4pcr

Crystal structure of Canavalia brasiliensis seed lectin (ConBr) complexed with Gamma-Aminobutyric Acid (GABA)

Method: X-RAY DIFFRACTION Dmax: 83.7 Å Quality: GOOD

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

Concanavalin-Br

OrganismNot specified

UniProt P55915

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–237 Chain D; UniProt 1–237 Not recorded CA CALCIUM ION × 2 MN MANGANESE (II) ION × 2 IPA ISOPROPYL ALCOHOL × 2 ABU GAMMA-AMINO-BUTANOIC ACID × 3 PEG DI(HYDROXYETHYL)ETHER × 3 EDO 1,2-ETHANEDIOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;TRIS 0.1 M pH 9.0, amonium sulfate 2.2 M Resolution 2.15 Å R-free 0.236
2 Protein homooligomer Homooligomer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 1–237 Chain D; UniProt 1–237 Not recorded CA CALCIUM ION × 4 MN MANGANESE (II) ION × 4 IPA ISOPROPYL ALCOHOL × 4 ABU GAMMA-AMINO-BUTANOIC ACID × 6 PEG DI(HYDROXYETHYL)ETHER × 6 EDO 1,2-ETHANEDIOL × 4 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;TRIS 0.1 M pH 9.0, amonium sulfate 2.2 M Resolution 2.15 Å R-free 0.236

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.

19 other PDB entries and 23 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CONA_CANBR
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–237; UniProt 1–237 Author chain D; PDBConstruct 1–237; UniProt 1–237

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 4pcr

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id4pcr
Deposition date deposition_date2014-04-16
Structure title titleCrystal structure of Canavalia brasiliensis seed lectin (ConBr) complexed with Gamma-Aminobutyric Acid (GABA)
Keywords keywordsSUGAR BINDING PROTEIN; SUGAR BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier25.94
Radius of gyration Rg (electron density) rg_electron24.82
Forward intensity I(0) i043536800.00
Molecular weight molecular_weight51255.0 kDa
Excluded volume excluded_volume64167 ų
Envelope volume envelope_volume74831 ų
Hydration-shell volume shell_volume25831 ų
Envelope diameter envelope_diameter86.6
Shell Rg shell_rg31.60
Envelope Rg envelope_rg25.01
Shape Rg shape_rg24.77
Total Rg total_rg25.73
Total atoms total_atoms3610
Residues n_residues466
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 dmax83.7
Rg (real space) rg_real26.03
Rg uncertainty (real space) rg_real_error0.58
I(0) (real space) i0_real4.3540e+07
I(0) uncertainty (real space) i0_real_error6.1960e+05
Rg (reciprocal space) rg_reciprocal26.01
I(0) (reciprocal space) i0_reciprocal43540000.0000
Solution quality estimate total_estimate0.8845
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary26.1
Skewness Skewness skewness0.426
Kurtosis Kurtosis kurtosis-0.447
Angular range angular_range— – 0.3050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha7618000.0000
Real-space data points n_real_points62
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.873; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.949; Smooth: 0.926

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (8)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd4pcra_
Class classb — All beta proteins
Fold Fold foldb.29 — Concanavalin A-like lectins/glucanases
Superfamily Superfamily superfamilyb.29.1 — Concanavalin A-like lectins/glucanases
Family Family familyb.29.1.1 — Legume lectins
Domain ID domain_idd4pcrd_
Class classb — All beta proteins
Fold Fold foldb.29 — Concanavalin A-like lectins/glucanases
Superfamily Superfamily superfamilyb.29.1 — Concanavalin A-like lectins/glucanases
Family Family familyb.29.1.1 — Legume lectins

CATH v4.4 (2 domains)

Domain ID domain_id4pcrA00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily200
Domain ID domain_id4pcrD00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily200

8. Citations (1)

9. Files and Curves (10)