3m8s

Crystal structure of the large fragment of DNA polymerase I from Thermus aquaticus in a closed ternary complex with trapped 4'-methylated dTTP

Method: X-RAY DIFFRACTION Dmax: 81.3 Å Quality: REASONABLE

1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA polymerase I, thermostable

Thermus aquaticus

UniProt P19821

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–DNA Monomer Protein × 1 DNA 2 PDB declaration: trimeric(3) Consistent with all polymer counts Chain A; UniProt 293–832 Fragment:KLENOW FRAGMENT ;DNA (5'-D(*GP*AP*CP*CP*AP*CP*GP*GP*CP*GP*CP*(DOC))-3') ; × 1 ;DNA (5'-D(*AP*AP*AP*AP*GP*GP*CP*GP*CP*CP*GP*TP*GP*GP*TP*C)-3') ; × 1 HXB 4'-methylthymidine 5'-(tetrahydrogen triphosphate) × 1 MG MAGNESIUM ION × 2 GOL GLYCEROL × 3 PEG DI(HYDROXYETHYL)ETHER × 1 15P POLYETHYLENE GLYCOL (N=34) × 1 ACT ACETATE ION × 4 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;291 K;30% (w/v) PEG 8000, 0.2M ammonium acetate, 0.02M magnesium acetate, 0.05M sodium cacodylate, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 291K Resolution 2.20 Å R-free 0.224

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.

81 other PDB entries and 83 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name DPO1_THEAQ
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–540; UniProt 293–832

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 3m8s

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3m8s
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3m8s
Deposition date deposition_date2010-03-19
Structure title titleCrystal structure of the large fragment of DNA polymerase I from Thermus aquaticus in a closed ternary complex with trapped 4'-methylated dTTP
Keywords keywords;DNA, DNA polymerase, DNA replication, nucleotides, modified nucleotide, artificial nucleotide, nucleotide probes, DNA-binding, DNA-directed DNA polymerase, Nucleotidyltransferase, Transferase, Transferase-DNA complex ;; Transferase/DNA
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier25.55
Radius of gyration Rg (electron density) rg_electron24.93
Forward intensity I(0) i093834400.00
Molecular weight molecular_weight70584.0 kDa
Excluded volume excluded_volume86040 ų
Envelope volume envelope_volume103360 ų
Hydration-shell volume shell_volume33659 ų
Envelope diameter envelope_diameter85.2
Shell Rg shell_rg32.96
Envelope Rg envelope_rg24.93
Shape Rg shape_rg24.97
Total Rg total_rg25.57
Total atoms total_atoms4935
Residues n_residues566
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 dmax81.3
Rg (real space) rg_real25.42
Rg uncertainty (real space) rg_real_error0.39
I(0) (real space) i0_real9.3830e+07
I(0) uncertainty (real space) i0_real_error1.0620e+06
Rg (reciprocal space) rg_reciprocal25.46
I(0) (reciprocal space) i0_reciprocal93840000.0000
Solution quality estimate total_estimate0.7019
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary31.5
Skewness Skewness skewness0.187
Kurtosis Kurtosis kurtosis-0.388
Angular range angular_range— – 0.3100 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha14700000.0000
Real-space data points n_real_points63
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.881; Stabil: 1.000; Sysdev: 0.164; Positv: 1.000; Valcen: 0.988; Smooth: 0.996

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (10)

7. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3m8sa1
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.55 — Ribonuclease H-like motif
Superfamily Superfamily superfamilyc.55.3 — Ribonuclease H-like
Family Family familyc.55.3.5 — DnaQ-like 3'-5' exonuclease
Domain ID domain_idd3m8sa2
Class classe — Multi-domain proteins (alpha and beta)
Fold Fold folde.8 — DNA/RNA polymerases
Superfamily Superfamily superfamilye.8.1 — DNA/RNA polymerases
Family Family familye.8.1.1 — DNA polymerase I

CATH v4.4 (4 domains)

Domain ID domain_id3m8sA01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily10 — Ribonuclease H-like superfamily/Ribonuclease H
Domain ID domain_id3m8sA02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1060 — Taq DNA Polymerase; Chain T, domain 4
Homologous superfamily homologous superfamily10 — Taq DNA Polymerase; Chain T, domain 4
Domain ID domain_id3m8sA03
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily370
Domain ID domain_id3m8sA04
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology150 — DNA polymerase; domain 1
Homologous superfamily homologous superfamily20 — 5' to 3' exonuclease, C-terminal subdomain

8. Citations (1)

9. Files and Curves (10)