HLA-B*40:02:18, a new HLA-B*40 allele

Area of Science:

• * Human Leukocyte Antigen (HLA) genetics
• * Molecular immunology
• * Genetic polymorphism

Background:

• * The Human Leukocyte Antigen (HLA) system is crucial for immune response.
• * Accurate HLA typing is essential for transplantation and disease association studies.
• * Continuous discovery of new HLA alleles refines our understanding of immune diversity.

Purpose of the Study:

• * To report the identification and initial characterization of a novel HLA-B allele.
• * To detail the specific genetic variation distinguishing the new allele from a known one.

Main Methods:

• * Analysis of DNA sequences from individuals.
• * Comparison of nucleotide sequences to identify variations.
• * Standard nomenclature for HLA allele naming.

Main Results:

• * A new HLA allele, designated B*40:02:18, has been identified.
• * This allele differs from B*40:02:01 by a single nucleotide substitution at codon 111 (CGC to CGT).

Conclusions:

• * The identification of B*40:02:18 expands the known repertoire of HLA-B alleles.
• * This finding underscores the importance of high-resolution HLA typing for comprehensive genetic databases.