2onq

Gbeta1 stabilization by in vitro evolution and computational design

Method: X-RAY DIFFRACTION Dmax: 38.9 Å Quality: GOOD

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

Immunoglobulin G-binding protein G

Streptococcus sp.

UniProt P19909

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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 373–427 Fragment:residues 373-427 Mutation:T2Q, Y3F, L7I, T16I, T18I, T25E, V29F, V39I No other associated polymer X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 5;293.15 K;50mM sodium acetate, 20mg/ml protein solution mixed in equal volume of crystallization buffer containing 33% PEG monomethylether, 0.1M calcium chloride, pH 5.0, VAPOR DIFFUSION, SITTING DROP, temperature 293.15K Resolution 1.70 Å R-free 0.229

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.

76 other PDB entries and 116 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SPG2_STRSG
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 2–56; UniProt 373–427

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 2onq

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2onq
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2onq
Deposition date deposition_date2007-01-24
Structure title titleGbeta1 stabilization by in vitro evolution and computational design
Keywords keywordsbeta sheet, alpha helix, improved hydrophobic packing of core residues, PROTEIN BINDING; PROTEIN BINDING
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier12.23
Radius of gyration Rg (electron density) rg_electron10.62
Forward intensity I(0) i0926979.00
Molecular weight molecular_weight6316.0 kDa
Excluded volume excluded_volume7925 ų
Envelope volume envelope_volume8794 ų
Hydration-shell volume shell_volume7388 ų
Envelope diameter envelope_diameter35.4
Shell Rg shell_rg15.75
Envelope Rg envelope_rg10.99
Shape Rg shape_rg10.56
Total Rg total_rg12.28
Total atoms total_atoms446
Residues n_residues56
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 dmax38.9
Rg (real space) rg_real12.17
Rg uncertainty (real space) rg_real_error0.22
I(0) (real space) i0_real9.2700e+05
I(0) uncertainty (real space) i0_real_error9.1480e+03
Rg (reciprocal space) rg_reciprocal12.17
I(0) (reciprocal space) i0_reciprocal927000.0000
Solution quality estimate total_estimate0.8941
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary14.8
Skewness Skewness skewness0.157
Kurtosis Kurtosis kurtosis-0.340
Angular range angular_range— – 0.5000 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha140000.0000
Real-space data points n_real_points80
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.886; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.998; Smooth: 0.965

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (2)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd2onqa_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.15 — beta-Grasp (ubiquitin-like)
Superfamily Superfamily superfamilyd.15.7 — Immunoglobulin-binding domains
Family Family familyd.15.7.1 — Immunoglobulin-binding domains

CATH v4.4 (1 domains)

Domain ID domain_id2onqA00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily10

8. Citations (1)

9. Files and Curves (10)