4bzc

Crystal structure of the tetrameric dGTP-bound wild type SAMHD1 catalytic core

Method: X-RAY DIFFRACTION Dmax: 108.1 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 × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 113–626 Chain B; UniProt 113–626 Chain C; UniProt 113–626 Chain D; UniProt 113–626 Fragment:HD DOMAIN, RESIDUES 113-626 T8T 2'-deoxyguanosine-5'-O-(1-thiotriphosphate) × 12 MN MANGANESE (II) ION × 4 MG MAGNESIUM ION × 4 X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.7;100 MM BIS-TRIS PH 6.7 AND 25% (W/V) PEG1500 Resolution 2.88 Å R-free 0.245

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 105 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 37–550; UniProt 113–626 Author chain B; PDBConstruct 37–550; UniProt 113–626 Author chain C; PDBConstruct 37–550; UniProt 113–626 Author chain D; PDBConstruct 37–550; 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 4bzc

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id4bzc
Deposition date deposition_date2013-07-25
Structure title titleCrystal structure of the tetrameric dGTP-bound wild type SAMHD1 catalytic core
Keywords keywordsHYDROLASE, HIV RESTRICTION FACTOR, DNTPASE; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier35.76
Radius of gyration Rg (electron density) rg_electron35.34
Forward intensity I(0) i0797304000.00
Molecular weight molecular_weight227030.0 kDa
Excluded volume excluded_volume282480 ų
Envelope volume envelope_volume341740 ų
Hydration-shell volume shell_volume73980 ų
Envelope diameter envelope_diameter110.0
Shell Rg shell_rg45.78
Envelope Rg envelope_rg35.54
Shape Rg shape_rg35.33
Total Rg total_rg35.98
Total atoms total_atoms15920
Residues n_residues1904
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 dmax108.1
Rg (real space) rg_real35.49
Rg uncertainty (real space) rg_real_error0.43
I(0) (real space) i0_real7.9730e+08
I(0) uncertainty (real space) i0_real_error1.1760e+07
Rg (reciprocal space) rg_reciprocal35.66
I(0) (reciprocal space) i0_reciprocal797400000.0000
Solution quality estimate total_estimate0.8968
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary46.7
Skewness Skewness skewness0.088
Kurtosis Kurtosis kurtosis-0.511
Angular range angular_range— – 0.2200 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha555000000.0000
Real-space data points n_real_points45
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.917; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.962; Smooth: 0.941

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id4bzcA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4bzcB01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4bzcC01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4bzcD01
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)