1gb4

HYPERTHERMOPHILIC VARIANT OF THE B1 DOMAIN FROM STREPTOCOCCAL PROTEIN G, NMR, 47 STRUCTURES

Method: SOLUTION NMR Dmax: 32.5 Å Quality: GOOD

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

GB1-C3B4

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 372–427 Fragment:B1 DOMAIN Mutation:V1M, Y4F, V7I, T17I, T19I, T26E, V30I, V40I No other associated polymer SOLUTION NMR NMR measurement conditions:pH 5;308 K;Ionic strength (raw mmCIF value) 50mM;Pressure ATMOSPHERIC NMR sample composition:H2O/D2O Resolution not provided

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 2–57; UniProt 372–427

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 1gb4

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1gb4
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id1gb4
Deposition date deposition_date1998-01-19
Structure title titleHYPERTHERMOPHILIC VARIANT OF THE B1 DOMAIN FROM STREPTOCOCCAL PROTEIN G, NMR, 47 STRUCTURES
Keywords keywordsHYPERTHERMOPHILE, STREPTOCOCCAL PROTEIN G; HYPERTHERMOPHILE
Experimental Method methodSOLUTION NMR

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

Radius of gyration Rg (Guinier) rg_guinier10.64
Radius of gyration Rg (electron density) rg_electron10.46
Forward intensity I(0) i01181020000.00
Molecular weight molecular_weight298730.0 kDa
Excluded volume excluded_volume375270 ų
Envelope volume envelope_volume12660 ų
Hydration-shell volume shell_volume9189 ų
Envelope diameter envelope_diameter43.0
Shell Rg shell_rg17.52
Envelope Rg envelope_rg12.55
Shape Rg shape_rg10.37
Total Rg total_rg10.85
Total atoms total_atoms41595
Residues n_residues2679
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 dmax32.5
Rg (real space) rg_real10.60
Rg uncertainty (real space) rg_real_error0.26
I(0) (real space) i0_real1.1810e+09
I(0) uncertainty (real space) i0_real_error1.1930e+07
Rg (reciprocal space) rg_reciprocal10.60
I(0) (reciprocal space) i0_reciprocal1181000000.0000
Solution quality estimate total_estimate0.8040
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary13.6
Skewness Skewness skewness0.162
Kurtosis Kurtosis kurtosis-0.355
Angular range angular_range— – 0.5000 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha42140.0000
Real-space data points n_real_points80
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.826; Stabil: 0.990; Sysdev: 1.000; Positv: 1.000; Valcen: 0.999; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1gb4a_
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_id1gb4A00
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)