4xrx

Crystal structure of a metabolic reductase with (E)-5-((1-methyl-5-oxo-2-thioxoimidazolidin-4-ylidene)methyl)pyridin-2(1H)-one

Method: X-RAY DIFFRACTION Dmax: 90.0 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 NDP NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 2 42V 5-[(E)-(1-methyl-5-oxo-2-thioxoimidazolidin-4-ylidene)methyl]pyridin-2(1H)-one × 1 X-RAY DIFFRACTION X-ray crystallization conditions:EVAPORATION;pH 5.6;293 K;10 mM NADPH and 10 mM CaCl2 in a solution of 1.75 M (NH4)2SO4 and 0.1 M NaAc (pH 5.6), VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 3.20 Å R-free 0.277

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 4xrx

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4xrx
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id4xrx
Deposition date deposition_date2015-01-21
Structure title titleCrystal structure of a metabolic reductase with (E)-5-((1-methyl-5-oxo-2-thioxoimidazolidin-4-ylidene)methyl)pyridin-2(1H)-one
Keywords keywordsoxidoreductase/oxidoreductase inhibitor, oxidoreductase-oxidoreductase inhibitor complex; oxidoreductase/oxidoreductase inhibitor
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier30.00
Radius of gyration Rg (electron density) rg_electron29.14
Forward intensity I(0) i0129280000.00
Molecular weight molecular_weight89351.0 kDa
Excluded volume excluded_volume111850 ų
Envelope volume envelope_volume144700 ų
Hydration-shell volume shell_volume41194 ų
Envelope diameter envelope_diameter96.3
Shell Rg shell_rg36.87
Envelope Rg envelope_rg28.43
Shape Rg shape_rg29.16
Total Rg total_rg29.84
Total atoms total_atoms6275
Residues n_residues776
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 dmax90.0
Rg (real space) rg_real29.83
Rg uncertainty (real space) rg_real_error0.47
I(0) (real space) i0_real1.2930e+08
I(0) uncertainty (real space) i0_real_error1.9940e+06
Rg (reciprocal space) rg_reciprocal29.90
I(0) (reciprocal space) i0_reciprocal129300000.0000
Solution quality estimate total_estimate0.9085
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary39.1
Skewness Skewness skewness0.106
Kurtosis Kurtosis kurtosis-0.530
Angular range angular_range— – 0.2650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha19480000.0000
Real-space data points n_real_points54
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.962; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.988; Smooth: 0.933

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id4xrxA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology718 — Isopropylmalate Dehydrogenase
Homologous superfamily homologous superfamily10 — Isopropylmalate Dehydrogenase
Domain ID domain_id4xrxB00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology718 — Isopropylmalate Dehydrogenase
Homologous superfamily homologous superfamily10 — Isopropylmalate Dehydrogenase

8. Citations (1)

9. Files and Curves (10)