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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Schaad, Martin Dames, Sonja A. Sommer, Lisa A. M. |
| Description | Author Affiliation: Sommer LA ( Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany.) |
| Abstract | The FATC domain is shared by all members of the family of phosphatidylinositol-3 kinase-related kinases (PIKKs). It has been shown that the FATC domain plays an important role for the regulation of each PIKK. However, other than an involvement in protein-protein interactions, a common principle for the action of the FATC domain has not been detected. A detailed characterization of the structure and lipid binding properties of the FATC domain of the Ser/Thr kinase target of rapamycin (TOR) revealed that it contains a redox-sensitive membrane anchor in its C terminus. Because the C-terminal regions of the FATC domains of all known PIKKs are rather hydrophobic and especially rich in aromatic residues, we examined whether the ability to interact with lipids and membranes might be a general property. Here, we present the characterization of the interactions with lipids and different membrane mimetics for the FATC domains of human DNA-PKcs, human ATM, human ATR, human SMG-1, and human TRRAP by NMR and CD spectroscopy. The data indicate that all of these can interact with different membrane mimetics and may have different preferences only for membrane properties such as surface charge, curvature, and lipid packing. The oxidized form of the TOR FATC domain is well structured overall and forms an -helix that is followed by a disulfide-bonded loop. In contrast, the FATC domains of the other PIKKs are rather unstructured in the isolated form and only significantly populate -helical secondary structure upon interaction with membrane mimetics. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 27 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-07-05 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Lipids Chemistry Membranes, Artificial Phosphatidylinositol 3-Kinases Cell Membrane Genetics Metabolism Nuclear Magnetic Resonance, Biomolecular Protein Binding Protein Structure, Secondary Protein Structure, Tertiary Structure-Activity Relationship Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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