5ao2

Crystal structure of human SAMHD1 (amino acid residues 115-583) R164A variant bound to dGTP

Method: X-RAY DIFFRACTION Dmax: 119.5 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 115–583 Chain B; UniProt 115–583 Chain C; UniProt 115–583 Chain D; UniProt 115–583 Fragment:UNP RESIDUES 115-583 Mutation:YES FE FE (III) ION × 4 DGT 2'-DEOXYGUANOSINE-5'-TRIPHOSPHATE × 4 X-RAY DIFFRACTION X-ray crystallization conditions:0.2 M SODIUM CITRATE, 0.1 M BIS TRIS PROPANE-HCL, 20% PEG 3350, PH 8.5 Resolution 2.97 Å R-free 0.234

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 23–491; UniProt 115–583 Author chain B; PDBConstruct 23–491; UniProt 115–583 Author chain C; PDBConstruct 23–491; UniProt 115–583 Author chain D; PDBConstruct 23–491; UniProt 115–583

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 5ao2

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 5ao2
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2. Structure Basics 2. Structure Basics

Entry ID entry_id5ao2
Deposition date deposition_date2015-09-09
Structure title titleCrystal structure of human SAMHD1 (amino acid residues 115-583) R164A variant bound to dGTP
Keywords keywordsHYDROLASE, DEOXYNUCLEOSIDE TRIPHOSPHATE TRIPHOSPHOHYDROLASE, HIV RESTRICTION FACTOR; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier38.36
Radius of gyration Rg (electron density) rg_electron37.78
Forward intensity I(0) i0560939000.00
Molecular weight molecular_weight193140.0 kDa
Excluded volume excluded_volume241050 ų
Envelope volume envelope_volume312280 ų
Hydration-shell volume shell_volume65827 ų
Envelope diameter envelope_diameter118.7
Shell Rg shell_rg46.41
Envelope Rg envelope_rg37.28
Shape Rg shape_rg37.77
Total Rg total_rg38.29
Total atoms total_atoms13602
Residues n_residues1712
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 dmax119.5
Rg (real space) rg_real38.14
Rg uncertainty (real space) rg_real_error0.87
I(0) (real space) i0_real5.6090e+08
I(0) uncertainty (real space) i0_real_error8.8920e+06
Rg (reciprocal space) rg_reciprocal38.28
I(0) (reciprocal space) i0_reciprocal561000000.0000
Solution quality estimate total_estimate0.9027
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary46.6
Skewness Skewness skewness0.159
Kurtosis Kurtosis kurtosis-0.550
Angular range angular_range— – 0.2050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha93420000.0000
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: 0.985; Smooth: 0.935

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 6 domains

CATH v4.4 (6 domains)

Domain ID domain_id5ao2A01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id5ao2B01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id5ao2B02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily2760
Domain ID domain_id5ao2C01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id5ao2D01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology3210 — Hypothetical protein af1432
Homologous superfamily homologous superfamily10 — Hypothetical protein af1432
Domain ID domain_id5ao2D02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily2760

8. Citations (1)

9. Files and Curves (10)