7b4e

Structural basis of reactivation of oncogenic p53 mutants by a small molecule: methylene quinuclidinone (MQ). Human p53DBD-R282W mutant bound to DNA and MQ: R282W-DNA-MQ

Method: X-RAY DIFFRACTION Dmax: 63.1 Å Quality: GOOD

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

Cellular tumor antigen p53

Homo sapiens

UniProt P04637

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–DNA Homooligomer Protein × 2 DNA 2 PDB declaration: tetramer(4) Consistent with all polymer counts Chain A; UniProt 94–293 Fragment:p53 human DNA binding domain Mutation:R282W DNA target × 2 ZN ZINC ION × 2 QN8 (2~{R})-2-methyl-1-azabicyclo[2.2.2]octan-3-one × 6 QNN (2~{S})-2-methyl-1-azabicyclo[2.2.2]octan-3-one × 2 PG4 TETRAETHYLENE GLYCOL × 2 EDO 1,2-ETHANEDIOL × 4 X-RAY DIFFRACTION X-ray crystallization conditions:EVAPORATION;pH 6.1;292 K;Protein/DNA ratio 1:1.5, 0.1M Sodium Acetate, 20% w/v PEG 3350 Resolution 1.58 Å R-free 0.201

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.

291 other PDB entries and 462 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name P53_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–200; UniProt 94–293

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 7b4e

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7b4e
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7b4e
Deposition date deposition_date2020-12-02
Structure title titleStructural basis of reactivation of oncogenic p53 mutants by a small molecule: methylene quinuclidinone (MQ). Human p53DBD-R282W mutant bound to DNA and MQ: R282W-DNA-MQ
Keywords keywords;P53, TUMOR SUPPRESSOR, DNA BINDING PROTEIN, PROTEIN DNA COMPLEX, MICHAEL ACCEPTOR, MICHAEL REACTION, PROTEIN-DRUG COMPLEX, PROTEIN-DNA-DRUG COMPLEX, LOOP-SHEET-HELIX MOTIF, DNA TARGET, ACTIVATOR, TRANSCRIPTION, HOOGSTEEN BASE-PAIRING ;; TRANSCRIPTION
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier19.84
Radius of gyration Rg (electron density) rg_electron18.34
Forward intensity I(0) i014609100.00
Molecular weight molecular_weight25249.0 kDa
Excluded volume excluded_volume30217 ų
Envelope volume envelope_volume38255 ų
Hydration-shell volume shell_volume17750 ų
Envelope diameter envelope_diameter63.7
Shell Rg shell_rg24.35
Envelope Rg envelope_rg18.72
Shape Rg shape_rg18.31
Total Rg total_rg19.30
Total atoms total_atoms1748
Residues n_residues201
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 dmax63.1
Rg (real space) rg_real19.79
Rg uncertainty (real space) rg_real_error0.34
I(0) (real space) i0_real1.4610e+07
I(0) uncertainty (real space) i0_real_error1.6450e+05
Rg (reciprocal space) rg_reciprocal19.79
I(0) (reciprocal space) i0_reciprocal14610000.0000
Solution quality estimate total_estimate0.8957
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary24.0
Skewness Skewness skewness0.302
Kurtosis Kurtosis kurtosis-0.283
Angular range angular_range— – 0.4000 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1497000.0000
Real-space data points n_real_points72
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.880; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 1.000; Smooth: 0.999

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (8)

8. Citations (1)

9. Files and Curves (10)