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1f8a, resolution 1.84Å ()
Non-Standard Residues:
Activity: Peptidylprolyl isomerase, with EC number
Related: 1pin
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml



Publication Abstract from PubMed

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.[1] [2] [3]

About this Structure

1f8a is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.


  • 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
  1. 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
  2. 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
  3. 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

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