title: Transcriptional regulation of HLA-DRA gene.
abstract: Transcriptional regulation of class II genes is complex. DRA, for example, is expressed in both tissue-specific and lymphokine-inducible fashion. High levels of expression in B and activated T cells depend upon a lymphoid-specific transcriptional enhancer located in the first intron and on the upstream and downstream promoter elements. Conserved upstream promoter Z and X sequences (CUS) are the main determinants of this complex regulation. At least four distinct trans-acting factors that might be differentially expressed in various cell types bind to these Z and X boxes. These are members of JUN, helix-loop-helix (HLH), C/EBP and ETS families of proteins.
authors.affiliation: Howard Hughes Medical Institute, University of California, San Francisco 94143.
authors.forename: B M
authors.initials: BM
authors.lastname: Peterlin
mesh_terms: D001402:B-Lymphocytes / Q000276:immunology; D001483:Base Sequence; D004268:DNA-Binding Proteins / Q000235:genetics; D005786:Gene Expression Regulation / Q000235:genetics; D006684:HLA-DR Antigens / Q000235:genetics*; D006801:Humans; D008969:Molecular Sequence Data; D013601:T-Lymphocytes / Q000276:immunology; D014158:Transcription, Genetic
chemical_list: D004268:DNA-Binding Proteins; D006684:HLA-DR Antigens