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The octamer motif is a B-lymphocyte-specific regulatory element of the HLA-DR alpha gene promoter
- Source :
- Proceedings of the National Academy of Sciences. 86:6739-6743
- Publication Year :
- 1989
- Publisher :
- Proceedings of the National Academy of Sciences, 1989.
-
Abstract
- The human class II gene, HLA-DR alpha, contains an octanucleotide sequence ATTTGCAT located approximately 40 base pairs upstream of the transcription initiation site. We have investigated the transcriptional function of the DR alpha octamer in human B-lymphoblastoid cells and non-B cells. Deletion and substitution mutagenesis of the octamer sequence greatly reduced the activity of the DR alpha promoter in both in vivo and in vitro cell-free transcription systems of B-cell origin. Conversely, these mutations did not affect promoter activity in several non-B-cell lines that express the DR alpha gene. Removal of octamer-binding proteins by in vivo titration with an octamer-containing competitor plasmid reduced DR alpha promoter activity in B-lymphoblastoid cells. These results suggest that a protein-octamer interaction, most likely involving the B-cell-specific octamer binding protein (OTF-2), is required for DR alpha promoter function in B-lymphoblastoid cells but not in non-B cells.
- Subjects :
- Transcription, Genetic
Genes, MHC Class II
Molecular Sequence Data
Regulatory Sequences, Nucleic Acid
Biology
Cell Line
Transcription (biology)
HLA-DRA
Genes, Regulator
Humans
Histone octamer
Promoter Regions, Genetic
Gene
B-Lymphocytes
Multidisciplinary
Base Sequence
Promoter
DNA, Neoplasm
HLA-DR Antigens
Transfection
Molecular biology
Class II gene
Regulatory sequence
Mutation
Chromosome Deletion
Research Article
Subjects
Details
- ISSN :
- 10916490 and 00278424
- Volume :
- 86
- Database :
- OpenAIRE
- Journal :
- Proceedings of the National Academy of Sciences
- Accession number :
- edsair.doi.dedup.....76f03bcc1b4a01791b97049e27214b90