|1f8a, resolution 1.84Å ()|
STRUCTURAL BASIS FOR THE PHOSPHOSERINE-PROLINE RECOGNITION BY GROUP IV WW DOMAINS
Pin1 contains an N-terminal WW domain and a C-terminal peptidyl-prolyl cis-trans isomerase (PPIase) domain connected by a flexible linker. To address the energetic and structural basis for WW domain recognition of phosphoserine (P.Ser)/phosphothreonine (P. Thr)- proline containing proteins, we report the energetic and structural analysis of a Pin1-phosphopeptide complex. The X-ray crystal structure of Pin1 bound to a doubly phosphorylated peptide (Tyr-P.Ser-Pro-Thr-P.Ser-Pro-Ser) representing a heptad repeat of the RNA polymerase II large subunit's C-terminal domain (CTD), reveals the residues involved in the recognition of a single P.Ser side chain, the rings of two prolines, and the backbone of the CTD peptide. The side chains of neighboring Arg and Ser residues along with a backbone amide contribute to recognition of P.Ser. The lack of widespread conservation of the Arg and Ser residues responsible for P.Ser recognition in the WW domain family suggests that only a subset of WW domains can bind P.Ser-Pro in a similar fashion to that of Pin1.
Structural basis for phosphoserine-proline recognition by group IV WW domains., Verdecia MA, Bowman ME, Lu KP, Hunter T, Noel JP, Nat Struct Biol. 2000 Aug;7(8):639-43. PMID:10932246
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
[PIN1_HUMAN] Essential PPIase that regulates mitosis presumably by interacting with NIMA and attenuating its mitosis-promoting activity. Displays a preference for an acidic residue N-terminal to the isomerized proline bond. Catalyzes pSer/Thr-Pro cis/trans isomerizations. Down-regulates kinase activity of BTK. Can transactivate multiple oncogenes and induce centrosome amplification, chromosome instability and cell transformation. Required for the efficient dephosphorylation and recycling of RAF1 after mitogen activation.  
About this Structure
- Verdecia MA, Bowman ME, Lu KP, Hunter T, Noel JP. Structural basis for phosphoserine-proline recognition by group IV WW domains. Nat Struct Biol. 2000 Aug;7(8):639-43. PMID:10932246 doi:10.1038/77929
- ↑ Dougherty MK, Muller J, Ritt DA, Zhou M, Zhou XZ, Copeland TD, Conrads TP, Veenstra TD, Lu KP, Morrison DK. Regulation of Raf-1 by direct feedback phosphorylation. Mol Cell. 2005 Jan 21;17(2):215-24. PMID:15664191 doi:10.1016/j.molcel.2004.11.055
- ↑ Yu L, Mohamed AJ, Vargas L, Berglof A, Finn G, Lu KP, Smith CI. Regulation of Bruton tyrosine kinase by the peptidylprolyl isomerase Pin1. J Biol Chem. 2006 Jun 30;281(26):18201-7. Epub 2006 Apr 27. PMID:16644721 doi:10.1074/jbc.M603090200
- ↑ Lee TH, Chen CH, Suizu F, Huang P, Schiene-Fischer C, Daum S, Zhang YJ, Goate A, Chen RH, Zhou XZ, Lu KP. Death-associated protein kinase 1 phosphorylates Pin1 and inhibits its prolyl isomerase activity and cellular function. Mol Cell. 2011 Apr 22;42(2):147-59. doi: 10.1016/j.molcel.2011.03.005. Epub 2011 , Apr 14. PMID:21497122 doi:10.1016/j.molcel.2011.03.005