4rxr

The structure of GTP-dCTP-bound SAMHD1

Method: X-RAY DIFFRACTION Dmax: 98.3 Å Quality: EXCELLENT

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 Not recorded DCP 2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE × 8 MG MAGNESIUM ION × 4 GTP GUANOSINE-5'-TRIPHOSPHATE × 4 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 5.5;295 K;0.1 M lithium sulfate monohydrate, 0.1M sodium citrate tribasic dihydrate, and 20% w/v polyethylene glycol 1000 , pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K Resolution 2.12 Å R-free 0.213

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 22–539; UniProt 109–626 Author chain B; PDBConstruct 22–539; 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 4rxr

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id4rxr
Deposition date deposition_date2014-12-11
Structure title titleThe structure of GTP-dCTP-bound SAMHD1
Keywords keywordsHD-domain, hydrolase, dNTP and GTP binding, phosphorylation; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier31.22
Radius of gyration Rg (electron density) rg_electron30.66
Forward intensity I(0) i0214501000.00
Molecular weight molecular_weight115990.0 kDa
Excluded volume excluded_volume144630 ų
Envelope volume envelope_volume181140 ų
Hydration-shell volume shell_volume47149 ų
Envelope diameter envelope_diameter106.6
Shell Rg shell_rg39.47
Envelope Rg envelope_rg31.16
Shape Rg shape_rg30.64
Total Rg total_rg31.42
Total atoms total_atoms8150
Residues n_residues974
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 dmax98.3
Rg (real space) rg_real31.08
Rg uncertainty (real space) rg_real_error0.50
I(0) (real space) i0_real2.1450e+08
I(0) uncertainty (real space) i0_real_error2.8290e+06
Rg (reciprocal space) rg_reciprocal31.14
I(0) (reciprocal space) i0_reciprocal214500000.0000
Solution quality estimate total_estimate0.9010
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary36.6
Skewness Skewness skewness0.213
Kurtosis Kurtosis kurtosis-0.456
Angular range angular_range— – 0.2550 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha59380000.0000
Real-space data points n_real_points52
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.920; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.999; Smooth: 0.949

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id4rxrA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id4rxrB01
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)