4NUS

Rsk2 N-terminal kinase in complex with LJH685


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Novel potent and selective inhibitors of p90 ribosomal S6 kinase reveal the heterogeneity of RSK function in MAPK-driven cancers.

Aronchik, I.Appleton, B.A.Basham, S.E.Crawford, K.Del Rosario, M.Doyle, L.V.Estacio, W.F.Lan, J.Lindvall, M.K.Luu, C.A.Ornelas, E.Venetsanakos, E.Shafer, C.M.Jefferson, A.B.

(2014) Mol Cancer Res 12: 803-812

  • DOI: 10.1158/1541-7786.MCR-13-0595
  • Also Cited By: 5D9L, 5D9K

  • PubMed Abstract: 
  • The p90 ribosomal S6 kinase (RSK) family of serine/threonine kinases is expressed in a variety of cancers and its substrate phosphorylation has been implicated in direct regulation of cell survival, proliferation, and cell polarity. This study charac ...

    The p90 ribosomal S6 kinase (RSK) family of serine/threonine kinases is expressed in a variety of cancers and its substrate phosphorylation has been implicated in direct regulation of cell survival, proliferation, and cell polarity. This study characterizes and presents the most selective and potent RSK inhibitors known to date, LJH685 and LJI308. Structural analysis confirms binding of LJH685 to the RSK2 N-terminal kinase ATP-binding site and reveals that the inhibitor adopts an unusual nonplanar conformation that explains its excellent selectivity for RSK family kinases. LJH685 and LJI308 efficiently inhibit RSK activity in vitro and in cells. Furthermore, cellular inhibition of RSK and its phosphorylation of YB1 on Ser102 correlate closely with inhibition of cell growth, but only in an anchorage-independent growth setting, and in a subset of examined cell lines. Thus, RSK inhibition reveals dynamic functional responses among the inhibitor-sensitive cell lines, underscoring the heterogeneous nature of RSK dependence in cancer.


    Organizational Affiliation

    Authors' Affiliations: Novartis Institutes for BioMedical Research, Emeryville, California; and 2Shanghai Haiyan Pharmaceutical Technology Co., Ltd., Shanghai.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribosomal protein S6 kinase alpha-3
A
323Homo sapiensMutation(s): 0 
Gene Names: RPS6KA3 (ISPK1, MAPKAPK1B, RSK2)
EC: 2.7.11.1
Find proteins for P51812 (Homo sapiens)
Go to Gene View: RPS6KA3
Go to UniProtKB:  P51812
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2NK
Query on 2NK

Download SDF File 
Download CCD File 
A
2,6-difluoro-4-{4-[4-(4-methylpiperazin-1-yl)phenyl]pyridin-3-yl}phenol
C22 H21 F2 N3 O
IKUFKDGKRLMXEX-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
2NKIC50: 5 nM (100) BINDINGDB
2NKIC50: 5 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.189 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 52.271α = 90.00
b = 62.812β = 90.00
c = 117.244γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
PROCESSdata scaling
PROCESSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-12-04 
  • Released Date: 2014-03-05 
  • Deposition Author(s): Appleton, B.A.

Revision History 

  • Version 1.0: 2014-03-05
    Type: Initial release
  • Version 1.1: 2014-11-12
    Type: Database references