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1a38

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{{STRUCTURE_1a38| PDB=1a38 | SCENE= }}
{{STRUCTURE_1a38| PDB=1a38 | SCENE= }}
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'''14-3-3 PROTEIN ZETA BOUND TO R18 PEPTIDE'''
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===14-3-3 PROTEIN ZETA BOUND TO R18 PEPTIDE===
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==Overview==
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14-3-3 proteins bind a variety of molecules involved in signal transduction, cell cycle regulation and apoptosis. 14-3-3 binds ligands such as Raf-1 kinase and Bad by recognizing the phosphorylated consensus motif, RSXpSXP, but must bind unphosphorylated ligands, such as glycoprotein Ib and Pseudomonas aeruginosa exoenzyme S, via a different motif. Here we report the crystal structures of the zeta isoform of 14-3-3 in complex with two peptide ligands: a Raf-derived phosphopeptide (pS-Raf-259, LSQRQRSTpSTPNVHMV) and an unphosphorylated peptide derived from phage display (R18, PHCVPRDLSWLDLEANMCLP) that inhibits binding of exoenzyme S and Raf-1. The two peptides bind within a conserved amphipathic groove on the surface of 14-3-3 at overlapping but distinct sites. The phosphoserine of pS-Raf-259 engages a cluster of basic residues (Lys49, Arg56, Arg60, and Arg127), whereas R18 binds via the amphipathic sequence, WLDLE, with its two acidic groups coordinating the same basic cluster. 14-3-3 is dimeric, and its two peptide-binding grooves are arranged in an antiparallel fashion, 30 A apart. The ability of each groove to bind different peptide motifs suggests how 14-3-3 can act in signal transduction by inducing either homodimer or heterodimer formation in its target proteins.
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==About this Structure==
==About this Structure==
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[[Category: Wang, B.]]
[[Category: Wang, B.]]
[[Category: Signal transduction]]
[[Category: Signal transduction]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 15:54:25 2008''

Revision as of 12:54, 30 June 2008

Image:1a38.png

Template:STRUCTURE 1a38

14-3-3 PROTEIN ZETA BOUND TO R18 PEPTIDE

Template:ABSTRACT PUBMED 9632691

About this Structure

1A38 is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.

Reference

14-3-3zeta binds a phosphorylated Raf peptide and an unphosphorylated peptide via its conserved amphipathic groove., Petosa C, Masters SC, Bankston LA, Pohl J, Wang B, Fu H, Liddington RC, J Biol Chem. 1998 Jun 26;273(26):16305-10. PMID:9632691

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