Crystallization, preliminary X-ray analysis and biophysical characterization of HPr kinase/phosphatase of Mycoplasma pneumoniae.

Published

Journal Article

The Mycoplasma pneumoniae HPr kinase/phosphatase (HPrK/P) is a member of a large family of enzymes which are central to carbon regulation in Gram-positive bacteria. The full-length M. pneumonia HPrK/P was crystallized from solutions of polyethylene glycol 8000 and KCl or NaCl which also contained the non-hydrolysable ATP analog adenosine 5'-[beta, gamma-methylene]triphosphate (AMPPCP). The crystals belong to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 117.1, b = 127.7, c = 170.7 A. A complete X-ray intensity data set has been collected and processed to 2.50 A resolution. The slow self-rotation function revealed the presence of a sixfold axis. Dynamic light-scattering (DLS) experiments indicated a molecular weight of 197 kDa for HPrK/P in the absence of AMPPCP and of 217 kDa in the presence of the ATP analog. Thus, the biophysical and crystallographic data suggest that HPrK/P is a functional hexamer that undergoes an ATP-binding-induced conformational change.

Full Text

Duke Authors

Cited Authors

  • Steinhauer, K; Allen, GS; Hillen, W; Stülke, J; Brennan, RG

Published Date

  • March 2002

Published In

Volume / Issue

  • 58 / Pt 3

Start / End Page

  • 515 - 518

PubMed ID

  • 11856840

Pubmed Central ID

  • 11856840

Electronic International Standard Serial Number (EISSN)

  • 1399-0047

International Standard Serial Number (ISSN)

  • 0907-4449

Digital Object Identifier (DOI)

  • 10.1107/s090744490102145x

Language

  • eng