Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

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

Macromolecule Content

• Total Structure Weight: 34464.02 
• Atom Count: 2316 
• Residue Count: 299 
• Unique protein chains: 1

1OIR

Imidazopyridines: a potent and selective class of Cyclin-dependent Kinase inhibitors identified through Structure-based hybridisation

• DOI: 10.2210/pdb1OIR/pdb

• Classification: KINASE
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda


• Deposited: 2003-06-24 Released: 2003-09-04 
• Deposition Author(s): Beattie, J.F., Breault, G.A., Byth, K.F., Culshaw, J.D., Ellston, R.P.A., Green, S., Minshull, C.A., Norman, R.A., Pauptit, R.A., Thomas, A.P., Jewsbury, P.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.91 Å
• R-Value Free: 0.241 
• R-Value Work: 0.204 

Literature

Imidazo[1,2-A]Pyridines: A Potent and Selective Class of Cyclin-Dependent Kinase Inhibitors Identified Through Structure-Based Hybridisation

Anderson, M., Beattie, J.F., Breault, G.A., Breed, J., Byth, K.F., Culshaw, J.D., Ellston, R.P.A., Green, S., Minshull, C.A., Norman, R.A., Pauptit, R.A., Stanway, J., Thomas, A.P., Jewsbury, P.J.

(2003) Bioorg.Med.Chem.Lett. 13: 3021

• PubMed: 12941325 
• Primary Citation of Related Structures:  
  1OIT, 1OIQ


• PubMed Abstract: 
  

High-throughput screening identified the imidazo[1,2-a]pyridine and bisanilinopyrimidine series as inhibitors of the cyclin-dependent kinase CDK4. Comparison of their experimentally-determined binding modes and emerging structure-activity trends led to the development of potent and selective imidazo[1,2-a]pyridine inhibitors for CDK4 and in particular CDK2.

---

Related Citations: 

• High-Resolution Crystal Structures of Human Cyclin-Dependent Kinase 2 with and without ATP: Bound Waters and Natural Ligand as a Guide for Inhibitor Design
  Schulze-Gahmen, U.,De Bondt, H.,Kim, S.-H.
  (1996) J.Med.Chem. 39: 4540




---

Organizational Affiliation: 

AstraZeneca, Alderley Park, Macclesfield, Cheshire SK10 4TG, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CELL DIVISION PROTEIN KINASE 2	A	299	Homo sapiens	Mutation(s): 0  Gene Names: CDK2 (CDKN2) EC: 2.7.11.22
Find proteins for P24941 (Homo sapiens) Go to Gene View: CDK2 Go to UniProtKB:  P24941

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
HDY	A	1-(DIMETHYLAMINO)-3-(4-{{4-(2-METHYLIMIDAZO[1,2-A]PYRIDIN-3-YL)PYRIMIDIN-2-YL]AMINO}PHENOXY)PROPAN-2-OL C23 H26 N6 O2 VCPXSBULBDYRLT-SFHVURJKSA-N

Modified Residues  2 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
KCX	A	L-PEPTIDE LINKING	C7 H14 N2 O4		LYS
ACE	A	NON-POLYMER	C2 H4 O		--

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
HDY	IC50: 1 - 10 nM (100) BINDINGDB
HDY	IC50: 32 nM BINDINGMOAD
HDY	IC50: 32 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.91 Å
• R-Value Free: 0.241 
• R-Value Work: 0.204 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 53.529	α = 90.00
b = 72.239	β = 90.00
c = 72.137	γ = 90.00

Software Package:

Software Name	Purpose
AMoRE	phasing
MOSFLM	data reduction
REFMAC	refinement
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-24 
• Released Date: 2003-09-04 
• Deposition Author(s): Beattie, J.F., Breault, G.A., Byth, K.F., Culshaw, J.D., Ellston, R.P.A., Green, S., Minshull, C.A., Norman, R.A., Pauptit, R.A., Thomas, A.P., Jewsbury, P.J.

Revision History 

• Version 1.0: 2003-09-04
  Type: Initial release
• Version 1.1: 2011-05-08
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance