The complete genomic sequence of 424,015 bp at the centromeric end of the HLA class I region: Gene content and polymorphism
AUTOR(ES)
Guillaudeux, Thierry
FONTE
The National Academy of Sciences
RESUMO
We report here the genomic sequence of the centromeric portion of HLA class I, extending 424,015 bp from tumor necrosis factor α to a newly identified gene ≈20 kb telomeric of Otf-3. As a source of DNA, we used cosmids centromeric of HLA-B that had been mapped previously with conventional restriction digestion and fingerprinting and previously characterized yeast artificial chromosomes subcloned into cosmids and mapped with multiple complete digest methodologies. The data presented provide a description of the gene content of centromeric HLA class I including new data on intron, promoter and flanking sequences of previously described genes, and a description of putative new genes that remain to be characterized beyond the structural information uncovered. A complete accounting of the repeat structure including abundant di-, tri-, and tetranucleotide microsatellite loci yielded access to precisely localized mapping tools for the major histocompatibility complex. Comparative analysis of a highly polymorphic region between HLA-B and -C was carried out by sequencing over 40 kb of overlapping sequence from two haplotypes. The levels of variation observed were much higher than those seen in other regions of the genome and indeed were higher than those observed between allelic HLA class I loci.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=21366Documentos Relacionados
- Complete nucleotide sequence of a functional class I HLA gene, HLA-A3: implications for the evolution of HLA genes.
- Molecular dynamics of MHC genesis unraveled by sequence analysis of the 1,796,938-bp HLA class I region
- The uteroglobin gene region: hormonal regulation, repetitive elements and complete nucleotide sequence of the gene.
- CpG islands and HTF islands in the HLA class I region: investigation of the methylation status of class I genes leads to precise physical mapping of the HLA-B and -C genes.
- Complete nucleotide sequence of a gene encoding a functional human class I histocompatibility antigen (HLA-CW3).