3NRM | pdb_00003nrm

Imidazo[1,2-a]pyrazine-based Aurora Kinase Inhibitors

• PDB DOI: https://doi.org/10.2210/pdb3NRM/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): Yes 


• Deposited: 2010-06-30 Released: 2010-08-18 
• Deposition Author(s): Hruza, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.05 Å
• R-Value Free: 
  0.258 (Depositor), 0.279 (DCC) 
• R-Value Work: 
  0.220 (Depositor), 0.233 (DCC) 
• R-Value Observed: 
  0.223 (Depositor) 

Starting Model: experimental

Literature

Discovery of imidazo[1,2-a]pyrazine-based Aurora kinase inhibitors.

Belanger, D.B., Curran, P.J., Hruza, A., Voigt, J., Meng, Z., Mandal, A.K., Siddiqui, M.A., Basso, A.D., Gray, K.

(2010) Bioorg Med Chem Lett 20: 5170-5174

• PubMed: 20674350 
• DOI: https://doi.org/10.1016/j.bmcl.2010.07.008
• Primary Citation Related Structures: 
  3NRM


• PubMed Abstract: 
  

  The synthesis and structure-activity relationships (SAR) of novel, potent imidazo[1,2-a]pyrazine-based Aurora kinase inhibitors are described. The X-ray crystal structure of imidazo[1,2-a]pyrazine Aurora inhibitor 1j is disclosed. Compound 10i was identified as lead compound with a promising overall profile.

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Organizational Affiliation: 
• Department of Chemistry, Merck Research Laboratories, Cambridge, MA 02141, USA. [e-mail]

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: 32.86 kDa 
• Atom Count: 2,176 
• Modeled Residue Count: 263 
• Deposited Residue Count: 283 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase 6	A	283	Homo sapiens	Mutation(s): 2  Gene Names: AURKA, AIK, ARK1, AURA, BTAK, STK15, STK6 EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O14965 (Homo sapiens) Explore O14965  Go to UniProtKB:  O14965
PHAROS:  O14965 GTEx:  ENSG00000087586

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NRM	B [auth A]	N-(3-methylisothiazol-5-yl)-3-(1H-pyrazol-4-yl)imidazo[1,2-a]pyrazin-8-amine C13 H11 N7 S XWFNCZUACYBPGT-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.05 Å
• R-Value Free:  0.258 (Depositor), 0.279 (DCC) 
• R-Value Work:  0.220 (Depositor), 0.233 (DCC) 
• R-Value Observed: 0.223 (Depositor) 

Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.89	α = 90
b = 81.89	β = 90
c = 169.271	γ = 120

Software Package:

Software Name	Purpose
CrystalClear	data collection
BUSTER	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-08-18 
Deposition Author(s): Hruza, A.

Revision History  

• Version 1.0: 2010-08-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-09-06
  Changes: Data collection, Database references, Derived calculations, Refinement description