3TCZ

Human Pin1 bound to cis peptidomimetic inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural and Kinetic Analysis of Prolyl-isomerization/Phosphorylation Cross-Talk in the CTD Code.

Zhang, M.Wang, X.J.Chen, X.Bowman, M.E.Luo, Y.Noel, J.P.Ellington, A.D.Etzkorn, F.A.Zhang, Y.

(2012) ACS Chem Biol 7: 1462-1470

  • DOI: https://doi.org/10.1021/cb3000887
  • Primary Citation of Related Structures:  
    3TCZ, 3TDB

  • PubMed Abstract: 

    The C-terminal domain (CTD) of eukaryotic RNA polymerase II is an essential regulator for RNA polymerase II-mediated transcription. It is composed of multiple repeats of a consensus sequence Tyr(1)Ser(2)Pro(3)Thr(4)Ser(5)Pro(6)Ser(7). CTD regulation of transcription is mediated by both phosphorylation of the serines and prolyl isomerization of the two prolines. Interestingly, the phosphorylation sites are typically close to prolines, and thus the conformation of the adjacent proline could impact the specificity of the corresponding kinases and phosphatases. Experimental evidence of cross-talk between these two regulatory mechanisms has been elusive. Pin1 is a highly conserved phosphorylation-specific peptidyl-prolyl isomerase (PPIase) that recognizes the phospho-Ser/Thr (pSer/Thr)-Pro motif with CTD as one of its primary substrates in vivo. In the present study, we provide structural snapshots and kinetic evidence that support the concept of cross-talk between prolyl isomerization and phosphorylation. We determined the structures of Pin1 bound with two substrate isosteres that mimic peptides containing pSer/Thr-Pro motifs in cis or trans conformations. The results unequivocally demonstrate the utility of both cis- and trans-locked alkene isosteres as close geometric mimics of peptides bound to a protein target. Building on this result, we identified a specific case in which Pin1 differentially affects the rate of dephosphorylation catalyzed by two phosphatases (Scp1 and Ssu72) that target the same serine residue in the CTD heptad repeat but have different preferences for the isomerization state of the adjacent proline residue. These data exemplify for the first time how modulation of proline isomerization can kinetically impact signal transduction in transcription regulation.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1158Homo sapiensMutation(s): 1 
Gene Names: PIN1
EC: 5.2.1.8
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
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
R2Z
Query on R2Z

Download Ideal Coordinates CCD File 
B [auth A]N~2~-({(1R,2Z)-2-[(2R)-2-(formylamino)-3-(phosphonooxy)propylidene]cyclopentyl}carbonyl)-L-argininamide
C16 H29 N6 O7 P
MJUGXILKLYSLII-VOEDMNTOSA-N
PE4
Query on PE4

Download Ideal Coordinates CCD File 
C [auth A]2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL
C16 H34 O8
PJWQOENWHPEPKI-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.228 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.389α = 90
b = 69.389β = 90
c = 79.607γ = 120
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-06-20
    Type: Initial release
  • Version 1.1: 2012-09-05
    Changes: Database references
  • Version 1.2: 2018-04-04
    Changes: Data collection
  • Version 1.3: 2024-02-28
    Changes: Data collection, Database references, Derived calculations