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A novel HLA-B allele: HLA-B*5419.

K W Lee¹, J J Seo

¹Hallym Institution for Genome Application, Hallym University, Anyang, South Korea. hlakw@hanmail.net

Tissue Antigens

|October 23, 2009

Summary

Human leukocyte antigen (HLA) B*5419 differs from B*5401 by one nucleotide substitution. This single nucleotide change results in a distinct HLA allele with potential implications for immune response.

Area of Science:

Immunogenetics
Molecular biology
Human leukocyte antigen (HLA) research

Background:

The human leukocyte antigen (HLA) system is crucial for immune regulation.
Allelic variations within HLA genes can influence immune responses and disease susceptibility.
Specific HLA alleles, such as those in the B locus, are important for T-cell recognition.

Purpose of the Study:

To characterize the molecular difference between two closely related HLA-B alleles.
To identify the specific genetic variation distinguishing HLA-B*5419 from HLA-B*5401.

Main Methods:

Nucleotide sequencing of relevant HLA-B gene regions.
Comparative analysis of DNA sequences between HLA-B*5419 and HLA-B*5401.

Main Results:

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HLA-B*5419 is distinguished from HLA-B*5401 by a single nucleotide substitution.
The substitution occurs at codon 13, changing the DNA sequence from TCC to TTC.
This results in an amino acid change from Serine to Phenylalanine at position 13.

Conclusions:

The identified single nucleotide polymorphism (SNP) defines the HLA-B*5419 allele.
This molecular difference may have functional consequences for peptide binding and T-cell receptor interaction.
Further studies are warranted to explore the immunological impact of this specific allelic variation.