1VCC

AMINO TERMINAL 9KDA DOMAIN OF VACCINIA VIRUS DNA TOPOISOMERASE I RESIDUES 1-77, EXPERIMENTAL ELECTRON DENSITY FOR RESIDUES 1-77

• PDB DOI: https://doi.org/10.2210/pdb1VCC/pdb

• Classification: DNA BINDING
• Organism(s): Vaccinia virus WR
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-10-02 Released: 1996-03-08 
• Deposition Author(s): Sharma, A., Hanai, R., Mondragon, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.287 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 

Literature

Crystal structure of the amino-terminal fragment of vaccinia virus DNA topoisomerase I at 1.6 A resolution.

Sharma, A., Hanai, R., Mondragon, A.

(1994) Structure 2: 767-777

• PubMed: 7994576 
• DOI: https://doi.org/10.1016/s0969-2126(94)00077-8
• Primary Citation of Related Structures:  
  1VCC


• PubMed Abstract: 
  

  Vaccinia virus, a cytoplasmically-replicating poxvirus, encodes a type I DNA topoisomerase that is biochemically similar to eukaryotic-like DNA topoisomerases I, and which has been widely studied as a model topoisomerase. It is the smallest topoisomerase known and is unusual in that it is resistant to the potent chemotherapeutic agent camptothecin.

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Organizational Affiliation: 

Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, IL 60208-3500.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 9.07 kDa 
• Atom Count: 702 
• Modelled Residue Count: 77 
• Deposited Residue Count: 77 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA TOPOISOMERASE I	A	77	Vaccinia virus WR	Mutation(s): 0  EC: 5.99.1.2
UniProt
Find proteins for P68698 (Vaccinia virus (strain Western Reserve)) Explore P68698  Go to UniProtKB:  P68698

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.287 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.46	α = 90
b = 42.51	β = 90
c = 60.85	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-03-08 
Deposition Author(s): Sharma, A., Hanai, R., Mondragon, A.

Revision History  

• Version 1.0: 1996-03-08
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Other