6epm

Ras guanine nucleotide exchange factor SOS1 (Rem-cdc25) in complex with KRAS(G12C) and fragment screening hit F1

Method: X-RAY DIFFRACTION Dmax: 106.7 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 heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain R; UniProt 1–169 Mutation:G12C, C118S, D126E, T127S, K128R Son of sevenless homolog 1 × 1 (Q07889) GOL GLYCEROL × 1 BQ5 (1-phenyl-5,6-dihydro-4~{H}-cyclopenta[c]pyrazol-3-yl)methanamine × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 6.5;277 K;Drops made from KRAS SOS1 complex (14.4 mg/ml in 5 mM Tris pH 7.5, 100mM NaCl) and reservoir solution (2.9 to 3.4 M sodium formate, 100 mM MES pH 6.5). Fragment soaked at 25 mM for one day using a 500 mM fragment stock solution in DMSO. Cryo buffer 0.1 M MES pH 6.5, 3.5 M sodium formate, 20 glycerol, 25 mM fragment Resolution 2.50 Å R-free 0.211

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 804 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 R; PDBConstruct 2–170; UniProt 1–169

Son of sevenless homolog 1

Homo sapiens

UniProt Q07889

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 heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain S; UniProt 563–1049 Mutation:K563G GTPase KRas × 1 (P01116) GOL GLYCEROL × 1 BQ5 (1-phenyl-5,6-dihydro-4~{H}-cyclopenta[c]pyrazol-3-yl)methanamine × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 6.5;277 K;Drops made from KRAS SOS1 complex (14.4 mg/ml in 5 mM Tris pH 7.5, 100mM NaCl) and reservoir solution (2.9 to 3.4 M sodium formate, 100 mM MES pH 6.5). Fragment soaked at 25 mM for one day using a 500 mM fragment stock solution in DMSO. Cryo buffer 0.1 M MES pH 6.5, 3.5 M sodium formate, 20 glycerol, 25 mM fragment Resolution 2.50 Å R-free 0.211

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.

90 other PDB entries and 115 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SOS1_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain S; PDBConstruct 1–487; UniProt 563–1049

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 6epm

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id6epm
Deposition date deposition_date2017-10-12
Structure title titleRas guanine nucleotide exchange factor SOS1 (Rem-cdc25) in complex with KRAS(G12C) and fragment screening hit F1
Keywords keywordsGuanine nucleotide exchange factor, GEF, Fragment Screen, GTPASE, SIGNALING PROTEIN; SIGNALING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier29.62
Radius of gyration Rg (electron density) rg_electron28.96
Forward intensity I(0) i085905100.00
Molecular weight molecular_weight73982.0 kDa
Excluded volume excluded_volume93179 ų
Envelope volume envelope_volume118060 ų
Hydration-shell volume shell_volume34587 ų
Envelope diameter envelope_diameter114.6
Shell Rg shell_rg35.40
Envelope Rg envelope_rg29.33
Shape Rg shape_rg28.95
Total Rg total_rg29.64
Total atoms total_atoms5215
Residues n_residues631
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 dmax106.7
Rg (real space) rg_real29.67
Rg uncertainty (real space) rg_real_error0.94
I(0) (real space) i0_real8.5910e+07
I(0) uncertainty (real space) i0_real_error1.3880e+06
Rg (reciprocal space) rg_reciprocal29.65
I(0) (reciprocal space) i0_reciprocal85900000.0000
Solution quality estimate total_estimate0.7765
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary31.6
Skewness Skewness skewness0.425
Kurtosis Kurtosis kurtosis-0.213
Angular range angular_range— – 0.2700 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha28660000.0000
Real-space data points n_real_points55
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.718; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.936; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd6epmr_
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
Domain ID domain_idd6epms_
Class classa — All alpha proteins
Fold Fold folda.117 — Ras GEF
Superfamily Superfamily superfamilya.117.1 — Ras GEF
Family Family familya.117.1.1 — Ras GEF

CATH v4.4 (3 domains)

Domain ID domain_id6epmR00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily300 — P-loop containing nucleotide triphosphate hydrolases
Domain ID domain_id6epmS01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology870 — Son of sevenless (SoS) protein; Chain S, domain 1
Homologous superfamily homologous superfamily10 — Son of sevenless (SoS) protein Chain: S domain 1
Domain ID domain_id6epmS02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology840 — Son of Sevenless (SoS) protein; Chain S, domain 2
Homologous superfamily homologous superfamily10 — Ras guanine-nucleotide exchange factors catalytic domain

8. Citations (1)

9. Files and Curves (10)