6nl7

Crystal structure of B1 immunoglobulin-binding domain of Streptococcal Protein G (T16F, T18A, V21H, T25H, K28Y, V29I, K31R, Q32A, Y33L, N35K, D36A, N37Q)

Method: X-RAY DIFFRACTION Dmax: 81.1 Å Quality: GOOD

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

Immunoglobulin G-binding protein G

Streptococcus

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 303–357 Mutation:T16F, T18A, V21H, T25H, K28Y, V29I, K31R, Q32A, Y33L, N35K, D36A, N37Q ZN ZINC ION × 2 ACT ACETATE ION × 2 NA SODIUM ION × 2 CL CHLORIDE ION × 1 PO4 PHOSPHATE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;80 mM acetic acid pH 3.6, 20 mM acetic acid pH 5.8, 30% 2,4-methylpentanediol, 200 mM NaCl and 20 mM zinc sulfate Resolution 1.40 Å R-free 0.158
2 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain B; UniProt 303–357 Mutation:T16F, T18A, V21H, T25H, K28Y, V29I, K31R, Q32A, Y33L, N35K, D36A, N37Q ZN ZINC ION × 2 ACT ACETATE ION × 3 NA SODIUM ION × 1 PO4 PHOSPHATE ION × 1 DPO DIPHOSPHATE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;80 mM acetic acid pH 3.6, 20 mM acetic acid pH 5.8, 30% 2,4-methylpentanediol, 200 mM NaCl and 20 mM zinc sulfate Resolution 1.40 Å R-free 0.158
3 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain C; UniProt 303–357 Mutation:T16F, T18A, V21H, T25H, K28Y, V29I, K31R, Q32A, Y33L, N35K, D36A, N37Q ACT ACETATE ION × 2 NA SODIUM ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;80 mM acetic acid pH 3.6, 20 mM acetic acid pH 5.8, 30% 2,4-methylpentanediol, 200 mM NaCl and 20 mM zinc sulfate Resolution 1.40 Å R-free 0.158
4 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain D; UniProt 303–357 Mutation:T16F, T18A, V21H, T25H, K28Y, V29I, K31R, Q32A, Y33L, N35K, D36A, N37Q ACT ACETATE ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;80 mM acetic acid pH 3.6, 20 mM acetic acid pH 5.8, 30% 2,4-methylpentanediol, 200 mM NaCl and 20 mM zinc sulfate Resolution 1.40 Å R-free 0.158

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 113 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 303–357 Author chain B; PDBConstruct 2–56; UniProt 303–357 Author chain C; PDBConstruct 2–56; UniProt 303–357 Author chain D; PDBConstruct 2–56; UniProt 303–357

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 6nl7

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6nl7
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6nl7
Deposition date deposition_date2019-01-08
Structure title titleCrystal structure of B1 immunoglobulin-binding domain of Streptococcal Protein G (T16F, T18A, V21H, T25H, K28Y, V29I, K31R, Q32A, Y33L, N35K, D36A, N37Q)
Keywords keywordsMetal-mediated complex, B1 Domain of Streptococcal protein G, Immunoglobulin binding protein, METAL BINDING PROTEIN; METAL BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier23.65
Radius of gyration Rg (electron density) rg_electron23.63
Forward intensity I(0) i012931100.00
Molecular weight molecular_weight26173.0 kDa
Excluded volume excluded_volume32302 ų
Envelope volume envelope_volume40893 ų
Hydration-shell volume shell_volume16372 ų
Envelope diameter envelope_diameter80.3
Shell Rg shell_rg27.98
Envelope Rg envelope_rg23.92
Shape Rg shape_rg23.60
Total Rg total_rg24.35
Total atoms total_atoms1824
Residues n_residues224
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 dmax81.1
Rg (real space) rg_real23.98
Rg uncertainty (real space) rg_real_error0.74
I(0) (real space) i0_real1.2930e+07
I(0) uncertainty (real space) i0_real_error2.0600e+05
Rg (reciprocal space) rg_reciprocal23.90
I(0) (reciprocal space) i0_reciprocal12930000.0000
Solution quality estimate total_estimate0.8029
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary20.3
Skewness Skewness skewness0.581
Kurtosis Kurtosis kurtosis-0.356
Angular range angular_range— – 0.3350 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1980000.0000
Real-space data points n_real_points65
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.672; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.498; Smooth: 0.920

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (8)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id6nl7A00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily10
Domain ID domain_id6nl7B00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily10
Domain ID domain_id6nl7C00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily10
Domain ID domain_id6nl7D00
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)