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Complete cDNA coding sequence of the HLA-DRB1*1405 allele.
Hitoshi Kohsaka1, Kimio Nasu, Sho Matsushita
1Department of Bioregulatory Medicine and Rheumatology, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan. kohsaka.rheu@tmd.ac.jp
DNA Sequence : the Journal of DNA Sequencing and Mapping
|March 26, 2003
Summary
We report the first cloning of the HLA-DRB1*1405 gene sequence. This research identifies distinct groups within the cytoplasmic domain sequences of DRB1 genes, suggesting potential functional differences in antigen presentation.
Area of Science:
- Immunogenetics
- Molecular Biology
- Human Leukocyte Antigen (HLA) research
Background:
- The complete coding region sequence for HLA-DRB1*1405 has not been previously reported in scientific literature.
- Human Leukocyte Antigen (HLA) class II genes play a crucial role in immune responses, including antigen presentation.
- Differential activation of antigen-presenting cells is known to occur with different MHC class II gene products.
Purpose of the Study:
- To clone and sequence the complete coding region of the HLA-DRB1*1405 gene.
- To analyze the sequence data in comparison to other known DRB1 genes.
- To investigate potential functional implications of observed sequence variations in the cytoplasmic domain.
Main Methods:
- Isolation and sequencing of the HLA-DRB1*1405 gene from a B cell line with a known DRB1*1405/1502 genotype.
- Bioinformatic analysis comparing the novel sequence with publicly available DRB1 gene sequences.
- Categorization of DRB1 cytoplasmic domain sequences into distinct groups based on sequence homology.
Main Results:
- The complete coding region of HLA-DRB1*1405 was successfully isolated and sequenced.
- Sequence comparison revealed that cytoplasmic domain sequences of DRB1 genes can be classified into three distinct groups.
- The identified sequence provides a new reference for HLA-DRB1 allelic variations.
Conclusions:
- The cloning of HLA-DRB1*1405 provides essential sequence data previously missing from the literature.
- The classification of DRB1 cytoplasmic domains into three groups highlights potential structural and functional divergence among alleles.
- Further functional studies are warranted to determine the significance of these allelic differences in antigen presentation and immune cell activation.