4NW6

Rsk2 N-terminal kinase in complex with 2-amino-7-substituted benzoxazole compound 27

• PDB DOI:  https://doi.org/10.2210/pdb4NW6/pdb

• Classification: TRANSFERASE/TRANSFERASE INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2013-12-05 Released: 2014-02-19 
• Deposition Author(s): Appleton, B.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.74 Å
• R-Value Free: 0.201 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 

Literature

2-Amino-7-substituted benzoxazole analogs as potent RSK2 inhibitors.

Costales, A., Mathur, M., Ramurthy, S., Lan, J., Subramanian, S., Jain, R., Atallah, G., Setti, L., Lindvall, M., Appleton, B.A., Ornelas, E., Feucht, P., Warne, B., Doyle, L., Basham, S.E., Aronchik, I., Jefferson, A.B., Shafer, C.M.

(2014) Bioorg Med Chem Lett 24: 1592-1596

• PubMed: 24534486 
• DOI: https://doi.org/10.1016/j.bmcl.2014.01.058
• Primary Citation of Related Structures:  
  4NW5, 4NW6


• PubMed Abstract: 
  

  2-Amino-7-substituted benzoxazole analogs were identified by HTS as inhibitors of RSK2. Molecular modeling and medicinal chemistry techniques were employed to explore the SAR for this series with a focus of improving in vitro and target modulation potency and physicochemical properties.

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Organizational Affiliation: 

Global Discovery Chemistry/Oncology & Exploratory Chemistry, Novartis Institutes for Biomedical Research, 4560 Horton Street, Emeryville, CA 94608, USA. Electronic address: [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: 37.62 kDa 
• Atom Count: 2,815 
• Modelled Residue Count: 302 
• Deposited Residue Count: 323 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribosomal protein S6 kinase alpha-3	A	323	Homo sapiens	Mutation(s): 0  Gene Names: RPS6KA3, ISPK1, MAPKAPK1B, RSK2 EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for P51812 (Homo sapiens) Explore P51812  Go to UniProtKB:  P51812
PHAROS:  P51812

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
2NS	B [auth A]	7-(1H-benzimidazol-7-yl)-N-(3,4,5-trimethoxyphenyl)-1,3-benzoxazol-2-amine C23 H20 N4 O4 ZWUCWBYYVLQXEP-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
2NS	Binding MOAD:  4NW6	IC50: 4 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.74 Å
• R-Value Free: 0.201 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.87	α = 90
b = 60.53	β = 90
c = 112.24	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-02-19 
Deposition Author(s): Appleton, B.A.

Revision History  

• Version 1.0: 2014-02-19
  Type: Initial release
  
• Version 1.1: 2014-10-08
  Changes: Database references