6j6k

Apo-state streptavidin

Method: ELECTRON MICROSCOPY Dmax: 66.4 Å Quality: GOOD

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

Streptavidin

OrganismNot specified

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 40–158 Chain B; UniProt 40–158 Chain C; UniProt 40–158 Chain D; UniProt 40–158 Not recorded No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.30 Å

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
Chains and sequence ranges Author chain A; PDBConstruct 1–119; UniProt 40–158 Author chain B; PDBConstruct 1–119; UniProt 40–158 Author chain C; PDBConstruct 1–119; UniProt 40–158 Author chain D; PDBConstruct 1–119; UniProt 40–158

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 6j6k

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6j6k
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id6j6k
Deposition date deposition_date2019-01-15
Structure title titleApo-state streptavidin
Keywords keywordsstreptavidin, CYTOSOLIC PROTEIN; CYTOSOLIC PROTEIN
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier22.89
Radius of gyration Rg (electron density) rg_electron21.76
Forward intensity I(0) i044604700.00
Molecular weight molecular_weight50035.0 kDa
Excluded volume excluded_volume61859 ų
Envelope volume envelope_volume75893 ų
Hydration-shell volume shell_volume27891 ų
Envelope diameter envelope_diameter67.4
Shell Rg shell_rg29.26
Envelope Rg envelope_rg22.00
Shape Rg shape_rg21.73
Total Rg total_rg22.75
Total atoms total_atoms3548
Residues n_residues476
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 dmax66.4
Rg (real space) rg_real22.73
Rg uncertainty (real space) rg_real_error0.34
I(0) (real space) i0_real4.4600e+07
I(0) uncertainty (real space) i0_real_error5.2270e+05
Rg (reciprocal space) rg_reciprocal22.77
I(0) (reciprocal space) i0_reciprocal44610000.0000
Solution quality estimate total_estimate0.8891
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary30.7
Skewness Skewness skewness0.077
Kurtosis Kurtosis kurtosis-0.556
Angular range angular_range— – 0.3450 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha13950000.0000
Real-space data points n_real_points66
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.968; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.979; Smooth: 0.673

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id6j6kA00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id6j6kB00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id6j6kC00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id6j6kD00
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)