1CY4

COMPLEX OF E.COLI DNA TOPOISOMERASE I WITH 5'pTpTpTp3'


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Protein-nucleotide interactions in E. coli DNA topoisomerase I.

Feinberg, H.Changela, A.Mondragon, A.

(1999) Nat Struct Biol 6: 961-968

  • DOI: 10.1038/13333
  • Primary Citation of Related Structures:  
    1CY0, 1CY1, 1CY2, 1CY4, 1CY6, 1CY7, 1CY8

  • PubMed Abstract: 
  • DNA topoisomerases are the enzymes responsible for controlling and maintaining the topological states of DNA. Type IA enzymes work by transiently breaking the phosphodiester backbone of one strand to allow passage of another strand through the break. The protein has to perform complex rearrangements of the DNA, and hence it is likely that different regions of the enzyme bind DNA with different affinities ...

    DNA topoisomerases are the enzymes responsible for controlling and maintaining the topological states of DNA. Type IA enzymes work by transiently breaking the phosphodiester backbone of one strand to allow passage of another strand through the break. The protein has to perform complex rearrangements of the DNA, and hence it is likely that different regions of the enzyme bind DNA with different affinities. In order to identify some of the DNA binding sites in the protein, we have solved the structures of several complexes of the 67 kDa N-terminal fragment of Escherichia coli DNA topoisomerase I with mono- and trinucleotides. There are five different binding sites in the complexes, one of which is adjacent to the active site. Two other sites are in the central hole of the protein and may represent general DNA binding regions. The positions of these sites allow us to identify different DNA binding regions and to understand their possible roles in the catalytic cycle.


    Organizational Affiliation

    Department of Biochemistry, Molecular Biology and Cell Biology, Northwerstern University, 2153 Sheridan Road, Evanston, Illinois 60208, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA TOPOISOMERASE IA599Escherichia coli K-12Mutation(s): 0 
Gene Names: topAsupXb1274JW1266
EC: 5.99.1.2 (PDB Primary Data), 5.6.2.1 (UniProt)
UniProt
Find proteins for P06612 (Escherichia coli (strain K12))
Explore P06612 
Go to UniProtKB:  P06612
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TMP (Subject of Investigation/LOI)
Query on TMP

Download Ideal Coordinates CCD File 
E [auth A]THYMIDINE-5'-PHOSPHATE
C10 H15 N2 O8 P
GYOZYWVXFNDGLU-XLPZGREQSA-N
 Ligand Interaction
PO4
Query on PO4

Download Ideal Coordinates CCD File 
B [auth A], C [auth A], D [auth A]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.95α = 90
b = 78.76β = 90
c = 141.71γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement
REFMACrefinement
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-03-08
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance