9yhb

Cryo-EM structure of IDH1 R132H C269S

Method: ELECTRON MICROSCOPY Dmax: 90.7 Å Quality: EXCELLENT

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

Isocitrate dehydrogenase [NADP] cytoplasmic

Homo sapiens

UniProt O75874

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–414 Chain B; UniProt 1–414 Mutation:R132H, C269S NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.85 Å

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.

59 other PDB entries and 92 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name IDHC_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–414; UniProt 1–414 Author chain B; PDBConstruct 1–414; UniProt 1–414

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 9yhb

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9yhb
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9yhb
Deposition date deposition_date2025-09-30
Structure title titleCryo-EM structure of IDH1 R132H C269S
Keywords keywordsDehydrogenase, cellular metabolism, oxidative decarboxylation, CYTOSOLIC PROTEIN; CYTOSOLIC PROTEIN
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier29.98
Radius of gyration Rg (electron density) rg_electron29.14
Forward intensity I(0) i0134398000.00
Molecular weight molecular_weight91180.0 kDa
Excluded volume excluded_volume114140 ų
Envelope volume envelope_volume147060 ų
Hydration-shell volume shell_volume41738 ų
Envelope diameter envelope_diameter95.5
Shell Rg shell_rg36.93
Envelope Rg envelope_rg28.51
Shape Rg shape_rg29.15
Total Rg total_rg29.87
Total atoms total_atoms6408
Residues n_residues794
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 dmax90.7
Rg (real space) rg_real29.81
Rg uncertainty (real space) rg_real_error0.52
I(0) (real space) i0_real1.3440e+08
I(0) uncertainty (real space) i0_real_error2.0370e+06
Rg (reciprocal space) rg_reciprocal29.88
I(0) (reciprocal space) i0_reciprocal134400000.0000
Solution quality estimate total_estimate0.9076
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary39.3
Skewness Skewness skewness0.116
Kurtosis Kurtosis kurtosis-0.535
Angular range angular_range— – 0.2650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha26990000.0000
Real-space data points n_real_points54
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.955; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.988; Smooth: 0.942

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (2)

8. Citations (1)

9. Files and Curves (10)