Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 37.31 kDa 
• Atom Count: 2233 
• Modelled Residue Count: 255 
• Deposited Residue Count: 321 
• Unique protein chains: 1

2Z7Q

Crystal structure of the N-terminal kinase domain of human RSK-1 bound to AMP-PCP

• PDB DOI: 10.2210/pdb2Z7Q/pdb

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


• Deposited: 2007-08-28 Released: 2008-05-13 
• Deposition Author(s): Ikuta, M., Munshi, S.K.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.283 
• R-Value Work: 0.264 

Literature

Crystal structures of the N-terminal kinase domain of human RSK1 bound to three different ligands: Implications for the design of RSK1 specific inhibitors.

Ikuta, M., Kornienko, M., Byrne, N., Reid, J.C., Mizuarai, S., Kotani, H., Munshi, S.K.

(2007) Protein Sci 16: 2626-2635

• PubMed: 17965187 
• DOI: 10.1110/ps.073123707
• Primary Citation of Related Structures:  
  2Z7Q, 2Z7R, 2Z7S


• PubMed Abstract: 
  

The p90 ribosomal S6 kinases (RSKs) also known as MAPKAP-Ks are serine/threonine protein kinases that are activated by ERK or PDK1 and act as downstream effectors of mitogen-activated protein kinase (MAPK). RSK1, a member of the RSK family, contains two distinct kinase domains in a single polypeptide chain, the regulatory C-terminal kinase domain (CTKD) and the catalytic N-terminal kinase domain (NTKD). Autophosphorylation of the CTKD leads to activation of the NTKD that subsequently phosphorylates downstream substrates. Here we report the crystal structures of the unactivated RSK1 NTKD bound to different ligands at 2.0 A resolution. The activation loop and helix alphaC, key regulatory elements of kinase function, are disordered. The DFG motif of the inactive RSK1 adopts an "active-like" conformation. The beta-PO(4) group in the AMP-PCP complex adopts a unique conformation that may contribute to inactivity of the enzyme. Structures of RSK1 ligand complexes offer insights into the design of novel anticancer agents and into the regulation of the catalytic activity of RSKs.

---

Organizational Affiliation: 

Department of Structural Biology, Merck Research Laboratories, West Point, Pennsylvania 19486, USA. mari_ikuta@.merck.com

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribosomal protein S6 kinase alpha-1	A	321	Homo sapiens	Mutation(s): 0  Gene Names: RPS6KA1, RSK1, MAPKAPK1A EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q15418 (Homo sapiens) Explore Q15418  Go to UniProtKB:  Q15418
PHAROS:  Q15418

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ACP	C [auth A]	PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER C11 H18 N5 O12 P3 UFZTZBNSLXELAL-IOSLPCCCSA-N
MG	B [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.283 
• R-Value Work: 0.264 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52.194	α = 90
b = 53.685	β = 90
c = 119.874	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
CNX	refinement
HKL-2000	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-08-28 
• Released Date: 2008-05-13 
Deposition Author(s): Ikuta, M., Munshi, S.K.

Revision History  

• Version 1.0: 2008-05-13
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2012-02-15
  Changes: Non-polymer description