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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Davé, U. P. Brown, M. S. Goldstein, J. L. Ye, J. Grishin, N. V. |
| Description | Author Affiliation: Ye J ( Department of Molecular Genetics, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9046, USA.); |
| Abstract | The NH(2)-terminal domains of membrane-bound sterol regulatory element-binding proteins (SREBPs) are released into the cytosol by regulated intramembrane proteolysis, after which they enter the nucleus to activate genes encoding lipid biosynthetic enzymes. Intramembrane proteolysis is catalyzed by Site-2 protease (S2P), a hydrophobic zinc metalloprotease that cleaves SREBPs at a membrane-embedded leucine-cysteine bond. In the current study, we use domain-swapping methods to localize the residues within the SREBP-2 membrane-spanning segment that are required for cleavage by S2P. The studies reveal a requirement for an asparagine-proline sequence in the middle third of the transmembrane segment. We propose a model in which the asparagine-proline sequence serves as an NH(2)-terminal cap for a portion of the transmembrane alpha-helix of SREBP, allowing the remainder of the alpha-helix to unwind partially to expose the peptide bond for cleavage by S2P. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 10 |
| Volume Number | 97 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2000-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CCAAT-Enhancer-Binding Proteins DNA-Binding Proteins Chemistry Metabolism Dipeptides Endopeptidases Nuclear Proteins Transcription Factors Amino Acid Sequence Animals Binding Sites Cell Line Cell Membrane Conserved Sequence Cricetinae Helix-Loop-Helix Motifs Models, Molecular Molecular Sequence Data Protein Structure, Secondary Recombinant Fusion Proteins Sequence Alignment Sequence Homology, Amino Acid Sterol Regulatory Element Binding Protein 1 Transfection 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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