Related Experiment Video
Updated: Aug 8, 2026
09:00
A Multi-detection Assay for Malaria Transmitting Mosquitoes
Published on: February 28, 2015
High resolution sequence-based DPB1 typing identified two novel DPB1 alleles, DPB1*9401 and DPB1*9501, from a Kenyan
1Department of Medical Microbiology, University of Manitoba, Winnipeg, Canada.
Tissue Antigens
|August 2, 2003
Summary
Two novel Human Leukocyte Antigen (HLA)-DPB1 alleles were discovered in Kenya. This research highlights new genetic variations, including a unique amino acid change at codon 70, revealing extensive HLA-DPB1 diversity in East Africa.
Area of Science:
- Immunogenetics
- Molecular Anthropology
Background:
- The Human Leukocyte Antigen (HLA) complex plays a crucial role in immune response and transplantation.
- High-resolution typing of HLA loci is essential for understanding population genetics and disease associations.
- Previous studies have indicated significant diversity within HLA loci across different ethnic groups.
Purpose of the Study:
- To identify and characterize novel Human Leukocyte Antigen (HLA)-DPB1 alleles in a Kenyan population.
- To investigate the extent of genetic diversity at the HLA-DPB1 locus in East Africa.
- To report novel polymorphisms, including amino acid substitutions, within HLA-DPB1.
Main Methods:
- Sequence-based typing was employed for high-resolution HLA-DPB1 allele identification.
- Molecular cloning and sequencing of identified alleles were performed for confirmation.
- Analysis focused on nucleotide and amino acid variations, particularly in exon 2.
Main Results:
- Two novel HLA-DPB1 alleles, designated DPB1*9401 and DPB1*9501, were identified in the Kenyan cohort.
- DPB1*9401 differs from DPB1*0402 by a single nucleotide substitution (CGG to TGG) at codon 70, resulting in an Arg to Trp amino acid change.
- This represents the first reported polymorphism at codon 70 of HLA-DPB1 alleles.
- DPB1*9501 exhibited new codon combinations, further indicating locus diversity.
Conclusions:
- High-resolution sequence-based typing is effectively revealing extensive HLA-DPB1 diversity in East African populations.
- The discovery of novel alleles and polymorphisms, such as the codon 70 substitution, enriches the understanding of HLA genetic variation.
- These findings contribute to the global catalog of HLA alleles and have implications for population genetics and future immunological studies.
More Related Videos
Related Concept Videos
02:26Comparing Copy Number Variations and SNPs
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
01:05Single Nucleotide Polymorphisms-SNPs
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...