4ic2

Crystal structure of the XIAP RING domain

Method: X-RAY DIFFRACTION Dmax: 51.5 Å Quality: EXCELLENT

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

E3 ubiquitin-protein ligase XIAP

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 429–497 Chain B; UniProt 429–497 Fragment:RING DOMAIN, UNP residues 429-497 ZN ZINC ION × 4 NI NICKEL (II) ION × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;291 K;100mM Tris-HCl, 20% MME PEG2000, 10mM NiCl2, 1mM TCEP, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 291K Resolution 2.20 Å R-free 0.237

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 XIAP_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 6–74; UniProt 429–497 Author chain B; PDBConstruct 6–74; UniProt 429–497

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 4ic2

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4ic2
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2. Structure Basics 2. Structure Basics

Entry ID entry_id4ic2
Deposition date deposition_date2012-12-09
Structure title titleCrystal structure of the XIAP RING domain
Keywords keywordsRING DOMAIN, ZINC-FINGER, E3 ligase, Ligase; LIGASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier16.35
Radius of gyration Rg (electron density) rg_electron15.34
Forward intensity I(0) i04621150.00
Molecular weight molecular_weight14920.0 kDa
Excluded volume excluded_volume18501 ų
Envelope volume envelope_volume21468 ų
Hydration-shell volume shell_volume12244 ų
Envelope diameter envelope_diameter51.7
Shell Rg shell_rg20.47
Envelope Rg envelope_rg15.60
Shape Rg shape_rg15.36
Total Rg total_rg16.27
Total atoms total_atoms1011
Residues n_residues126
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 dmax51.5
Rg (real space) rg_real16.26
Rg uncertainty (real space) rg_real_error0.29
I(0) (real space) i0_real4.6210e+06
I(0) uncertainty (real space) i0_real_error5.2870e+04
Rg (reciprocal space) rg_reciprocal16.27
I(0) (reciprocal space) i0_reciprocal4621000.0000
Solution quality estimate total_estimate0.9101
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary50.8
Skewness Skewness skewness0.097
Kurtosis Kurtosis kurtosis-0.528
Angular range angular_range— – 0.4850 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha372700.0000
Real-space data points n_real_points79
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.946; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 1.000; Smooth: 0.989

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_id4ic2A00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology40 — Herpes Virus-1
Homologous superfamily homologous superfamily10 — Zinc/RING finger domain, C3HC4 (zinc finger)
Domain ID domain_id4ic2B00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology40 — Herpes Virus-1
Homologous superfamily homologous superfamily10 — Zinc/RING finger domain, C3HC4 (zinc finger)

8. Citations (1)

9. Files and Curves (10)