6mth

E. coli DHFR complex modeled with three ligand states

Method: X-RAY DIFFRACTION Dmax: 52.6 Å Quality: GOOD

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

Dihydrofolate reductase

Escherichia coli (strain K12)

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 CL CHLORIDE ION × 3 MG MAGNESIUM ION × 4 THG (6S)-5,6,7,8-TETRAHYDROFOLATE × 2 DHF DIHYDROFOLIC ACID × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;293.15 K;20 mg/ml protein working stock was prepared from 2:1 v/v mixing of 30mg/ml protein in 20mM Tris pH 8, 1mM DTT and 50mM HEPES pH 7.3, 100mM NaCl. Then the working protein stock at 20 mg/ml is mixed at 1:1 v/v ratio with reservoir solution of 0.1M MES pH 6.5, 30% PEG3350, 0.4M MgCl2 Resolution 1.35 Å R-free 0.190

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 6mth

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id6mth
Deposition date deposition_date2018-10-19
Structure title titleE. coli DHFR complex modeled with three ligand states
Keywords keywordscomplex, OXIDOREDUCTASE; OXIDOREDUCTASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier16.98
Radius of gyration Rg (electron density) rg_electron15.45
Forward intensity I(0) i06869840.00
Molecular weight molecular_weight18549.0 kDa
Excluded volume excluded_volume22934 ų
Envelope volume envelope_volume26403 ų
Hydration-shell volume shell_volume14460 ų
Envelope diameter envelope_diameter51.9
Shell Rg shell_rg21.35
Envelope Rg envelope_rg15.75
Shape Rg shape_rg15.44
Total Rg total_rg16.52
Total atoms total_atoms2535
Residues n_residues157
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 dmax52.6
Rg (real space) rg_real16.87
Rg uncertainty (real space) rg_real_error0.24
I(0) (real space) i0_real6.8700e+06
I(0) uncertainty (real space) i0_real_error7.8640e+04
Rg (reciprocal space) rg_reciprocal16.88
I(0) (reciprocal space) i0_reciprocal6870000.0000
Solution quality estimate total_estimate0.8999
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary22.8
Skewness Skewness skewness0.120
Kurtosis Kurtosis kurtosis-0.453
Angular range angular_range— – 0.4700 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1744000.0000
Real-space data points n_real_points77
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.911; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.992; Smooth: 0.968

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd6mtha1
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.71.1.0 — automated matches
Domain ID domain_idd6mtha2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (1 domains)

Domain ID domain_id6mthA00
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 (1)

9. Files and Curves (10)