Cloning and sequencing analysis of a novel allele HLA-A*02:251 / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 300-303, 2011.
Article
in Chinese
| WPRIM
| ID: wpr-326942
ABSTRACT
<p><b>OBJECTIVE</b>To identify a novel human leukocyte antigen (HLA) allele A*02251 and analyze the sequences in Chinese population.</p><p><b>METHODS</b>Routine HLA-A, -B, -DRB1 high resolution genotyping for healthy Chinese donors and patients was performed with polymerase chain reaction-sequence based typing. An unknown HLA-A allele was initially detected by HLA typing in the healthy donor. Genomic DNA of the HLA-A locus in the proband was amplified, the amplified product was cloned by PMD18-T to split the two alleles, and selected clones were sequenced.</p><p><b>RESULTS</b>The sequencing results showed that a normal A*020601 and a novel A*02251 variant allele were identified. The sequence of the novel allele has been submitted to GenBank (HM245348). Nucleotide sequence alignments with HLA-A allele from the IMGT/HLA Sequence Database showed that the novel A*02 variant allele differed from the closest allele A*02010101 by nt 383 G to C (codon 128 GAG to GAC) in exon 3, which resulted in one amino acid substitution of Glu to Asp. The HLA-A, B, C and DQB1 alleles of the healthy donor did not match with that of the patient.</p><p><b>CONCLUSION</b>This novel allele is officially designated as HLA-A*02251 by World Health Organization(WHO) Nomenclature Committee (Submission ID HWS10010755). The sequence of HLA-A locus in exon 3 is confirmed to be polymorphic in Chinese population.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Molecular Sequence Data
/
Base Sequence
/
HLA-A Antigens
/
Exons
/
Sequence Alignment
/
Cloning, Molecular
/
Sequence Analysis, DNA
/
Alleles
/
Genetics
/
Genotype
Limits:
Humans
/
Male
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2011
Type:
Article
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