucial for immune response.
- Polymorphisms in HLA alleles can impact immune system function and disease susceptibility.
Purpose of the Study:
- To report the characterization of a newly identified HLA-A allele.
- To describe the specific genetic variations differentiating this new allele from known ones.
Main Methods:
- Nucleotide sequencing of the HLA-A gene.
- Comparison of the novel sequence with existing HLA allele databases.
Main Results:
- A new HLA allele, designated HLA-A*02:411, was identified.
- This allele differs from HLA-A*02:01:01:01 at specific nucleotide positions (770 and 771).
- The nucleotide difference results in a single amino acid change: Threonine (T) at residue 233 instead of Isoleucine (I).
Conclusions:
- The discovery of HLA-A*02:411 expands the known HLA-A allele repertoire.
- This specific amino acid substitution may have implications for peptide binding and T-cell recognition.
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