6obg

Ricin A chain bound to VHH antibody V8E6

Method: X-RAY DIFFRACTION Dmax: 94.9 Å Quality: EXCELLENT

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

Ricin A chain

Ricinus communis

UniProt P02879

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 40–296 Fragment:Toxin catalytic subunit, residues 40-296 VHH antibody V8E6 × 1 ZN ZINC ION × 5 CL CHLORIDE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 6;295 K;100 mM MES (pH 6.0), 170 mM zinc acetate, 6% PEG 8,000, and 0.5% ethyl acetate Resolution 2.00 Å R-free 0.218
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 40–296 Fragment:Toxin catalytic subunit, residues 40-296 VHH antibody V8E6 × 1 ZN ZINC ION × 4 CL CHLORIDE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 6;295 K;100 mM MES (pH 6.0), 170 mM zinc acetate, 6% PEG 8,000, and 0.5% ethyl acetate Resolution 2.00 Å R-free 0.218

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.

100 other PDB entries and 125 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RICI_RICCO
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–257; UniProt 40–296 Author chain B; PDBConstruct 1–257; UniProt 40–296

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 6obg

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id6obg
Deposition date deposition_date2019-03-20
Structure title titleRicin A chain bound to VHH antibody V8E6
Keywords keywordsToxin; TOXIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier30.13
Radius of gyration Rg (electron density) rg_electron29.28
Forward intensity I(0) i0116980000.00
Molecular weight molecular_weight83502.0 kDa
Excluded volume excluded_volume103460 ų
Envelope volume envelope_volume126150 ų
Hydration-shell volume shell_volume35263 ų
Envelope diameter envelope_diameter93.8
Shell Rg shell_rg37.06
Envelope Rg envelope_rg29.10
Shape Rg shape_rg29.26
Total Rg total_rg30.03
Total atoms total_atoms5855
Residues n_residues746
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 dmax94.9
Rg (real space) rg_real30.06
Rg uncertainty (real space) rg_real_error0.65
I(0) (real space) i0_real1.1700e+08
I(0) uncertainty (real space) i0_real_error1.7380e+06
Rg (reciprocal space) rg_reciprocal30.09
I(0) (reciprocal space) i0_reciprocal117000000.0000
Solution quality estimate total_estimate0.9087
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary93.1
Skewness Skewness skewness0.208
Kurtosis Kurtosis kurtosis-0.601
Angular range angular_range— – 0.2650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha22280000.0000
Real-space data points n_real_points54
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.949; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.999; Smooth: 0.963

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd6obga_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.165 — Ribosome inactivating proteins (RIP)
Superfamily Superfamily superfamilyd.165.1 — Ribosome inactivating proteins (RIP)
Family Family familyd.165.1.1 — Plant cytotoxins
Domain ID domain_idd6obgb_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.165 — Ribosome inactivating proteins (RIP)
Superfamily Superfamily superfamilyd.165.1 — Ribosome inactivating proteins (RIP)
Family Family familyd.165.1.1 — Plant cytotoxins
Domain ID domain_idd6obgc_
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_idd6obgd_
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 (4 domains)

Domain ID domain_id6obgA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology420 — Ricin (A subunit); domain 1
Homologous superfamily homologous superfamily10 — Ricin (A subunit), domain 1
Domain ID domain_id6obgA02
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology470 — Ricin (A Subunit), domain 2
Homologous superfamily homologous superfamily10 — Ricin (A Subunit), domain 2
Domain ID domain_id6obgB01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology420 — Ricin (A subunit); domain 1
Homologous superfamily homologous superfamily10 — Ricin (A subunit), domain 1
Domain ID domain_id6obgB02
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology470 — Ricin (A Subunit), domain 2
Homologous superfamily homologous superfamily10 — Ricin (A Subunit), domain 2

8. Citations (1)

9. Files and Curves (10)