9N4B | pdb_00009n4b

RhoA GTPase R70A bound to GTPgammaS

• PDB DOI: https://doi.org/10.2210/pdb9N4B/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2025-02-02 Released: 2026-02-11 
• Deposition Author(s): Marcus, K., Mattos, C.
• Funding Organization(s): National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 
  0.247 (Depositor), 0.245 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.200 (DCC) 
• R-Value Observed: 
  0.204 (Depositor) 

Starting Model: experimental

Literature

An evolutionarily conserved salt bridge stabilizes the active site for GTP hydrolysis in Rho GTPases

Marcus, K., Schwabe, M., Knihtila, R., Mattos, C.

(null) J Biological Chem 

• DOI: https://doi.org/10.1016/j.jbc.2026.111260

Biological Assembly 1  

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

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

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 21.26 kDa 
• Atom Count: 1,451 
• Modeled Residue Count: 179 
• Deposited Residue Count: 180 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transforming protein RhoA	A	180	Homo sapiens	Mutation(s): 1  Gene Names: RHOA, ARH12, ARHA, RHO12 EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P61586 (Homo sapiens) Explore P61586  Go to UniProtKB:  P61586
PHAROS:  P61586 GTEx:  ENSG00000067560

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GSP	C [auth A]	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE C10 H16 N5 O13 P3 S XOFLBQFBSOEHOG-UUOKFMHZSA-N
SO4	D [auth A], E [auth A], F [auth A], G [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
MG	B [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free:  0.247 (Depositor), 0.245 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.200 (DCC) 
• R-Value Observed: 0.204 (Depositor) 

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.988	α = 90
b = 59.988	β = 90
c = 150.756	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2026-02-11 
Deposition Author(s): Marcus, K., Mattos, C.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, United States)	United States	1517295

Revision History  

• Version 1.0: 2026-02-11
  Type: Initial release