6obo

Ricin A chain bound to VHH antibody V6A6

Method: X-RAY DIFFRACTION Dmax: 92.9 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 40-298 VHH antibody V6A6 × 1 EDO 1,2-ETHANEDIOL × 1 ACY ACETIC ACID × 3 CA CALCIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 8;100 mM imidazole (pH 8.0), 200 mM calcium acetate, and 15% PEG 8,000 Resolution 1.90 Å R-free 0.244
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 40-298 VHH antibody V6A6 × 1 EDO 1,2-ETHANEDIOL × 2 ACY ACETIC ACID × 3 CA CALCIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 8;100 mM imidazole (pH 8.0), 200 mM calcium acetate, and 15% PEG 8,000 Resolution 1.90 Å R-free 0.244

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 6obo

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id6obo
Deposition date deposition_date2019-03-21
Structure title titleRicin A chain bound to VHH antibody V6A6
Keywords keywordsToxin; TOXIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier29.22
Radius of gyration Rg (electron density) rg_electron28.52
Forward intensity I(0) i0116710000.00
Molecular weight molecular_weight83855.0 kDa
Excluded volume excluded_volume104260 ų
Envelope volume envelope_volume125360 ų
Hydration-shell volume shell_volume36064 ų
Envelope diameter envelope_diameter93.3
Shell Rg shell_rg36.31
Envelope Rg envelope_rg28.44
Shape Rg shape_rg28.54
Total Rg total_rg29.16
Total atoms total_atoms5910
Residues n_residues754
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 dmax92.9
Rg (real space) rg_real29.17
Rg uncertainty (real space) rg_real_error0.62
I(0) (real space) i0_real1.1670e+08
I(0) uncertainty (real space) i0_real_error1.7650e+06
Rg (reciprocal space) rg_reciprocal29.20
I(0) (reciprocal space) i0_reciprocal116700000.0000
Solution quality estimate total_estimate0.9014
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary32.7
Skewness Skewness skewness0.283
Kurtosis Kurtosis kurtosis-0.490
Angular range angular_range— – 0.2700 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha26850000.0000
Real-space data points n_real_points55
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.924; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 1.000; Smooth: 0.941

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd6oboa_
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_idd6obob_
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_idd6oboc_
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_idd6obod_
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_id6oboA01
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_id6oboA02
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_id6oboB01
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_id6oboB02
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)