Crystal Structure Analysis of PIN1

Experimental Data Snapshot

  • Resolution: 1.59 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.154 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Arsenic targets Pin1 and cooperates with retinoic acid to inhibit cancer-driving pathways and tumor-initiating cells.

Kozono, S.Lin, Y.M.Seo, H.S.Pinch, B.Lian, X.Qiu, C.Herbert, M.K.Chen, C.H.Tan, L.Gao, Z.J.Massefski, W.Doctor, Z.M.Jackson, B.P.Chen, Y.Dhe-Paganon, S.Lu, K.P.Zhou, X.Z.

(2018) Nat Commun 9: 3069-3069

  • DOI: https://doi.org/10.1038/s41467-018-05402-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Arsenic trioxide (ATO) and all-trans retinoic acid (ATRA) combination safely cures fatal acute promyelocytic leukemia, but their mechanisms of action and efficacy are not fully understood. ATRA inhibits leukemia, breast, and liver cancer by targeting isomerase Pin1, a master regulator of oncogenic signaling networks. Here we show that ATO targets Pin1 and cooperates with ATRA to exert potent anticancer activity. ATO inhibits and degrades Pin1, and suppresses its oncogenic function by noncovalent binding to Pin1's active site. ATRA increases cellular ATO uptake through upregulating aquaporin-9. ATO and ATRA, at clinically safe doses, cooperatively ablate Pin1 to block numerous cancer-driving pathways and inhibit the growth of triple-negative breast cancer cells and tumor-initiating cells in cell and animal models including patient-derived orthotopic xenografts, like Pin1 knockout, which is substantiated by comprehensive protein and microRNA analyses. Thus, synergistic targeting of Pin1 by ATO and ATRA offers an attractive approach to combating breast and other cancers.

  • Organizational Affiliation

    Broad Institute of MIT and Harvard, Cambridge, MA, 02142, USA. xzhou@bidmc.harvard.edu.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1
A, B
122Homo sapiensMutation(s): 2 
Gene Names: PIN1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13526 (Homo sapiens)
Explore Q13526 
Go to UniProtKB:  Q13526
PHAROS:  Q13526
GTEx:  ENSG00000127445 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13526
Sequence Annotations
  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 1.59 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.154 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.27α = 90
b = 36.21β = 100.75
c = 51.59γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
xia2data scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-06
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description