4ej1

Binding of Nb113 camelid antibody fragment with the binary DHFR:folate complex

Method: X-RAY DIFFRACTION Dmax: 101.0 Å Quality: REASONABLE

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 heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–159 Not recorded Nb113 camelid antibody fragment × 1 FOL FOLIC ACID × 1 PO4 PHOSPHATE ION × 3 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 4.4;293 K;30% PEG1000, 100 mM phosphate/citrate, 110 mM Lithium Citrate, pH 4.4, VAPOR DIFFUSION, SITTING DROP, temperature 293K Resolution 1.75 Å R-free 0.224
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 1–159 Not recorded Nb113 camelid antibody fragment × 1 FOL FOLIC ACID × 1 PO4 PHOSPHATE ION × 3 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 4.4;293 K;30% PEG1000, 100 mM phosphate/citrate, 110 mM Lithium Citrate, pH 4.4, VAPOR DIFFUSION, SITTING DROP, temperature 293K Resolution 1.75 Å R-free 0.224

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 155 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 Author chain B; 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 4ej1

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4ej1
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2. Structure Basics 2. Structure Basics

Entry ID entry_id4ej1
Deposition date deposition_date2012-04-06
Structure title titleBinding of Nb113 camelid antibody fragment with the binary DHFR:folate complex
Keywords keywordsFOLATE, Oxidoreductase-Immune system complex; Oxidoreductase/Immune system
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier29.07
Radius of gyration Rg (electron density) rg_electron28.96
Forward intensity I(0) i073111300.00
Molecular weight molecular_weight64587.0 kDa
Excluded volume excluded_volume79466 ų
Envelope volume envelope_volume98227 ų
Hydration-shell volume shell_volume29693 ų
Envelope diameter envelope_diameter104.2
Shell Rg shell_rg34.48
Envelope Rg envelope_rg28.92
Shape Rg shape_rg28.90
Total Rg total_rg29.60
Total atoms total_atoms4541
Residues n_residues570
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 dmax101.0
Rg (real space) rg_real29.24
Rg uncertainty (real space) rg_real_error0.81
I(0) (real space) i0_real7.3110e+07
I(0) uncertainty (real space) i0_real_error1.1600e+06
Rg (reciprocal space) rg_reciprocal29.17
I(0) (reciprocal space) i0_reciprocal73110000.0000
Solution quality estimate total_estimate0.6249
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary31.2
Skewness Skewness skewness0.550
Kurtosis Kurtosis kurtosis-0.003
Angular range angular_range— – 0.2750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha19060000.0000
Real-space data points n_real_points56
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.779; Stabil: 1.000; Sysdev: 0.062; Positv: 1.000; Valcen: 0.816; Smooth: 0.781

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (6 domains)

Domain ID domain_idd4ej1a_
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_idd4ej1b_
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_idd4ej1c1
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)
Domain ID domain_idd4ej1c2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags
Domain ID domain_idd4ej1d1
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)
Domain ID domain_idd4ej1d2
Class classl — Artifacts
Fold Fold foldl.1 — Tags
Superfamily Superfamily superfamilyl.1.1 — Tags
Family Family familyl.1.1.1 — Tags

CATH v4.4 (4 domains)

Domain ID domain_id4ej1A00
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_id4ej1B00
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_id4ej1C00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id4ej1D00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (1)

9. Files and Curves (10)