8gb2

Crystal structure of Apo-SAMHD1

Method: X-RAY DIFFRACTION Dmax: 117.4 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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 113–626 Chain D; UniProt 113–626 Not recorded FE FE (III) ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.3;293 K;17% PEG3350, 0.15 M Ammonium citrate pH 7.3, 293 K, 5 mg/mL, 1 uL protein + 2 uL ML. Resolution 3.07 Å R-free 0.250
2 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 113–626 Chain C; UniProt 113–626 Not recorded FE FE (III) ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.3;293 K;17% PEG3350, 0.15 M Ammonium citrate pH 7.3, 293 K, 5 mg/mL, 1 uL protein + 2 uL ML. Resolution 3.07 Å R-free 0.250

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 3–516; UniProt 113–626 Author chain B; PDBConstruct 3–516; UniProt 113–626 Author chain C; PDBConstruct 3–516; UniProt 113–626 Author chain D; PDBConstruct 3–516; UniProt 113–626

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 8gb2

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8gb2
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8gb2
Deposition date deposition_date2023-02-24
Structure title titleCrystal structure of Apo-SAMHD1
Keywords keywordsSAMHD1, dNTPase, hydrolase, dimer, dimeric; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier38.21
Radius of gyration Rg (electron density) rg_electron37.75
Forward intensity I(0) i0618647000.00
Molecular weight molecular_weight206330.0 kDa
Excluded volume excluded_volume259390 ų
Envelope volume envelope_volume332710 ų
Hydration-shell volume shell_volume69839 ų
Envelope diameter envelope_diameter121.2
Shell Rg shell_rg46.51
Envelope Rg envelope_rg37.36
Shape Rg shape_rg37.72
Total Rg total_rg38.36
Total atoms total_atoms28955
Residues n_residues1777
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 dmax117.4
Rg (real space) rg_real37.99
Rg uncertainty (real space) rg_real_error0.80
I(0) (real space) i0_real6.1860e+08
I(0) uncertainty (real space) i0_real_error9.9360e+06
Rg (reciprocal space) rg_reciprocal38.13
I(0) (reciprocal space) i0_reciprocal618700000.0000
Solution quality estimate total_estimate0.8943
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary48.7
Skewness Skewness skewness0.163
Kurtosis Kurtosis kurtosis-0.500
Angular range angular_range— – 0.2050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha118100000.0000
Real-space data points n_real_points42
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.937; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.978; Smooth: 0.832

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

8. Citations (1)

9. Files and Curves (10)