1nw9

STRUCTURE OF CASPASE-9 IN AN INHIBITORY COMPLEX WITH XIAP-BIR3

Method: X-RAY DIFFRACTION Dmax: 69.1 Å Quality: GOOD

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

Baculoviral IAP repeat-containing protein 4

Homo sapiens

UniProt P98170

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 253–350 Not recorded caspase 9, apoptosis-related cysteine protease × 1 (P55211) ZN ZINC ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;293 K;Tris, potassium phosphate, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 2.40 Å R-free 0.235

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.

73 other PDB entries and 144 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BIRC4_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–98; UniProt 253–350

caspase 9, apoptosis-related cysteine protease

Homo sapiens

UniProt P55211

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 140–416 Not recorded Baculoviral IAP repeat-containing protein 4 × 1 (P98170) ZN ZINC ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;293 K;Tris, potassium phosphate, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 293K Resolution 2.40 Å R-free 0.235

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.

7 other PDB entries and 16 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CASP9_HUMAN
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–277; UniProt 140–416

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 1nw9

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1nw9
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1nw9
Deposition date deposition_date2003-02-05
Structure title titleSTRUCTURE OF CASPASE-9 IN AN INHIBITORY COMPLEX WITH XIAP-BIR3
Keywords keywordscaspase-9, XIAP, caspase inhibition, caspase activation, dimerization, apoptosis; APOPTOSIS
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier21.66
Radius of gyration Rg (electron density) rg_electron20.55
Forward intensity I(0) i023262800.00
Molecular weight molecular_weight36860.0 kDa
Excluded volume excluded_volume46148 ų
Envelope volume envelope_volume53010 ų
Hydration-shell volume shell_volume21757 ų
Envelope diameter envelope_diameter71.2
Shell Rg shell_rg27.08
Envelope Rg envelope_rg20.81
Shape Rg shape_rg20.54
Total Rg total_rg21.44
Total atoms total_atoms2590
Residues n_residues329
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 dmax69.1
Rg (real space) rg_real21.58
Rg uncertainty (real space) rg_real_error0.34
I(0) (real space) i0_real2.3260e+07
I(0) uncertainty (real space) i0_real_error2.8840e+05
Rg (reciprocal space) rg_reciprocal21.60
I(0) (reciprocal space) i0_reciprocal23260000.0000
Solution quality estimate total_estimate0.7530
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.8
Skewness Skewness skewness0.246
Kurtosis Kurtosis kurtosis-0.439
Angular range angular_range— – 0.3650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha4540000.0000
Real-space data points n_real_points68
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.916; Stabil: 1.000; Sysdev: 0.348; Positv: 1.000; Valcen: 0.997; Smooth: 0.996

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_idd1nw9a_
Class classg — Small proteins
Fold Fold foldg.52 — Inhibitor of apoptosis (IAP) repeat
Superfamily Superfamily superfamilyg.52.1 — Inhibitor of apoptosis (IAP) repeat
Family Family familyg.52.1.1 — Inhibitor of apoptosis (IAP) repeat
Domain ID domain_idd1nw9b_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.17 — Caspase-like
Superfamily Superfamily superfamilyc.17.1 — Caspase-like
Family Family familyc.17.1.1 — Caspase catalytic domain

CATH v4.4 (2 domains)

Domain ID domain_id1nw9A00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1170 — Inhibitor Of Apoptosis Protein (2mihbC-IAP-1); Chain A
Homologous superfamily homologous superfamily10 — Inhibitor Of Apoptosis Protein (2mihbC-IAP-1); Chain A
Domain ID domain_id1nw9B00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily1460

8. Citations (1)

9. Files and Curves (10)