Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: equilibrium centrifugation

Macromolecule Content

• Total Structure Weight: 96.84 kDa 
• Atom Count: 6,506 
• Modelled Residue Count: 788 
• Deposited Residue Count: 830 
• Unique protein chains: 1

 5BML

ROCK 1 bound to a pyridine thiazole inhibitor

• PDB DOI: 10.2210/pdb5BML/pdb

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


• Deposited: 2015-05-22 Released: 2015-06-10 
• Deposition Author(s): Jacobs, M.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.95 Å
• R-Value Free: 0.235 
• R-Value Work: 0.205 
• R-Value Observed: 0.207 

Literature

Design, Synthesis, and Structure-Activity Relationships of Pyridine-Based Rho Kinase (ROCK) Inhibitors.

Green, J., Cao, J., Bandarage, U.K., Gao, H., Court, J., Marhefka, C., Jacobs, M., Taslimi, P., Newsome, D., Nakayama, T., Shah, S., Rodems, S.

(2015) J Med Chem 58: 5028-5037

• PubMed: 26039570 
• DOI: 10.1021/acs.jmedchem.5b00424
• Primary Citation of Related Structures:  
  4YVC, 4YVE, 5BML


• PubMed Abstract: 
  

The Rho kinases (ROCK1 and ROCK2) are highly homologous serine/threonine kinases that act on substrates associated with cellular motility, morphology, and contraction and are of therapeutic interest in diseases associated with cellular migration and contraction, such as hypertension, glaucoma, and erectile dysfunction. Beginning with compound 4, an inhibitor of ROCK1 identified through high-throughput screening, systematic exploration of SAR, and application of structure-based design, led to potent and selective ROCK inhibitors. Compound 37 represents significant improvements in inhibition potency, kinase selectivity, and CYP inhibition and possesses pharmacokinetics suitable for in vivo experimentation.

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Related Citations: 

• 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

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Organizational Affiliation: 

‡Vertex Pharmaceuticals, Inc., 11010 Torreyana Road, San Diego, California 92121, United States.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Rho-associated protein kinase 1	A, B	415	Homo sapiens	Mutation(s): 0  Gene Names: ROCK1 EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q13464 (Homo sapiens) Explore Q13464  Go to UniProtKB:  Q13464
PHAROS:  Q13464

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
4TW	C [auth A], D [auth B]	N-[4-(2-fluoropyridin-4-yl)thiophen-2-yl]-2-{3-[(methylsulfonyl)amino]phenyl}acetamide C18 H16 F N3 O3 S2 IVWXFGRLNHCKNV-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
4TW	BindingDB:  5BML	Ki: 10 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.95 Å
• R-Value Free: 0.235 
• R-Value Work: 0.205 
• R-Value Observed: 0.207 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 182.59	α = 90
b = 182.59	β = 90
c = 91.39	γ = 120

Software Package:

Software Name	Purpose
BUSTER-TNT	refinement
CNS	refinement
CrystalClear	data scaling
CrystalClear	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-06-10 
Deposition Author(s): Jacobs, M.D.

Revision History  

• Version 1.0: 2015-06-10
  Type: Initial release
  
• Version 1.1: 2015-06-17
  Changes: Database references
• Version 1.2: 2015-07-08
  Changes: Database references
• Version 1.3: 2015-09-30
  Changes: Data collection
• Version 1.4: 2016-04-06
  Changes: Source and taxonomy
• Version 1.5: 2017-11-01
  Changes: Author supporting evidence, Derived calculations