4z9k

Ricin A chain bound to camelid nanobody (VHH2)(F5)

Method: X-RAY DIFFRACTION Dmax: 78.5 Å Quality: GOOD

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

Ricin

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 39–296 Fragment:UNP residues 39-296 VHH2(F5) antibody × 1 EDO 1,2-ETHANEDIOL × 2 ZN ZINC ION × 1 CL CHLORIDE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 8.5;295 K;100 mM Tris, 15% PEG 3000, 2 mM Zinc acetate, 10 mM sulfobetaine Resolution 1.50 Å R-free 0.195

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 126 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 1–258; UniProt 39–296

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 4z9k

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4z9k
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2. Structure Basics 2. Structure Basics

Entry ID entry_id4z9k
Deposition date deposition_date2015-04-10
Structure title titleRicin A chain bound to camelid nanobody (VHH2)(F5)
Keywords keywordsRicin toxin, nanobodies, Hydrolase-Immune system complex; Hydrolase/Immune system
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier23.63
Radius of gyration Rg (electron density) rg_electron22.77
Forward intensity I(0) i029720000.00
Molecular weight molecular_weight41544.0 kDa
Excluded volume excluded_volume51814 ų
Envelope volume envelope_volume60332 ų
Hydration-shell volume shell_volume22928 ų
Envelope diameter envelope_diameter83.2
Shell Rg shell_rg28.96
Envelope Rg envelope_rg22.99
Shape Rg shape_rg22.75
Total Rg total_rg23.57
Total atoms total_atoms2924
Residues n_residues374
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 dmax78.5
Rg (real space) rg_real23.68
Rg uncertainty (real space) rg_real_error0.57
I(0) (real space) i0_real2.9720e+07
I(0) uncertainty (real space) i0_real_error3.7390e+05
Rg (reciprocal space) rg_reciprocal23.67
I(0) (reciprocal space) i0_reciprocal29720000.0000
Solution quality estimate total_estimate0.8019
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary27.0
Skewness Skewness skewness0.418
Kurtosis Kurtosis kurtosis-0.296
Angular range angular_range— – 0.3350 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha8018000.0000
Real-space data points n_real_points65
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.824; Stabil: 0.998; Sysdev: 1.000; Positv: 1.000; Valcen: 0.953; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

7. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd4z9ka_
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_idd4z9kb_
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 (3 domains)

Domain ID domain_id4z9kA01
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_id4z9kA02
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_id4z9kB00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (2)

9. Files and Curves (10)