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6obj

Structure of a DNA-bound dimer extracted from filamentous SgrAI endonuclease in its activated form

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

SgraIR restriction enzyme

Streptomyces griseus

UniProt Q9F6L0

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Homooligomer Protein 20 DNA 20 DNA (26-MER) × 20 MAGNESIUM ION × 20 Consistent with all polymers
2 Protein–DNA Homooligomer Protein 2 DNA 2 DNA (26-MER) × 2 MAGNESIUM ION × 2 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer
7s8d

1 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
3dpg 3dvo 3dvo 3dw9 3mq6 3mq6 3mq6 3mq6 3mqy 3n78 3n7b 4c3g

17 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name Q9F6L0_STRGR
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–339； UniProt 1–339 Author chain B； PDBConstruct 1–339； UniProt 1–339

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id6obj
Deposition date deposition_date2019-03-20
Structure title titleStructure of a DNA-bound dimer extracted from filamentous SgrAI endonuclease in its activated form
Keywords keywords;restriction endonuclease, DNAse, allostery, bacterial innate immunity, filament, hyper-activation, substrate specificity, HYDROLASE-DNA complex ;; HYDROLASE/DNA
Experimental Method methodELECTRON MICROSCOPY
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

6obj__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

6obj__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 109 1010 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

6obj__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）76.54 Å
Rg (electron density)77.26 Å
Total Rg77.19 Å
Atom count64060
Residues7280
Excluded volume1100500 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 6obj__assembly_1__model_1 40-meric （40） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 6obj__assembly_2__model_1 tetrameric （4） Excluded — —
Exclusion reason： Auxiliary symmetry representation; not a complete or representative biological assembly.
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (3)

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id6objA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology91 — Restriction Endonuclease
Homologous superfamily homologous superfamily10 —
Domain ID domain_id6objB00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology91 — Restriction Endonuclease
Homologous superfamily homologous superfamily10 —
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7. Citations (1)