4o2l: Difference between revisions
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==Structure of Mus musculus Rheb G63A mutant bound to GTP== | ==Structure of Mus musculus Rheb G63A mutant bound to GTP== | ||
<StructureSection load='4o2l' size='340' side='right' caption='[[4o2l]], [[Resolution|resolution]] 2.40Å' scene=''> | <StructureSection load='4o2l' size='340' side='right' caption='[[4o2l]], [[Resolution|resolution]] 2.40Å' scene=''> | ||
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4o25|4o25]], [[4o2r|4o2r]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4o25|4o25]], [[4o2r|4o2r]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Rheb ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Rheb ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4o2l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o2l OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4o2l RCSB], [http://www.ebi.ac.uk/pdbsum/4o2l PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4o2l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o2l OCA], [http://pdbe.org/4o2l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4o2l RCSB], [http://www.ebi.ac.uk/pdbsum/4o2l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4o2l ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 4o2l" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[GTP-binding protein|GTP-binding protein]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 19:22, 5 August 2016
Structure of Mus musculus Rheb G63A mutant bound to GTPStructure of Mus musculus Rheb G63A mutant bound to GTP
Structural highlights
Function[RHEB_MOUSE] Stimulates the phosphorylation of S6K1 and EIF4EBP1 through activation of mTORC1 signaling. Activates the protein kinase activity of mTORC1. Has low intrinsic GTPase activity (By similarity). Publication Abstract from PubMedConstitutively activated variants of small GTPases, which provide valuable functional probes of their role in cellular signaling pathways, can often be generated by mutating the canonical catalytic residue (e.g. Ras Q61L) to impair GTP hydrolysis. However, this general approach is ineffective for a substantial fraction of the small GTPase family in which this residue is not conserved (e.g. Rap) or not catalytic (e.g. Rheb). Using a novel engineering approach, we have manipulated nucleotide binding through structure-guided substitutions of an ultraconserved glycine residue in the G3-box motif (DXXG). Substitution of Rheb Gly-63 with alanine impaired both intrinsic and TSC2 GTPase-activating protein (GAP)-mediated GTP hydrolysis by displacing the hydrolytic water molecule, whereas introduction of a bulkier valine side chain selectively blocked GTP binding by steric occlusion of the gamma-phosphate. Rheb G63A stimulated phosphorylation of the mTORC1 substrate p70S6 kinase more strongly than wild-type, thus offering a new tool for mammalian target of rapamycin (mTOR) signaling. Structure-guided mutation of the conserved G3-box glycine in Rheb generates a constitutively activated regulator of mammalian target of rapamycin (mTOR).,Mazhab-Jafari MT, Marshall CB, Ho J, Ishiyama N, Stambolic V, Ikura M J Biol Chem. 2014 May 2;289(18):12195-201. doi: 10.1074/jbc.C113.543736. Epub, 2014 Mar 19. PMID:24648513[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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