1lcz

streptavidin-BCAP complex

Method: X-RAY DIFFRACTION Dmax: 59.7 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 25–159 Chain B; UniProt 25–159 Not recorded BH7 E-AMINO BIOTINYL CAPROIC ACID × 4 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 4.2;293 K;1.2M ammonium sulfate, 0.1M sodium acetate, pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 1.95 Å R-free 0.237
2 Protein homooligomer Homooligomer Protein × 8 PDB declaration: octameric(8) Consistent with protein copy count Chain A; UniProt 25–159 Chain B; UniProt 25–159 Not recorded BH7 E-AMINO BIOTINYL CAPROIC ACID × 8 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 4.2;293 K;1.2M ammonium sulfate, 0.1M sodium acetate, pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 1.95 Å R-free 0.237

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 367 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 1–135; UniProt 25–159 Author chain B; PDBConstruct 1–135; UniProt 25–159

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 1lcz

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1lcz
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id1lcz
Deposition date deposition_date2002-04-08
Structure title titlestreptavidin-BCAP complex
Keywords keywordsavidin, streptavidin, biotin, ligand exchange, UNKNOWN FUNCTION; UNKNOWN FUNCTION
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier17.98
Radius of gyration Rg (electron density) rg_electron16.83
Forward intensity I(0) i012598800.00
Molecular weight molecular_weight25725.0 kDa
Excluded volume excluded_volume31778 ų
Envelope volume envelope_volume36051 ų
Hydration-shell volume shell_volume17558 ų
Envelope diameter envelope_diameter60.2
Shell Rg shell_rg23.38
Envelope Rg envelope_rg17.32
Shape Rg shape_rg16.80
Total Rg total_rg17.89
Total atoms total_atoms1821
Residues n_residues237
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 dmax59.7
Rg (real space) rg_real17.87
Rg uncertainty (real space) rg_real_error0.31
I(0) (real space) i0_real1.2600e+07
I(0) uncertainty (real space) i0_real_error1.6000e+05
Rg (reciprocal space) rg_reciprocal17.88
I(0) (reciprocal space) i0_reciprocal12600000.0000
Solution quality estimate total_estimate0.8798
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary21.8
Skewness Skewness skewness0.177
Kurtosis Kurtosis kurtosis-0.419
Angular range angular_range— – 0.4400 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha3234000.0000
Real-space data points n_real_points75
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.813; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.998; Smooth: 0.997

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1lcza_
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_idd1lczb_
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 (2 domains)

Domain ID domain_id1lczA00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily30 — Avidin-like
Domain ID domain_id1lczB00
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)