Crystallization and preliminary X-ray analysis of an Escherichia coli purine repressor-hypoxanthine-DNA complex.


Journal Article

The purine repressor (PurR) is a DNA-binding protein, which together with a purine corepressor serves to regulate de novo purine and pyrimidine biosynthesis in Escherichia coli. PurR belongs to the structurally homologous lac repressor family of transcription regulators. A PurR-hypoxanthine-DNA complex has been crystallized, with DNA encompassing the high affinity purF operator site and which is 16 base-pairs long with 5'-deoxynucleoside overhangs on each complementary strand. The crystals diffract to better than 2.6 A and take the orthorhombic space group C222(1), with unit cell dimensions a = 175.9 A, b = 94.8 A and c = 81.8 A. The structure determination of this PurR-hypoxanthine-DNA complex will provide the first high resolution view of a Lacl member-DNA complex.

Full Text

Duke Authors

Cited Authors

  • Schumacher, MA; Choi, KY; Zalkin, H; Brennan, RG

Published Date

  • September 23, 1994

Published In

Volume / Issue

  • 242 / 3

Start / End Page

  • 302 - 305

PubMed ID

  • 8089849

Pubmed Central ID

  • 8089849

International Standard Serial Number (ISSN)

  • 0022-2836

Digital Object Identifier (DOI)

  • 10.1006/jmbi.1994.1580


  • eng

Conference Location

  • England