6t2z

Streptavidin variants harbouring an artificial organocatalyst based cofactor

Method: X-RAY DIFFRACTION Dmax: 66.1 Å Quality: EXCELLENT

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 38–183 Chain B; UniProt 38–183 Not recorded HL9 5-[(3~{a}~{S},4~{S},6~{a}~{R})-2-oxidanylidene-1,3,3~{a},4,6,6~{a}-hexahydrothieno[3,4-d]imidazol-4-yl]-~{N}-(1-pyridin-4-ylpiperidin-4-yl)pentanamide × 4 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;293 K;1.6M Na2HPO4 0.4M K2HPO4 0.1M Sodium citrate phosphate pH 4.2 Resolution 1.35 Å R-free 0.183

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 14–159; UniProt 38–183 Author chain B; PDBConstruct 14–159; UniProt 38–183

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 6t2z

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6t2z
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6t2z
Deposition date deposition_date2019-10-10
Structure title titleStreptavidin variants harbouring an artificial organocatalyst based cofactor
Keywords keywordsartificial cofactor, streptavidin, catalyst, Biotin-binding protein; Biotin-binding protein
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier20.98
Radius of gyration Rg (electron density) rg_electron19.98
Forward intensity I(0) i012965200.00
Molecular weight molecular_weight26228.0 kDa
Excluded volume excluded_volume32441 ų
Envelope volume envelope_volume40779 ų
Hydration-shell volume shell_volume17287 ų
Envelope diameter envelope_diameter66.0
Shell Rg shell_rg25.72
Envelope Rg envelope_rg19.96
Shape Rg shape_rg19.94
Total Rg total_rg20.90
Total atoms total_atoms3605
Residues n_residues243
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 dmax66.1
Rg (real space) rg_real20.88
Rg uncertainty (real space) rg_real_error0.38
I(0) (real space) i0_real1.2970e+07
I(0) uncertainty (real space) i0_real_error1.7580e+05
Rg (reciprocal space) rg_reciprocal20.90
I(0) (reciprocal space) i0_reciprocal12970000.0000
Solution quality estimate total_estimate0.9103
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary27.8
Skewness Skewness skewness0.100
Kurtosis Kurtosis kurtosis-0.580
Angular range angular_range— – 0.3800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1360000.0000
Real-space data points n_real_points70
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.948; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 1.000; Smooth: 0.985

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd6t2za_
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_idd6t2zb_
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

8. Citations (1)

9. Files and Curves (10)