10DC | pdb_000010dc

H-Ras GTPase R68A bound to GppNHp

PDB DOI: https://doi.org/10.2210/pdb10DC/pdb

Classification: HYDROLASE, SIGNALING PROTEIN
Organism(s): Homo sapiens
Expression System: Escherichia coli
Mutation(s): Yes

Deposited: 2026-01-13 Released: 2026-02-11
Deposition Author(s): Knihtila, R., Marcus, K., Mattos, C.
Funding Organization(s): National Science Foundation (NSF, United States)

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.08 Å
R-Value Free:
0.215 (Depositor), 0.215 (DCC)
R-Value Work:
0.165 (Depositor), 0.165 (DCC)
R-Value Observed:
0.170 (Depositor)

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.0 of the entry. See complete history.

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

Macromolecule Content

Total Structure Weight: 19.34 kDa
Atom Count: 1,406
Modeled Residue Count: 162
Deposited Residue Count: 166
Unique protein chains: 1

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GTPase HRas	A	166	Homo sapiens	Mutation(s): 1 Gene Names: HRAS, HRAS1 EC: 3.6.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for P01112 (Homo sapiens) Explore P01112 Go to UniProtKB: P01112
PHAROS: P01112 GTEx: ENSG00000174775
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P01112
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
GNP Query on GNP Download Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER C₁₀ H₁₇ N₆ O₁₃ P₃ UQABYHGXWYXDTK-UUOKFMHZSA-N		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.08 Å
R-Value Free: 0.215 (Depositor), 0.215 (DCC)
R-Value Work: 0.165 (Depositor), 0.165 (DCC)
R-Value Observed: 0.170 (Depositor)

Space Group: P 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 69.896	α = 90
b = 69.896	β = 90
c = 33.321	γ = 90

Software Package:

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

Structure Validation

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Ligand Structure Quality Assessment

Entry History & Funding Information

Deposition Data

Released Date: 2026-02-11

Deposition Author(s):

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

Revision History (Full details and data files)

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.