1r2b

Crystal structure of the BCL6 BTB domain complexed with a SMRT co-repressor peptide

Method: X-RAY DIFFRACTION Dmax: 69.7 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 heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 5–129 Chain B; UniProt 5–129 Fragment:BCL6 (residues 5-129) Mutation:C8Q, C67R, C84N Nuclear receptor co-repressor 2 × 2 (Q9Y618) X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;PEG 3350, sodium acetate, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.20 Å R-free 0.267

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 3–127; UniProt 5–129 Author chain B; PDBConstruct 3–127; UniProt 5–129

Nuclear receptor co-repressor 2

Homo sapiens

UniProt Q9Y618

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 heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain C; UniProt 1414–1430 Chain D; UniProt 1414–1430 Fragment:SMRT - BBD (residues 1414-1430) B-cell lymphoma 6 protein × 2 (P41182) X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;298 K;PEG 3350, sodium acetate, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.20 Å R-free 0.267

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.

31 other PDB entries and 71 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name NCOR2_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain C; PDBConstruct 3–19; UniProt 1414–1430 Author chain D; PDBConstruct 3–19; UniProt 1414–1430

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 1r2b

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1r2b
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1r2b
Deposition date deposition_date2003-09-26
Structure title titleCrystal structure of the BCL6 BTB domain complexed with a SMRT co-repressor peptide
Keywords keywordsBTB domain, HDAC complex, B-cell lymphoma, transcriptional repression, TRANSCRIPTION; TRANSCRIPTION
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier20.83
Radius of gyration Rg (electron density) rg_electron19.95
Forward intensity I(0) i018479100.00
Molecular weight molecular_weight32480.0 kDa
Excluded volume excluded_volume40766 ų
Envelope volume envelope_volume47850 ų
Hydration-shell volume shell_volume20179 ų
Envelope diameter envelope_diameter70.9
Shell Rg shell_rg26.42
Envelope Rg envelope_rg20.53
Shape Rg shape_rg19.92
Total Rg total_rg20.96
Total atoms total_atoms2275
Residues n_residues284
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 dmax69.7
Rg (real space) rg_real20.81
Rg uncertainty (real space) rg_real_error0.46
I(0) (real space) i0_real1.8480e+07
I(0) uncertainty (real space) i0_real_error2.5170e+05
Rg (reciprocal space) rg_reciprocal20.82
I(0) (reciprocal space) i0_reciprocal18480000.0000
Solution quality estimate total_estimate0.7957
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary24.3
Skewness Skewness skewness0.376
Kurtosis Kurtosis kurtosis-0.213
Angular range angular_range— – 0.3800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha5629000.0000
Real-space data points n_real_points70
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.782; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.993; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1r2ba_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.42 — POZ domain
Superfamily Superfamily superfamilyd.42.1 — POZ domain
Family Family familyd.42.1.1 — BTB/POZ domain
Domain ID domain_idd1r2bb_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.42 — POZ domain
Superfamily Superfamily superfamilyd.42.1 — POZ domain
Family Family familyd.42.1.1 — BTB/POZ domain

CATH v4.4 (2 domains)

Domain ID domain_id1r2bA00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily10 — Potassium Channel Kv1.1; Chain A
Domain ID domain_id1r2bB00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily10 — Potassium Channel Kv1.1; Chain A

8. Citations (1)

9. Files and Curves (10)