2bt0

Novel, potent small molecule inhibitors of the molecular chaperone Hsp90 discovered through structure-based design

Method: X-RAY DIFFRACTION Dmax: 88.1 Å Quality: REASONABLE

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

HEAT SHOCK PROTEIN HSP90-ALPHA

HOMO SAPIENS

UniProt P07900

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 1–235 Fragment:N-TERMINAL DOMAIN, RESIDUES 1-235 CT5 4-[4-(2,3-DIHYDRO-1,4-BENZODIOXIN-6-YL)-3-METHYL-1H-PYRAZOL-5-YL]-6-ETHYLBENZENE-1,3-DIOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;pH 6.50 Resolution 1.90 Å R-free 0.244
2 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 1–235 Fragment:N-TERMINAL DOMAIN, RESIDUES 1-235 CT5 4-[4-(2,3-DIHYDRO-1,4-BENZODIOXIN-6-YL)-3-METHYL-1H-PYRAZOL-5-YL]-6-ETHYLBENZENE-1,3-DIOL × 2 X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;pH 6.50 Resolution 1.90 Å R-free 0.244

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.

438 other PDB entries and 529 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name HS90A_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–235; UniProt 1–235 Author chain B; PDBConstruct 1–235; UniProt 1–235

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 2bt0

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2bt0
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2bt0
Deposition date deposition_date2005-05-24
Structure title titleNovel, potent small molecule inhibitors of the molecular chaperone Hsp90 discovered through structure-based design
Keywords keywordsATP-BINDING, CHAPERONE, HEAT SHOCK, PHOSPHORYLATION; CHAPERONE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier27.16
Radius of gyration Rg (electron density) rg_electron26.38
Forward intensity I(0) i035814000.00
Molecular weight molecular_weight47160.0 kDa
Excluded volume excluded_volume59427 ų
Envelope volume envelope_volume72721 ų
Hydration-shell volume shell_volume24255 ų
Envelope diameter envelope_diameter91.0
Shell Rg shell_rg31.88
Envelope Rg envelope_rg26.48
Shape Rg shape_rg26.38
Total Rg total_rg27.02
Total atoms total_atoms3324
Residues n_residues418
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 dmax88.1
Rg (real space) rg_real27.38
Rg uncertainty (real space) rg_real_error0.76
I(0) (real space) i0_real3.5810e+07
I(0) uncertainty (real space) i0_real_error5.7870e+05
Rg (reciprocal space) rg_reciprocal27.31
I(0) (reciprocal space) i0_reciprocal35810000.0000
Solution quality estimate total_estimate0.6470
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.8
Skewness Skewness skewness0.501
Kurtosis Kurtosis kurtosis-0.408
Angular range angular_range— – 0.2900 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha6512000.0000
Real-space data points n_real_points59
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.821; Stabil: 0.999; Sysdev: 0.127; Positv: 1.000; Valcen: 0.895; Smooth: 0.669

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_idd2bt0a_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.122 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Superfamily Superfamily superfamilyd.122.1 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Family Family familyd.122.1.1 — Heat shock protein 90, HSP90, N-terminal domain
Domain ID domain_idd2bt0b_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.122 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Superfamily Superfamily superfamilyd.122.1 — ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase
Family Family familyd.122.1.1 — Heat shock protein 90, HSP90, N-terminal domain

CATH v4.4 (2 domains)

Domain ID domain_id2bt0A00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology565 — Heat Shock Protein 90
Homologous superfamily homologous superfamily10 — Histidine kinase-like ATPase, C-terminal domain
Domain ID domain_id2bt0B00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology565 — Heat Shock Protein 90
Homologous superfamily homologous superfamily10 — Histidine kinase-like ATPase, C-terminal domain

8. Citations (1)

9. Files and Curves (10)