Characterisation of the novel HLA-DPB1*1618:01 allele by sequencing-based typing
Marine Cargou1, Vincent Elsermans2, Isabelle Top2
1CHU de Bordeaux, Laboratoire d'Immunologie et Immunogénétique, Hôpital Pellegrin, Bordeaux, France.
HLA
|September 5, 2024
Summary
The human leukocyte antigen (HLA) DPB1*1618:01 allele is distinguished from HLA-DPB1*18:01:01:01 by a single nucleotide substitution. This genetic variation occurs at codon 215 within exon 4.
Area of Science:
- Immunogenetics
- Molecular Biology
- Human Leukocyte Antigen (HLA) System
Background:
- The HLA system plays a critical role in immune response and transplantation.
- Accurate HLA allele identification is essential for clinical applications and research.
- Specific variations within HLA genes can impact immune function and disease susceptibility.
Purpose of the Study:
- To precisely characterize the genetic difference between two specific HLA-DPB1 alleles.
- To identify the molecular basis for the distinction between HLA-DPB1*1618:01 and HLA-DPB1*18:01:01:01.
Main Methods:
- Comparative sequence analysis of HLA-DPB1 alleles.
- Focus on nucleotide sequence differences in coding regions.
Main Results:
- A single nucleotide substitution was identified as the sole difference between HLA-DPB1*1618:01 and HLA-DPB1*18:01:01:01.
- This substitution is located at codon 215 in exon 4 of the HLA-DPB1 gene.
Conclusions:
- The genetic distinction between HLA-DPB1*1618:01 and HLA-DPB1*18:01:01:01 is attributed to a specific nucleotide change.
- This finding contributes to the detailed cataloging of HLA allele variations.
- Understanding such precise genetic differences is fundamental for HLA typing accuracy.
