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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Vyas, Nand K. Quiocho, Florante A. Zhang, Wei Sankaran, Banumathi Sippel, Katherine H. |
| Description | Author Affiliation: Sippel KH ( From the Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas 77030 and.); Vyas NK ( From the Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas 77030 and.); Zhang W ( From the Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas 77030 and.); Sankaran B ( the Berkeley Center for Structural Biology, Lawrence Berkeley National Laboratory, Berkeley, California 94720.); Quiocho FA ( From the Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, Texas 77030 and faq@bcm.edu.) |
| Abstract | Human fatty acid synthase (FAS) is a large, multidomain protein that synthesizes long chain fatty acids. Because these fatty acids are primarily provided by diet, FAS is normally expressed at low levels; however, it is highly up-regulated in many cancers. Human enoyl-acyl carrier protein-reductase (hER) is one of the FAS catalytic domains, and its inhibition by drugs like triclosan (TCL) can increase cytotoxicity and decrease drug resistance in cancer cells. We have determined the structure of hER in the presence and absence of TCL. TCL was not bound in the active site, as predicted, but rather at the protein-protein interface (PPI). TCL binding induces a dimer orientation change that causes downstream structural rearrangement in critical active site residues. Kinetics studies indicate that TCL is capable of inhibiting the isolated hER domain with an IC50 of â ¼ 55 µM. Given the hER-TCL structure and the inhibition observed in the hER domain, it seems likely that TCL is observed in the physiologically relevant binding site and that it acts as an allosteric PPI inhibitor. TCL may be a viable scaffold for the development of anti-cancer PPI FAS inhibitors. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 48 |
| Volume Number | 289 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2014-11-28 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Enoyl-(Acyl-Carrier-Protein) Reductase (NADH) Chemistry Fatty Acid Synthases Fatty Acid Synthesis Inhibitors Triclosan Allosteric Regulation Crystallography, X-Ray Kinetics Protein Structure, Tertiary Structure-Activity Relationship Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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