Structure of a carboxamine compound (26) (2-{2-[(CYCLOPROPYLCARBONYL)AMINO]PYRIDIN-4-YL}-4-METHOXYPYRIMIDINE-5-CARBOXAMIDE) to GSK3b

Experimental Data Snapshot

  • Resolution: 2.36 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.2 of the entry. See complete history


Discovery of new acylaminopyridines as GSK-3 inhibitors by a structure guided in-depth exploration of chemical space around a pyrrolopyridinone core.

Sivaprakasam, P.Han, X.Civiello, R.L.Jacutin-Porte, S.Kish, K.Pokross, M.Lewis, H.A.Ahmed, N.Szapiel, N.Newitt, J.A.Baldwin, E.T.Xiao, H.Krause, C.M.Park, H.Nophsker, M.Lippy, J.S.Burton, C.R.Langley, D.R.Macor, J.E.Dubowchik, G.M.

(2015) Bioorg Med Chem Lett 25: 1856-1863

  • DOI: https://doi.org/10.1016/j.bmcl.2015.03.046
  • Primary Citation of Related Structures:  
    4PTC, 4PTE, 4PTG

  • PubMed Abstract: 

    Glycogen synthase kinase-3 (GSK-3) has been proposed to play a crucial role in the pathogenesis of many diseases including cancer, stroke, bipolar disorders, diabetes and neurodegenerative diseases. GSK-3 inhibition has been a major area of pharmaceutical interest over the last two decades. A plethora of reports appeared recently on selective inhibitors and their co-crystal structures in GSK-3β. We identified several series of promising new GSK-3β inhibitors from a coherent design around a pyrrolopyridinone core structure. A systematic exploration of the chemical space around the central spacer led to potent single digit and sub-nanomolar GSK-3β inhibitors. When dosed orally in a transgenic mouse model of Alzheimer's disease (AD), an exemplary compound showed significant lowering of Tau phosphorylation at one of the GSK-3 phosphorylating sites, Ser396. X-ray crystallography greatly aided in validating the binding hypotheses.

  • Organizational Affiliation

    Bristol-Myers Squibb Research and Development, 5 Research Parkway, Wallingford, CT 06492, USA. Electronic address: prasanna.siva@bms.com.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glycogen synthase kinase-3 beta
A, B
441Homo sapiensMutation(s): 0 
Gene Names: GSK3B
EC: (PDB Primary Data), (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P49841 (Homo sapiens)
Explore P49841 
Go to UniProtKB:  P49841
PHAROS:  P49841
GTEx:  ENSG00000082701 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49841
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 2WG

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C15 H15 N5 O3
Binding Affinity Annotations 
IDSourceBinding Affinity
2WG BindingDB:  4PTG IC50: 5.9 (nM) from 1 assay(s)
Binding MOAD:  4PTG IC50: 5.9 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.36 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.197α = 90
b = 83.372β = 90
c = 177.416γ = 90
Software Package:
Software NamePurpose

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-08
    Type: Initial release
  • Version 1.1: 2015-06-10
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references, Derived calculations