6m9w

Structure of Mg-free KRAS4b (2-169) bound to GDP with the switch-I in fully open conformation

Method: X-RAY DIFFRACTION Dmax: 60.3 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

GTPase KRas

Homo sapiens

UniProt P01116

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 2–169 Not recorded GDP GUANOSINE-5'-DIPHOSPHATE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 8.2;293 K;0.056 M NaPO4.H2O, 1.344 M K2PO4, pH 8.2 Resolution 1.50 Å R-free 0.181
2 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 2–169 Not recorded GDP GUANOSINE-5'-DIPHOSPHATE × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 8.2;293 K;0.056 M NaPO4.H2O, 1.344 M K2PO4, pH 8.2 Resolution 1.50 Å R-free 0.181

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

445 other PDB entries and 803 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RASK_HUMAN
Isoform P01116-2
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 3–170; UniProt 2–169

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 6m9w

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6m9w
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6m9w
Deposition date deposition_date2018-08-24
Structure title titleStructure of Mg-free KRAS4b (2-169) bound to GDP with the switch-I in fully open conformation
Keywords keywordsKRAS, RAS, Mg, K-RAS-4b, Small GTPase, Guanine nucleotide, ONCOPROTEIN; ONCOPROTEIN
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier17.60
Radius of gyration Rg (electron density) rg_electron16.41
Forward intensity I(0) i07739680.00
Molecular weight molecular_weight19552.0 kDa
Excluded volume excluded_volume24139 ų
Envelope volume envelope_volume28204 ų
Hydration-shell volume shell_volume14822 ų
Envelope diameter envelope_diameter58.6
Shell Rg shell_rg22.00
Envelope Rg envelope_rg16.91
Shape Rg shape_rg16.45
Total Rg total_rg17.27
Total atoms total_atoms2703
Residues n_residues168
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax60.3
Rg (real space) rg_real17.54
Rg uncertainty (real space) rg_real_error0.37
I(0) (real space) i0_real7.7400e+06
I(0) uncertainty (real space) i0_real_error8.5280e+04
Rg (reciprocal space) rg_reciprocal17.55
I(0) (reciprocal space) i0_reciprocal7740000.0000
Solution quality estimate total_estimate0.8645
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary59.5
Skewness Skewness skewness0.277
Kurtosis Kurtosis kurtosis-0.139
Angular range angular_range— – 0.4500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1443000.0000
Real-space data points n_real_points76
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.750; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.985; Smooth: 0.998

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd6m9wa_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamilyc.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family familyc.37.1.8 — G proteins

CATH v4.4 (1 domains)

Domain ID domain_id6m9wA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases

8. Citations (1)

9. Files and Curves (10)