Related Experiment Videos
New HLA-A*11 allele, A*1112, identified by sequence-based typing
E Garino1, M Belvedere, M Berrino
1Transplantation Immunology, San Giovanni Battista Hospital, Turin, Italy. gmazzola@molinette.piemonte.it
Tissue Antigens
|October 9, 2002
Summary
Researchers identified a new Human Leukocyte Antigen (HLA)-A*11 allele, HLA-A*1112, in Italian families. This novel allele differs from HLA-A*11011 by a single nucleotide substitution, confirmed through advanced genetic sequencing.
Area of Science:
- Immunogenetics
- Molecular Biology
- Human Genetics
Background:
- Human Leukocyte Antigen (HLA) genes are crucial for immune response.
- Accurate HLA typing is essential for transplantation and disease association studies.
- The HLA-A locus is highly polymorphic and plays a key role in T-cell mediated immunity.
Observation:
- A novel HLA-A*11 allele, designated HLA-A*1112, was detected during routine HLA typing in two Italian families.
- The allele was initially identified using polymerase chain reaction sequence-specific primers.
- Confirmation was achieved through high-resolution sequencing-based typing.
Findings:
- The nucleotide sequences of exons 2 and 3 of HLA-A*1112 are identical to the known HLA-A*11011 allele.
- A single nucleotide substitution (GAC to GCC) at codon 90 distinguishes HLA-A*1112 from HLA-A*11011.
- This substitution results in a distinct amino acid change, potentially affecting HLA-A protein function.
Implications:
- The discovery of HLA-A*1112 expands the known allelic diversity of the HLA-A locus.
- This finding may be relevant for population genetics studies in Italian cohorts.
- Characterization of novel HLA alleles is vital for refining imputation methods and understanding immune system variations.