6xu1

Crystal structure of tetrameric human H215A-SAMHD1 (residues 109-626) with GTP, dAMPNPP and Mg

Method: X-RAY DIFFRACTION Dmax: 181.4 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 × 13 DZ4 2'-deoxy-5'-O-[(R)-hydroxy{[(R)-hydroxy(phosphonooxy)phosphoryl]amino}phosphoryl]adenosine × 8 GTP GUANOSINE-5'-TRIPHOSPHATE × 4 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, 0.1 M MgCl2 Resolution 2.20 Å R-free 0.202
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 DZ4 2'-deoxy-5'-O-[(R)-hydroxy{[(R)-hydroxy(phosphonooxy)phosphoryl]amino}phosphoryl]adenosine × 8 GTP GUANOSINE-5'-TRIPHOSPHATE × 4 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, 0.1 M MgCl2 Resolution 2.20 Å R-free 0.202

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 6xu1

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6xu1
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6xu1
Deposition date deposition_date2020-01-17
Structure title titleCrystal structure of tetrameric human H215A-SAMHD1 (residues 109-626) with GTP, dAMPNPP 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_guinier54.90
Radius of gyration Rg (electron density) rg_electron55.20
Forward intensity I(0) i02965490000.00
Molecular weight molecular_weight450950.0 kDa
Excluded volume excluded_volume561000 ų
Envelope volume envelope_volume732890 ų
Hydration-shell volume shell_volume107850 ų
Envelope diameter envelope_diameter184.7
Shell Rg shell_rg59.14
Envelope Rg envelope_rg54.82
Shape Rg shape_rg55.20
Total Rg total_rg55.30
Total atoms total_atoms31642
Residues n_residues3816
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 dmax181.4
Rg (real space) rg_real55.04
Rg uncertainty (real space) rg_real_error1.63
I(0) (real space) i0_real2.9650e+09
I(0) uncertainty (real space) i0_real_error5.7480e+07
Rg (reciprocal space) rg_reciprocal54.75
I(0) (reciprocal space) i0_reciprocal2964000000.0000
Solution quality estimate total_estimate0.8396
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary50.0
Skewness Skewness skewness0.359
Kurtosis Kurtosis kurtosis-0.690
Angular range angular_range— – 0.1450 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha1463000000.0000
Real-space data points n_real_points30
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.776; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.995; Smooth: 0.588

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (6)

8. Citations (1)

9. Files and Curves (10)