Biological Assembly 1  

 3D View: Structure | Electron Density | 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: 36.81 kDa 
• Atom Count: 2691 
• Modelled Residue Count: 290 
• Deposited Residue Count: 321 
• Unique protein chains: 1

2C30

Crystal Structure Of The Human P21-Activated Kinase 6

• DOI: 10.2210/pdb2C30/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2005-10-02 Released: 2006-02-08 
• Deposition Author(s): Filippakopoulos, P., Berridge, G., Bray, J., Burgess, N., Colebrook, S., Das, S., Eswaran, J., Gileadi, O., Papagrigoriou, E., Savitsky, P., Smee, C., Turnbull, A., Sundstrom, M., Arrowsmith, C., Weigelt, J., Edwards, A., von Delft, F., Knapp, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.222 
• R-Value Work: 0.197 
• R-Value Observed: 0.198 

Literature

Crystal Structures of the P21-Activated Kinases Pak4, Pak5, and Pak6 Reveal Catalytic Domain Plasticity of Active Group II Paks.

Eswaran, J., Lee, W.H., Debreczeni, J.E., Filippakopoulos, P., Turnbull, A., Fedorov, O., Deacon, S.W., Peterson, J.R., Knapp, S.

(2007) Structure 15: 201

• PubMed: 17292838 
• DOI: 10.1016/j.str.2007.01.001
• Primary Citation of Related Structures:  
  2C30, 2BVA, 2CDZ, 2F57


• PubMed Abstract: 
  

p21-activated kinases have been classified into two groups based on their domain architecture. Group II PAKs (PAK4-6) regulate a wide variety of cellular functions, and PAK deregulation has been linked to tumor development. Structural comparison of five high-resolution structures comprising all active, monophosphorylated group II catalytic domains revealed a surprising degree of domain plasticity, including a number of catalytically productive and nonproductive conformers. Rearrangements of helix alphaC, a key regulatory element of kinase function, resulted in an additional helical turn at the alphaC N terminus and a distortion of its C terminus, a movement hitherto unseen in protein kinases. The observed structural changes led to the formation of interactions between conserved residues that structurally link the glycine-rich loop, alphaC, and the activation segment and firmly anchor alphaC in an active conformation. Inhibitor screening identified six potent PAK inhibitors from which a tri-substituted purine inhibitor was cocrystallized with PAK4 and PAK5.

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Organizational Affiliation: 

University of Oxford, Structural Genomics Consortium, Botnar Research Centre, Oxford OX3 7LD, United Kingdom. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SERINE/THREONINE-PROTEIN KINASE PAK 6	A	321	Homo sapiens	Mutation(s): 0  Gene Names: PAK6, PAK5 EC: 2.7.1.37 (PDB Primary Data), 2.7.11.1 (UniProt)
Find proteins for Q9NQU5 (Homo sapiens) Explore Q9NQU5  Go to UniProtKB:  Q9NQU5
NIH Common Fund Data Resources
PHAROS:  Q9NQU5 GTEx:  ENSG00000137843

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	B [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
CL	C [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	A	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.222 
• R-Value Work: 0.197 
• R-Value Observed: 0.198 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.781	α = 90
b = 66.674	β = 90
c = 96.999	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-10-02 
• Released Date: 2006-02-08 
Deposition Author(s): Filippakopoulos, P., Berridge, G., Bray, J., Burgess, N., Colebrook, S., Das, S., Eswaran, J., Gileadi, O., Papagrigoriou, E., Savitsky, P., Smee, C., Turnbull, A., Sundstrom, M., Arrowsmith, C., Weigelt, J., Edwards, A., von Delft, F., Knapp, S.

Revision History  

• Version 1.0: 2006-02-08
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2018-01-24
  Changes: Structure summary
• Version 1.3: 2019-05-08
  Changes: Data collection, Derived calculations, Experimental preparation