4EPT

Discovery of Small Molecules that Bind to K-Ras and Inhibit Sos-mediated Activation

• PDB DOI: https://doi.org/10.2210/pdb4EPT/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2012-04-17 Released: 2012-05-23 
• Deposition Author(s): Sun, Q., Burke, J.P., Phan, J., Burns, M.C., Olejniczak, E.T., Waterson, A.G., Lee, T., Rossanese, O.W., Fesik, S.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.274 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 

Starting Model: experimental

Literature

Discovery of Small Molecules that Bind to K-Ras and Inhibit Sos-Mediated Activation.

Sun, Q., Burke, J.P., Phan, J., Burns, M.C., Olejniczak, E.T., Waterson, A.G., Lee, T., Rossanese, O.W., Fesik, S.W.

(2012) Angew Chem Int Ed Engl 51: 6140-6143

• PubMed: 22566140 
• DOI: https://doi.org/10.1002/anie.201201358
• Primary Citation of Related Structures:  
  4EPR, 4EPT, 4EPV, 4EPW, 4EPX, 4EPY

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Organizational Affiliation: 

Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 19.99 kDa 
• Atom Count: 1,482 
• Modelled Residue Count: 166 
• Deposited Residue Count: 170 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GTPase KRas	A	170	Homo sapiens	Mutation(s): 1  Gene Names: KRAS, KRAS2, RASK2 EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P01116 (Homo sapiens) Explore P01116  Go to UniProtKB:  P01116
GTEx:  ENSG00000133703

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GDP	B [auth A]	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N
0QW	D [auth A]	(2-hydroxyphenyl)(pyrrolidin-1-yl)methanethione C11 H13 N O S QIKLOVZAPGSYNO-UHFFFAOYSA-N
MG	C [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.274 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 93.055	α = 90
b = 93.055	β = 90
c = 37.202	γ = 120

Software Package:

Software Name	Purpose
PROTEUM PLUS	data collection
MOLREP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-05-23 
Deposition Author(s): Sun, Q., Burke, J.P., Phan, J., Burns, M.C., Olejniczak, E.T., Waterson, A.G., Lee, T., Rossanese, O.W., Fesik, S.W.

Revision History  

• Version 1.0: 2012-05-23
  Type: Initial release
  
• Version 1.1: 2012-07-25
  Changes: Database references
• Version 1.2: 2023-09-13
  Changes: Data collection, Database references, Derived calculations, Refinement description