2c1e

Crystal structures of caspase-3 in complex with aza-peptide Michael acceptor inhibitors.

Method: X-RAY DIFFRACTION Dmax: 69.8 Å Quality: GOOD

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

CASPASE-3 SUBUNIT P17

HOMO SAPIENS

UniProt P42574

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 × 6 PDB declaration: hexameric(6) Consistent with protein copy count Chain A; UniProt 29–175 Chain B; UniProt 176–277 Fragment:ALPHA SUBUNIT, RESIDUES 29-175 Fragment:BETA SUBUNIT, RESIDUES 176-277 ;AZA-PEPTIDE INHIBITOR (5S, 8R, 11S)-8-(2-CARBOXYETHYL)-5-(CARBOXYMETHYL)-14-(4-ETHOXY-4-OXOBUTANOYL)-11-(1-METHYLETHYL)-3,6,9,12-TETRAOXO-1-PHENYL-2-OXA-4,7,10,13,14-PENTAAZAHEXADECAN -16-OIC ACID ; × 2 X-RAY DIFFRACTION X-ray crystallization conditions:pH 4.75;PEG6000, 100 MM SODIUM CITRATE PH 4.75 Resolution 1.77 Å R-free 0.188

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.

134 other PDB entries and 196 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CASP3_HUMAN
Isoform
PDB entities 1, 2
Chains and sequence ranges Author chain A; PDBConstruct 1–147; UniProt 29–175 Author chain B; PDBConstruct 2–103; UniProt 176–277

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 2c1e

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2c1e
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2c1e
Deposition date deposition_date2005-09-14
Structure title titleCrystal structures of caspase-3 in complex with aza-peptide Michael acceptor inhibitors.
Keywords keywords;APOPTOSIS, HYDROLASE-HYDROLASE INHIBITOR COMPLEX, CYSTEINE-PROTEASE, THIOL PROTEASE, ZYMOGEN, CPP32, YAMA, AZA-PEPTIDE, MICHAEL ACCEPTOR, AZA-ASP, CLAN CD ;; HYDROLASE/HYDROLASE INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier20.26
Radius of gyration Rg (electron density) rg_electron18.95
Forward intensity I(0) i015553500.00
Molecular weight molecular_weight29159.0 kDa
Excluded volume excluded_volume36286 ų
Envelope volume envelope_volume43683 ų
Hydration-shell volume shell_volume19245 ų
Envelope diameter envelope_diameter73.6
Shell Rg shell_rg25.73
Envelope Rg envelope_rg20.14
Shape Rg shape_rg18.93
Total Rg total_rg19.98
Total atoms total_atoms2045
Residues n_residues253
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 dmax69.8
Rg (real space) rg_real20.26
Rg uncertainty (real space) rg_real_error0.56
I(0) (real space) i0_real1.5550e+07
I(0) uncertainty (real space) i0_real_error2.0360e+05
Rg (reciprocal space) rg_reciprocal20.26
I(0) (reciprocal space) i0_reciprocal15550000.0000
Solution quality estimate total_estimate0.7821
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks3
Primary peak position r_peak_primary24.9
Skewness Skewness skewness0.415
Kurtosis Kurtosis kurtosis-0.070
Angular range angular_range— – 0.3900 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha2444000.0000
Real-space data points n_real_points71
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.728; Stabil: 0.996; Sysdev: 1.000; Positv: 1.000; Valcen: 0.989; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id2c1eA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily1460
Domain ID domain_id2c1eB00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily1470 — Caspase-like

8. Citations (1)

9. Files and Curves (10)