3k74

Disruption of protein dynamics by an allosteric effector antibody

Method: X-RAY DIFFRACTION Dmax: 68.8 Å Quality: EXCELLENT

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

Dihydrofolate reductase

Escherichia coli K-12

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 heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–159 Not recorded Nanobody × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 8.5;298 K;40% v/v PEG300, 5% w/v PEG1000, 100 mM Tris-HCl, pH 8.5, VAPOR DIFFUSION, temperature 298K Resolution 1.95 Å R-free 0.240

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 3k74

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3k74
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3k74
Deposition date deposition_date2009-10-12
Structure title titleDisruption of protein dynamics by an allosteric effector antibody
Keywords keywords;Immunoglobulin, protein-nanobody complex, Antibiotic resistance, Methotrexate resistance, NADP, One-carbon metabolism, Oxidoreductase, Trimethoprim resistance ;; OXIDOREDUCTASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier21.65
Radius of gyration Rg (electron density) rg_electron20.74
Forward intensity I(0) i016702400.00
Molecular weight molecular_weight30517.0 kDa
Excluded volume excluded_volume38034 ų
Envelope volume envelope_volume45295 ų
Hydration-shell volume shell_volume18906 ų
Envelope diameter envelope_diameter70.3
Shell Rg shell_rg26.40
Envelope Rg envelope_rg20.74
Shape Rg shape_rg20.71
Total Rg total_rg21.62
Total atoms total_atoms2149
Residues n_residues274
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 dmax68.8
Rg (real space) rg_real21.64
Rg uncertainty (real space) rg_real_error0.41
I(0) (real space) i0_real1.6700e+07
I(0) uncertainty (real space) i0_real_error2.2750e+05
Rg (reciprocal space) rg_reciprocal21.64
I(0) (reciprocal space) i0_reciprocal16700000.0000
Solution quality estimate total_estimate0.9047
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary23.6
Skewness Skewness skewness0.305
Kurtosis Kurtosis kurtosis-0.521
Angular range angular_range— – 0.3650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha4007000.0000
Real-space data points n_real_points68
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.929; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.973; Smooth: 0.998

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3k74a_
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
Domain ID domain_idd3k74b_
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.1 — V set domains (antibody variable domain-like)

CATH v4.4 (2 domains)

Domain ID domain_id3k74A00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology430 — Dihydrofolate Reductase, subunit A
Homologous superfamily homologous superfamily10 — Dihydrofolate Reductase, subunit A
Domain ID domain_id3k74B00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (1)

9. Files and Curves (10)