3iqu

From Proteopedia

Crystal Structure of human 14-3-3 sigma in Complex with Raf1 peptide (6mer)

PDB ID 3iqu

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Structural highlights

3iqu is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.05Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

1433S_HUMAN Adapter protein implicated in the regulation of a large spectrum of both general and specialized signaling pathways. Binds to a large number of partners, usually by recognition of a phosphoserine or phosphothreonine motif. Binding generally results in the modulation of the activity of the binding partner. When bound to KRT17, regulates protein synthesis and epithelial cell growth by stimulating Akt/mTOR pathway (By similarity). p53-regulated inhibitor of G2/M progression.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The Ras-RAF-MAPK pathway is overactive in many cancers and in some developmental disorders. In one of the latter, Noonan syndrome, nine activating C-RAF mutations cluster around Ser(259), a regulatory site for inhibition by 14-3-3 proteins. We show that these mutations impair binding of 14-3-3 proteins to C-RAF and alter its subcellular localization by promoting Ras-mediated plasma membrane recruitment of C-RAF. By providing biophysical binding data, the 14-3-3/C-RAFpS(259) crystal structure, and cellular analyses we present a mechanistic link between a well-described human developmental disorder and the impairment of a 14-3-3/target protein interaction. As a broader implication of these findings, modulating the C-RAFSer(259)/14-3-3 protein-protein interaction with a stabilizing small molecule may yield a novel potential approach for diseases resulting from an overactive Ras-RAF-MAPK pathway.

Impaired binding of 14-3-3 to C-RAF in Noonan Syndrome implies new approaches in diseases with increased Ras signaling.,Molzan M, Schumacher B, Ottmann C, Baljuls A, Polzien L, Weyand M, Thiel P, Rose R, Rose M, Kuhenne P, Kaiser M, Rapp UR, Kuhlmann J, Ottmann C Mol Cell Biol. 2010 Aug 2. PMID:20679480^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Molzan M, Schumacher B, Ottmann C, Baljuls A, Polzien L, Weyand M, Thiel P, Rose R, Rose M, Kuhenne P, Kaiser M, Rapp UR, Kuhlmann J, Ottmann C. Impaired binding of 14-3-3 to C-RAF in Noonan Syndrome implies new approaches in diseases with increased Ras signaling. Mol Cell Biol. 2010 Aug 2. PMID:20679480 doi:10.1128/MCB.01636-09