2XPB

DISCOVERY OF CELL-ACTIVE PHENYL-IMIDAZOLE PIN1 INHIBITORS BY STRUCTURE-GUIDED FRAGMENT EVOLUTION

• PDB DOI: https://doi.org/10.2210/pdb2XPB/pdb

• Classification: ISOMERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2010-08-25 Released: 2011-01-12 
• Deposition Author(s): Potter, A., Oldfield, V., Nunns, C., Fromont, C., Ray, S., Northfield, C.J., Bryant, C.J., Scrace, S.F., Robinson, D., Matossova, N., Baker, L., Dokurno, P., Surgenor, A.E., Davis, B.E., Richardson, C.M., Murray, J.B., Moore, J.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.277 
• R-Value Work: 0.223 
• R-Value Observed: 0.225 

Starting Model: experimental

Literature

Discovery of Cell-Active Phenyl-Imidazole Pin1 Inhibitors by Structure-Guided Fragment Evolution.

Potter, A., Oldfield, V., Nunns, C., Fromont, C., Ray, S., Northfield, C.J., Bryant, C.J., Scrace, S.F., Robinson, D., Matossova, N., Baker, L., Dokurno, P., Surgenor, A.E., Davis, B.E., Richardson, C.M., Murray, J.B., Moore, J.D.

(2010) Bioorg Med Chem Lett 20: 6483

• PubMed: 20932746 
• DOI: https://doi.org/10.1016/j.bmcl.2010.09.063
• Primary Citation of Related Structures:  
  2XP3, 2XP4, 2XP5, 2XP6, 2XP7, 2XP8, 2XP9, 2XPA, 2XPB, 3ODK


• PubMed Abstract: 
  

  Pin1 is an emerging oncology target strongly implicated in Ras and ErbB2-mediated tumourigenesis. Pin1 isomerizes bonds linking phospho-serine/threonine moieties to proline enabling it to play a key role in proline-directed kinase signalling. Here we report a novel series of Pin1 inhibitors based on a phenyl imidazole acid core that contains sub-μM inhibitors. Compounds have been identified that block prostate cancer cell growth under conditions where Pin1 is essential.

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Organizational Affiliation: 

Vernalis (R&D) Ltd, Granta Park, Great Abington, Cambridge CB21 6GB, United Kingdom.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19.44 kDa 
• Atom Count: 1,295 
• Modelled Residue Count: 146 
• Deposited Residue Count: 167 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE NIMA-INTERACTING 1	A	167	Homo sapiens	Mutation(s): 1  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

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
12P	B [auth A]	DODECAETHYLENE GLYCOL C24 H50 O13 WRZXKWFJEFFURH-UHFFFAOYSA-N
4GE	C [auth A]	5-[BENZYL(METHYL)CARBAMOYL]-2-(3-CHLOROPHENYL)-1H-IMIDAZOLE-4-CARBOXYLIC ACID C19 H16 Cl N3 O3 BSLQMHNPFUHRKP-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
4GE	PDBBind:  2XPB	IC50: 2000 (nM) from 1 assay(s)
	BindingDB:  2XPB	IC50: 2000 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.277 
• R-Value Work: 0.223 
• R-Value Observed: 0.225 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.668	α = 90
b = 68.668	β = 90
c = 79.477	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-01-12 
Deposition Author(s): Potter, A., Oldfield, V., Nunns, C., Fromont, C., Ray, S., Northfield, C.J., Bryant, C.J., Scrace, S.F., Robinson, D., Matossova, N., Baker, L., Dokurno, P., Surgenor, A.E., Davis, B.E., Richardson, C.M., Murray, J.B., Moore, J.D.

Revision History  

• Version 1.0: 2011-01-12
  Type: Initial release
  
• Version 1.1: 2011-12-07
  Changes: Atomic model, Database references, Version format compliance
• Version 1.2: 2019-01-30
  Changes: Data collection, Experimental preparation, Other
• Version 1.3: 2019-02-06
  Changes: Data collection, Experimental preparation
• Version 1.4: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description