1rx3

DIHYDROFOLATE REDUCTASE (E.C.1.5.1.3) COMPLEXED WITH METHOTREXATE AND NICOTINAMIDE ADENINE DINUCLEOTIDE PHOSPHATE (REDUCED FORM)

Method: X-RAY DIFFRACTION Dmax: 50.9 Å Quality: GOOD

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

DIHYDROFOLATE REDUCTASE

Escherichia coli

UniProt P0ABQ4

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 1–159 Not recorded MN MANGANESE (II) ION × 1 MTX METHOTREXATE × 1 BME BETA-MERCAPTOETHANOL × 1 NAP NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:pH 7;pH 7.0 Resolution 2.20 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.

141 other PDB entries and 156 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name DYR_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–159; UniProt 1–159

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 1rx3

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1rx3
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1rx3
Deposition date deposition_date1996-09-19
Structure title titleDIHYDROFOLATE REDUCTASE (E.C.1.5.1.3) COMPLEXED WITH METHOTREXATE AND NICOTINAMIDE ADENINE DINUCLEOTIDE PHOSPHATE (REDUCED FORM)
Keywords keywordsOXIDOREDUCTASE, NADP, TRIMETHOPRIM RESISTANCE, METHOTREXATE RESISTANCE, ONE-CARBON METABOLISM; OXIDOREDUCTASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier16.59
Radius of gyration Rg (electron density) rg_electron15.20
Forward intensity I(0) i07645120.00
Molecular weight molecular_weight19275.0 kDa
Excluded volume excluded_volume23659 ų
Envelope volume envelope_volume26319 ų
Hydration-shell volume shell_volume14509 ų
Envelope diameter envelope_diameter51.5
Shell Rg shell_rg21.18
Envelope Rg envelope_rg15.55
Shape Rg shape_rg15.19
Total Rg total_rg16.27
Total atoms total_atoms1351
Residues n_residues159
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 dmax50.9
Rg (real space) rg_real16.46
Rg uncertainty (real space) rg_real_error0.25
I(0) (real space) i0_real7.6450e+06
I(0) uncertainty (real space) i0_real_error9.1840e+04
Rg (reciprocal space) rg_reciprocal16.48
I(0) (reciprocal space) i0_reciprocal7645000.0000
Solution quality estimate total_estimate0.8228
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary21.8
Skewness Skewness skewness0.122
Kurtosis Kurtosis kurtosis-0.424
Angular range angular_range— – 0.4800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1603000.0000
Real-space data points n_real_points78
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.903; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.987; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1rx3a_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.71 — Dihydrofolate reductase-like
Superfamily Superfamily superfamilyc.71.1 — Dihydrofolate reductase-like
Family Family familyc.71.1.1 — Dihydrofolate reductases

CATH v4.4 (1 domains)

Domain ID domain_id1rx3A00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology430 — Dihydrofolate Reductase, subunit A
Homologous superfamily homologous superfamily10 — Dihydrofolate Reductase, subunit A

8. Citations (4)

9. Files and Curves (10)