7a5y

Crystal structure of tetrameric human H215A-SAMHD1 (residues 109-626) with Rp-dGTP-alphaS (T8T) and Mg

Method: X-RAY DIFFRACTION Dmax: 180.4 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 × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 109–626 Chain B; UniProt 109–626 Chain C; UniProt 109–626 Chain D; UniProt 109–626 Mutation:H215A FE FE (III) ION × 4 MG MAGNESIUM ION × 12 T8T 2'-deoxyguanosine-5'-O-(1-thiotriphosphate) × 12 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6;293 K;0.1 M Bistris methane-HCl pH 6, 15% (w/v) PEG 3350, 0.15 M Li2SO4 Resolution 2.29 Å R-free 0.240
2 Protein homooligomer Homooligomer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain E; UniProt 109–626 Chain F; UniProt 109–626 Chain G; UniProt 109–626 Chain H; UniProt 109–626 Mutation:H215A FE FE (III) ION × 4 MG MAGNESIUM ION × 12 T8T 2'-deoxyguanosine-5'-O-(1-thiotriphosphate) × 12 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6;293 K;0.1 M Bistris methane-HCl pH 6, 15% (w/v) PEG 3350, 0.15 M Li2SO4 Resolution 2.29 Å R-free 0.240

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 3–520; UniProt 109–626 Author chain B; PDBConstruct 3–520; UniProt 109–626 Author chain C; PDBConstruct 3–520; UniProt 109–626 Author chain D; PDBConstruct 3–520; UniProt 109–626 Author chain E; PDBConstruct 3–520; UniProt 109–626 Author chain F; PDBConstruct 3–520; UniProt 109–626 Author chain G; PDBConstruct 3–520; UniProt 109–626 Author chain H; PDBConstruct 3–520; 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 7a5y

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7a5y
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7a5y
Deposition date deposition_date2020-08-24
Structure title titleCrystal structure of tetrameric human H215A-SAMHD1 (residues 109-626) with Rp-dGTP-alphaS (T8T) and Mg
Keywords keywordstriphosphohydrolase, metallo-enzyme, binuclear, HD, HYDROLASE; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier51.32
Radius of gyration Rg (electron density) rg_electron51.34
Forward intensity I(0) i02747820000.00
Molecular weight molecular_weight429750.0 kDa
Excluded volume excluded_volume533040 ų
Envelope volume envelope_volume691680 ų
Hydration-shell volume shell_volume107890 ų
Envelope diameter envelope_diameter169.6
Shell Rg shell_rg57.60
Envelope Rg envelope_rg50.81
Shape Rg shape_rg51.35
Total Rg total_rg51.48
Total atoms total_atoms30122
Residues n_residues3650
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 dmax180.4
Rg (real space) rg_real51.31
Rg uncertainty (real space) rg_real_error1.42
I(0) (real space) i0_real2.7480e+09
I(0) uncertainty (real space) i0_real_error5.5740e+07
Rg (reciprocal space) rg_reciprocal51.31
I(0) (reciprocal space) i0_reciprocal2748000000.0000
Solution quality estimate total_estimate0.7872
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary52.4
Skewness Skewness skewness0.298
Kurtosis Kurtosis kurtosis-0.628
Angular range angular_range— – 0.1550 −1
Current regularization parameter α current_alpha0.0002
Highest regularization parameter α highest_alpha955300000.0000
Real-space data points n_real_points32
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.755; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.966; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

8. Citations (1)

9. Files and Curves (10)