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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Slaughter, C. A. Goldstein, J. L. Gil, G. Smith, J. R. Brown, M. S. Orth, K. Osborne, T. F. |
| Description | Author Affiliation: Gil G ( Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas 75235.); |
| Abstract | DNA-binding proteins of the nuclear factor 1 (NF1) family recognize sequences containing TGG. Two of these proteins, termed reductase promoter factor (RPF) proteins A and B, bind to the promoter for hamster 3-hydroxy-3-methylglutaryl-coenzyme A reductase, a negatively regulated enzyme in cholesterol biosynthesis. In the current study, we determined the sequences of peptides derived from hamster RPF proteins A and B and used this information to isolate a cDNA, designated pNF1/Red1, that encodes RPF protein B. The peptide sequence of RPF protein A, the other reductase-related protein, suggests that it is the hamster equivalent of NF1/L, which was previously cloned from rat liver. We also isolated a hamster cDNA for an additional member of the NF1 family, designated NF1/X. Thus, the hamster genome contains at least three genes for NF1-like proteins. It is likely to contain a fourth gene, corresponding to NF1/CTF, which was previously cloned from the human. The NH2-terminal sequences of all four NF1-like proteins (NF1/Red1, NF1/L, NF1/X, and NF1/CTF), which are virtually identical, contain the DNA-binding domain that recognizes TGG. Functional diversity may arise from differences in the COOH-terminal sequences. We hypothesize that the COOH-terminal domain interacts with adjacent DNA-binding proteins, thereby stabilizing the binding of a particular NF1-like protein to a particular promoter. This protein-protein interaction confers specificity to a class of proteins whose DNA-recognition sequence is widespread in the genome. Sterols may repress transcription of the reductase gene by disrupting this protein-protein interaction. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 23 |
| Volume Number | 85 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1988-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CCAAT-Enhancer-Binding Proteins DNA-Binding Proteins Genetics Genes Hydroxymethylglutaryl CoA Reductases Promoter Regions, Genetic Transcription Factors Amino Acid Sequence Animals Cloning, Molecular Cricetinae Gene Expression Regulation Liver Metabolism Mesocricetus Molecular Sequence Data NFI Transcription Factors Nuclear Proteins Transcription, Genetic Y-Box-Binding Protein 1 Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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