4bx5

cis-divalent streptavidin

Method: X-RAY DIFFRACTION Dmax: 68.2 Å Quality: GOOD

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

STREPTAVIDIN

STREPTOMYCES AVIDINII

UniProt P22629

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 × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 37–163 Chain B; UniProt 37–163 Chain C; UniProt 37–163 Chain D; UniProt 37–163 Fragment:RESIDUES 37-163 Mutation:YES Fragment:RESIDUES 37-163 EDO 1,2-ETHANEDIOL × 4 PG4 TETRAETHYLENE GLYCOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;2.5 % W/V POLYETHYLENE GLYCOL (PEG) 1000, 12.5 % W/V PEG 3350, 12.5 % V/V MPD, 30 MM OF ETHYLENE GLYCOL MIX (DI-ETHYLENEGLYCOL, TRI-ETHYLENEGLYCOL, TETRA-ETHYLENEGLYCOL, PENTA-ETHYLENEGLYCOL) AND 0.1 M MES/IMIDAZOLE PH 6.5, CORRESPONDING TO CONDITION E4 OF THE MORPHEUS SCREEN Resolution 1.43 Å R-free 0.187

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.

312 other PDB entries and 368 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SAV_STRAV
Isoform
PDB entities 1, 2
Chains and sequence ranges Author chain A; PDBConstruct 1–138; UniProt 37–163 Author chain C; PDBConstruct 1–138; UniProt 37–163 Author chain B; PDBConstruct 1–127; UniProt 37–163 Author chain D; PDBConstruct 1–127; UniProt 37–163

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 4bx5

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4bx5
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2. Structure Basics 2. Structure Basics

Entry ID entry_id4bx5
Deposition date deposition_date2013-07-08
Structure title titlecis-divalent streptavidin
Keywords keywordsBIOTIN-BINDING PROTEIN, BIOTIN, AVIDIN; BIOTIN-BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier22.72
Radius of gyration Rg (electron density) rg_electron21.62
Forward intensity I(0) i046342600.00
Molecular weight molecular_weight51202.0 kDa
Excluded volume excluded_volume63298 ų
Envelope volume envelope_volume74989 ų
Hydration-shell volume shell_volume27707 ų
Envelope diameter envelope_diameter71.1
Shell Rg shell_rg29.23
Envelope Rg envelope_rg21.87
Shape Rg shape_rg21.59
Total Rg total_rg22.58
Total atoms total_atoms3627
Residues n_residues480
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 dmax68.2
Rg (real space) rg_real22.56
Rg uncertainty (real space) rg_real_error0.38
I(0) (real space) i0_real4.6340e+07
I(0) uncertainty (real space) i0_real_error5.9270e+05
Rg (reciprocal space) rg_reciprocal22.60
I(0) (reciprocal space) i0_reciprocal46340000.0000
Solution quality estimate total_estimate0.8308
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary28.9
Skewness Skewness skewness0.085
Kurtosis Kurtosis kurtosis-0.542
Angular range angular_range— – 0.3500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha12920000.0000
Real-space data points n_real_points67
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.940; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.980; Smooth: 0.000

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_idd4bx5a_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd4bx5b_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd4bx5c_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin
Domain ID domain_idd4bx5d_
Class classb — All beta proteins
Fold Fold foldb.61 — Streptavidin-like
Superfamily Superfamily superfamilyb.61.1 — Avidin/streptavidin
Family Family familyb.61.1.1 — Avidin/streptavidin

CATH v4.4 (4 domains)

Domain ID domain_id4bx5A00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id4bx5B00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id4bx5C00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id4bx5D00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like

8. Citations (1)

9. Files and Curves (10)