Crystallization and preliminary X-ray diffraction analysis of two N-terminal fragments of the DNA-cleavage domain of topoisomerase IV from Staphylococcus aureus

Acta Crystallogr Sect F Struct Biol Cryst Commun. 2006 Nov 1;62(Pt 11):1164-7. doi: 10.1107/S1744309106044150. Epub 2006 Oct 28.

Abstract

DNA topoisomerase IV removes undesirable topological features from DNA molecules in order to help maintain chromosome stability. Two constructs of 56 and 59 kDa spanning the DNA-cleavage domain of the A subunit of topoisomerase IV from Staphylococcus aureus (termed GrlA56 and GrlA59) have been crystallized. Crystals were grown at 291 K using the sitting-drop vapour-diffusion technique with PEG 3350 as a precipitant. Preliminary X-ray analysis revealed that GrlA56 crystals belong to space group P2(1), diffract to a resolution of 2.9 A and possess unit-cell parameters a = 83.6, b = 171.5, c = 87.8 A, beta = 90.1 degrees, while crystals of GrlA59 belong to space group P2(1)2(1)2, with unit-cell parameters a = 41.5, b = 171.89, c = 87.9 A. These crystals diffract to a resolution of 2.8 A. This is the first report of the crystallization and preliminary X-ray analysis of the DNA-cleavage domain of a topoisomerase IV from a Gram-positive organism.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Proteins / chemistry
  • Bacterial Proteins / isolation & purification
  • DNA Topoisomerase IV / chemistry*
  • DNA Topoisomerase IV / isolation & purification
  • Peptide Fragments / chemistry
  • Peptide Fragments / isolation & purification
  • Staphylococcus aureus / enzymology*
  • X-Ray Diffraction

Substances

  • Bacterial Proteins
  • Peptide Fragments
  • DNA Topoisomerase IV