HLA-C*14:171, a New Allele With a Rare Extracellular α3 Domain

Area of Science:

• Immunogenetics
• Molecular Biology
• Human Leukocyte Antigen (HLA) research

Background:

• The Human Leukocyte Antigen (HLA) system plays a critical role in immune response and transplantation.
• The HLA-C locus is a highly polymorphic region within the HLA system.
• Accurate HLA typing is essential for matching donors and recipients in organ and stem cell transplantation.

Purpose of the Study:

• To report the identification and characterization of a novel HLA-C allele.
• To describe the specific genetic variation distinguishing this new allele from a known one.

Main Methods:

• High-resolution HLA typing methodologies were employed.
• Sequence analysis was performed to identify nucleotide differences.
• Comparison of the novel sequence against existing HLA allele databases.

Main Results:

• A new HLA-C allele, designated HLA-C*14:171, was discovered.
• This allele differs from HLA-C*14:02:01:01 by a single nucleotide substitution.
• The substitution is located in codon 211 within exon 4 of the HLA-C gene.

Conclusions:

• The identification of HLA-C*14:171 expands the known HLA-C allele repertoire.
• This finding underscores the importance of continuous high-resolution HLA typing for comprehensive population genetic studies.
• Understanding such variations is crucial for improving HLA matching in clinical transplantation settings.