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.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29109.17 
• Atom Count: 1880 
• Residue Count: 240 
• Unique protein chains: 1

1XTN

crystal structure of CISK-PX domain with sulfates

• DOI: 10.2210/pdb1XTN/pdb

• Classification: TRANSFERASE
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21


• Deposited: 2004-10-22 Released: 2004-11-02 
• Deposition Author(s): Xing, Y., Liu, D., Zhang, R., Joachimiak, A., Songyang, Z., Xu, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.240 
• R-Value Work: 0.200 

Literature

Structural basis of membrane targeting by the Phox homology domain of cytokine-independent survival kinase (CISK-PX)

Xing, Y., Liu, D., Zhang, R., Joachimiak, A., Songyang, Z., Xu, W.

(2004) J.Biol.Chem. 279: 30662-30669

• PubMed: 15126499 
• DOI: 10.1074/jbc.M404107200
• Primary Citation of Related Structures:  
  1XTE


• PubMed Abstract: 
  

The cytokine-independent survival kinase (CISK) in the serum and glucocorticoid-regulated kinase family plays an important role in mediating cell growth and survival. N-terminal to its catalytic kinase domain, CISK contains a phox homology (PX) domain, a phosphoinositide-binding motif that directs the membrane localization of CISK and regulates CISK activity. We have determined the crystal structures of the mouse CISK-PX domain to unravel the structural basis of membrane targeting of CISK. In addition to the specific interactions conferred by the phosphoinositide-binding pocket, the structure suggests that a hydrophobic loop region and a hydrophilic beta-turn contribute to the interactions with the membrane. Furthermore, biochemical studies reveal that CISK-PX dimerizes in the presence of the linker between the PX domain and kinase domain, suggesting a multivalent mechanism in membrane localization of CISK.

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Organizational Affiliation: 

Department of Biological Structure, University of Washington, Seattle, Washington 98195-7420, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Serine/threonine-protein kinase Sgk3	A, B	120	Mus musculus	Mutation(s): 0  Gene Names: Sgk3 (Cisk, Sgkl) EC: 2.7.11.1
Find proteins for Q9ERE3 (Mus musculus) Go to UniProtKB:  Q9ERE3

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.240 
• R-Value Work: 0.200 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 114.139	α = 90.00
b = 45.002	β = 90.00
c = 59.202	γ = 90.00

Software Package:

Software Name	Purpose
AMoRE	phasing
SCALEPACK	data scaling
HKL-2000	data reduction
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-10-22 
• Released Date: 2004-11-02 
• Deposition Author(s): Xing, Y., Liu, D., Zhang, R., Joachimiak, A., Songyang, Z., Xu, W.

Revision History 

• Version 1.0: 2004-11-02
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-01-24
  Type: Database references, Structure summary