4q7h

Crystal structure of SAMHD1 catalytic core with GTP

Method: X-RAY DIFFRACTION Dmax: 120.1 Å Quality: GOOD

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

Deoxynucleoside triphosphate triphosphohydrolase SAMHD1

Homo sapiens

UniProt Q9Y3Z3

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 109–626 Chain B; UniProt 109–626 Fragment:HD-domain, UNP residues 109-626 Mutation:C266Y ZN ZINC ION × 2 GTP GUANOSINE-5'-TRIPHOSPHATE × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;298 K;0.2M Lithium citrate tribasic tetrahydrate, 24% PEG3350, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.59 Å R-free 0.248
2 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 109–626 Chain D; UniProt 109–626 Fragment:HD-domain, UNP residues 109-626 Mutation:C266Y ZN ZINC ION × 2 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 8;298 K;0.2M Lithium citrate tribasic tetrahydrate, 24% PEG3350, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K Resolution 2.59 Å R-free 0.248

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.

75 other PDB entries and 104 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SAMH1_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 9–526; UniProt 109–626 Author chain B; PDBConstruct 9–526; UniProt 109–626 Author chain C; PDBConstruct 9–526; UniProt 109–626 Author chain D; PDBConstruct 9–526; UniProt 109–626

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 4q7h

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4q7h
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2. Structure Basics 2. Structure Basics

Entry ID entry_id4q7h
Deposition date deposition_date2014-04-25
Structure title titleCrystal structure of SAMHD1 catalytic core with GTP
Keywords keywordsPROTEIN-GTP COMPLEX, HYDROLASE, HD-domain, dNTP Binding, Phosphorylation, GTP; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier38.13
Radius of gyration Rg (electron density) rg_electron37.68
Forward intensity I(0) i0623536000.00
Molecular weight molecular_weight203910.0 kDa
Excluded volume excluded_volume254710 ų
Envelope volume envelope_volume329460 ų
Hydration-shell volume shell_volume69245 ų
Envelope diameter envelope_diameter122.8
Shell Rg shell_rg46.51
Envelope Rg envelope_rg37.22
Shape Rg shape_rg37.67
Total Rg total_rg38.24
Total atoms total_atoms14368
Residues n_residues1794
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 dmax120.1
Rg (real space) rg_real37.90
Rg uncertainty (real space) rg_real_error0.68
I(0) (real space) i0_real6.2350e+08
I(0) uncertainty (real space) i0_real_error8.8460e+06
Rg (reciprocal space) rg_reciprocal38.04
I(0) (reciprocal space) i0_reciprocal623600000.0000
Solution quality estimate total_estimate0.8989
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary46.9
Skewness Skewness skewness0.158
Kurtosis Kurtosis kurtosis-0.513
Angular range angular_range— – 0.2050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha128200000.0000
Real-space data points n_real_points42
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.912; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.980; Smooth: 0.965

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id4q7hA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4q7hB01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4q7hC01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4q7hD01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432

8. Citations (1)

9. Files and Curves (10)