2ERZ

Crystal Structure of c-AMP Dependent Kinase (PKA) bound to hydroxyfasudil


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of Dimeric ROCK I Reveals the Mechanism for Ligand Selectivity.

Jacobs, M.Hayakawa, K.Swenson, L.Bellon, S.Fleming, M.Taslimi, P.Doran, J.

(2006) J.Biol.Chem. 281: 260-268

  • DOI: 10.1074/jbc.M508847200
  • Primary Citation of Related Structures:  
  • Also Cited By: 4YVE, 5BML, 4YVC

  • PubMed Abstract: 
  • ROCK or Rho-associated kinase, a serine/threonine kinase, is an effector of Rho-dependent signaling and is involved in actin-cytoskeleton assembly and cell motility and contraction. The ROCK protein consists of several domains: an N-terminal region, ...

    ROCK or Rho-associated kinase, a serine/threonine kinase, is an effector of Rho-dependent signaling and is involved in actin-cytoskeleton assembly and cell motility and contraction. The ROCK protein consists of several domains: an N-terminal region, a kinase catalytic domain, a coiled-coil domain containing a RhoA binding site, and a pleckstrin homology domain. The C-terminal region of ROCK binds to and inhibits the kinase catalytic domains, and this inhibition is reversed by binding RhoA, a small GTPase. Here we present the structure of the N-terminal region and the kinase domain. In our structure, two N-terminal regions interact to form a dimerization domain linking two kinase domains together. This spatial arrangement presents the kinase active sites and regulatory sequences on a common face affording the possibility of both kinases simultaneously interacting with a dimeric inhibitory domain or with a dimeric substrate. The kinase domain adopts a catalytically competent conformation; however, no phosphorylation of active site residues is observed in the structure. We also determined the structures of ROCK bound to four different ATP-competitive small molecule inhibitors (Y-27632, fasudil, hydroxyfasudil, and H-1152P). Each of these compounds binds with reduced affinity to cAMP-dependent kinase (PKA), a highly homologous kinase. Subtle differences exist between the ROCK- and PKA-bound conformations of the inhibitors that suggest that interactions with a single amino acid of the active site (Ala215 in ROCK and Thr183 in PKA) determine the relative selectivity of these compounds. Hydroxyfasudil, a metabolite of fasudil, may be selective for ROCK over PKA through a reversed binding orientation.


    Organizational Affiliation

    Vertex Pharmaceuticals Incorporated, Cambridge, Massachusetts 02139, USA. marc_jacobs@vrtx.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase, alpha-catalytic subunit
E
351Mus musculusMutation(s): 0 
Gene Names: Prkaca (Pkaca)
EC: 2.7.11.11
Find proteins for P05132 (Mus musculus)
Go to UniProtKB:  P05132
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
cAMP-dependent protein kinase inhibitor, alpha form
I
20Oryctolagus cuniculusMutation(s): 0 
Gene Names: PKIA (PRKACN1)
Find proteins for P61926 (Oryctolagus cuniculus)
Go to Gene View: PKIA
Go to UniProtKB:  P61926
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HFS
Query on HFS

Download SDF File 
Download CCD File 
E
1-(1-HYDROXY-5-ISOQUINOLINESULFONYL)HOMOPIPERAZINE
HYDROXYFASUDIL
C14 H17 N3 O3 S
ZAVGJDAFCZAWSZ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
E
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
E
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
HFSKi: 2200 nM BINDINGMOAD
HFSKi: 2200 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.794α = 90.00
b = 75.751β = 90.00
c = 80.048γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
d*TREKdata processing
AMoREphasing
d*TREKdata scaling
CrystalCleardata reduction
CNXrefinement
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2005-10-25 
  • Released Date: 2005-11-08 
  • Deposition Author(s): Jacobs, M.

Revision History 

  • Version 1.0: 2005-11-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance