7lzq

Crystal structure of the BCL6 BTB domain in complex with OICR-4425

Method: X-RAY DIFFRACTION Dmax: 64.8 Å Quality: GOOD

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

B-cell lymphoma 6 protein

Homo sapiens

UniProt P41182

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–129 Fragment:BTB domain, residues 1-129 Mutation:C8Q, C67R, C84N YJV N-(3-chloropyridin-4-yl)-2-(5-methyl-4-oxo-4,5-dihydro-1H-pyrrolo[3,2-c]pyridin-1-yl)acetamide × 2 DMS DIMETHYL SULFOXIDE × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;293 K;Protein (Bcl6 BTB domain(1-129) 13 mg/ml in protein buffer( 20 mM Tris pH 8.3, 300 mM NaCl, 10% glycerol, 1 mM TECEP)) was mixed 1:1 with reservoir buffer (1.3M sodium formate, 0.1M Na acetate pH 5.2. Ostwald ripening of the early appearing crystals took place over about 5 days. To affect a partial dehydration the reservoir buffer was exchanged in 0.5 M steps to 4 M Na formate/0.1M Na acetate pH 5.2. In separate wells drops of soaking buffer ((1 M Na formate, 5% glycerol, 50 mM Na acetate pH5.2, 10 mM Tris pH 8.3, 150 mM NaCl) was also equilibrated against the 4 M formate/acetate. Crystals were transferred to equilibrated soaking buffer to which 2.5 mM OICR-4425 and 5% DMSO had been added. Resolution 1.71 Å R-free 0.194

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.

245 other PDB entries and 265 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BCL6_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–129; UniProt 1–129

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 7lzq

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7lzq
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7lzq
Deposition date deposition_date2021-03-10
Structure title titleCrystal structure of the BCL6 BTB domain in complex with OICR-4425
Keywords keywordsimmunity, inflammatory response, transcription repressor, TRANSCRIPTION-INHIBITOR complex; TRANSCRIPTION/INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier17.60
Radius of gyration Rg (electron density) rg_electron16.53
Forward intensity I(0) i04526510.00
Molecular weight molecular_weight15035.0 kDa
Excluded volume excluded_volume18831 ų
Envelope volume envelope_volume24025 ų
Hydration-shell volume shell_volume12887 ų
Envelope diameter envelope_diameter64.8
Shell Rg shell_rg21.71
Envelope Rg envelope_rg17.48
Shape Rg shape_rg16.45
Total Rg total_rg17.77
Total atoms total_atoms1050
Residues n_residues128
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 dmax64.8
Rg (real space) rg_real17.62
Rg uncertainty (real space) rg_real_error0.54
I(0) (real space) i0_real4.5270e+06
I(0) uncertainty (real space) i0_real_error5.7710e+04
Rg (reciprocal space) rg_reciprocal17.62
I(0) (reciprocal space) i0_reciprocal4527000.0000
Solution quality estimate total_estimate0.8377
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary20.8
Skewness Skewness skewness0.377
Kurtosis Kurtosis kurtosis-0.059
Angular range angular_range— – 0.4500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha522300.0000
Real-space data points n_real_points76
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.679; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.857; Smooth: 0.991

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

8. Citations (1)

9. Files and Curves (10)