PMID- 10369924 OWN - NLM STAT- MEDLINE DCOM- 19990722 LR - 20201209 IS - 0093-7711 (Print) IS - 0093-7711 (Linking) VI - 49 IP - 7-8 DP - 1999 Jul TI - The central MHC gene IKBL carries a structural polymorphism that is associated with HLA-A3,B7,DR15. PG - 660-5 AB - Susceptibility to several disorders, including insulin-dependent diabetes mellitus and multiple sclerosis, has been associated with alleles of HLA class II genes and loci in the TNF cluster in the central major histocompatibility complex (MHC) region. As recombination within this region is rare, it is difficult to determine which genes are important. This will be facilitated by the identification of functional polymorphisms. Hence we are sequencing reverse transcription-polymerase chain reaction products derived from central MHC genes in well characterized and conserved ancestral haplotypes. Here we address the IKBL gene, which lies near the TNF cluster at the telomeric end of the central MHC. Although the IKBL cDNA sequence was conserved between most ancestral haplotypes, a synonymous nucleotide substitution, a 3' untranslated region substitution, and a single nonsynonymous substitution were identified. The latter (IKBL+738) was present in multiple examples of the 7.1 haplotype [HLA-A3, B7, DR2 (DR15)] and resulted in a cysteine to arginine substitution in a predicted protein kinase C phosphorylation site. This polymorphism did not occur in 18 other common haplotypes from the 10th International Histocompatibility Workshop and thus appears haplospecific. A role for IKBL+738 in the association between HLA-A3,B7,DR2(DR15) and susceptibility to multiple sclerosis is discussed. FAU - Allcock, R J AU - Allcock RJ AD - Department of Biochemistry, University of Western Australia, Nedlands 6009, Western Australia. rallcock@dci.uwa.edu.au FAU - Christiansen, F T AU - Christiansen FT FAU - Price, P AU - Price P LA - eng SI - GENBANK/AF097419 SI - GENBANK/AF097420 SI - GENBANK/AF097421 SI - GENBANK/AF097422 SI - GENBANK/AF097423 SI - GENBANK/AF097424 SI - GENBANK/AF097425 SI - GENBANK/AF097426 SI - GENBANK/AF097427 SI - GENBANK/AF097428 SI - GENBANK/AF097429 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Immunogenetics JT - Immunogenetics JID - 0420404 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (DNA, Complementary) RN - 0 (HLA-A3 Antigen) RN - 0 (HLA-B7 Antigen) RN - 0 (HLA-DR Antigens) RN - 0 (HLA-DR Serological Subtypes) RN - 0 (HLA-DR15 antigen) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (NF-kappa B) RN - 0 (NFKBIL1 protein, human) SB - IM MH - Adaptor Proteins, Signal Transducing MH - Amino Acid Sequence MH - Base Sequence MH - Cell Line, Transformed MH - DNA, Complementary MH - HLA-A3 Antigen/*genetics MH - HLA-B7 Antigen/*genetics MH - HLA-DR Antigens/*genetics MH - HLA-DR Serological Subtypes MH - Haplotypes MH - Histocompatibility Antigens Class II/*genetics MH - Humans MH - Molecular Sequence Data MH - NF-kappa B/*genetics MH - *Polymorphism, Genetic EDAT- 1999/06/17 00:00 MHDA- 1999/06/17 00:01 CRDT- 1999/06/17 00:00 PHST- 1999/06/17 00:00 [pubmed] PHST- 1999/06/17 00:01 [medline] PHST- 1999/06/17 00:00 [entrez] AID - 90490660.251 [pii] AID - 10.1007/s002510050662 [doi] PST - ppublish SO - Immunogenetics. 1999 Jul;49(7-8):660-5. doi: 10.1007/s002510050662.