title: Two steroid 21-hydroxylase genes are located in the murine S region.
abstract: A common inherited disorder of steroidogenesis in man, 21-hydroxylase (21-OH) deficiency, is linked to the HLA major histocompatibility complex (MHC), and is associated in particular with certain allotypes of the HLA-linked complement proteins. Recently, this disorder was demonstrated to result from a defective structural gene for the 21-OH enzyme, also termed cytochrome P-450C21. The human (HLA) and murine (H-2) MHCs are homologous in overall organization and in the structures of their component genes. To determine whether 21-OH genes are located in the H-2 complex, we have now used a bovine adrenal complementary DNA clone encoding part of 21-OH to examine a cluster of overlapping cosmid clones derived from the S region of the BALB/c mouse. We found that there are two 21-OH genes in this region, located immediately 3' to the C4 and Slp genes.
mesh_terms: D000302:Adrenal Cortex / Q000201:enzymology*; D000818:Animals; D002417:Cattle; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D005796:Genes; D008040:Genetic Linkage; D008099:Liver / Q000201:enzymology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D009693:Nucleic Acid Hybridization; D009928:Organ Specificity; D012333:RNA, Messenger / Q000235:genetics; D013045:Species Specificity; D013255:Steroid 21-Hydroxylase / Q000235:genetics*; D013250:Steroid Hydroxylases / Q000235:genetics*; D013737:Testis / Q000201:enzymology
chemical_list: D012333:RNA, Messenger; D013250:Steroid Hydroxylases; D013255:Steroid 21-Hydroxylase; D004262:DNA Restriction Enzymes