Cloning, purification and preliminary crystallographic analysis of the Helicobacter pylori pseudaminic acid biosynthesis N-acetyltransferase PseH

Yu C. Liu, Abu I. Ud-Din, Anna Roujeinikova

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

Helicobacter pylori infection is the common cause of gastritis and duodenal and stomach ulcers, which have been linked to a higher risk of the development of gastric cancer. The motility that facilitates persistent infection requires functional flagella that are heavily glycosylated with 5,7-diacetamido-3,5,7,9-tetradeoxy-L-glycero-L-manno-nonulosonic acid (pseudaminic acid). Pseudaminic acid biosynthesis protein H (PseH) catalyzes the third step in its biosynthetic pathway, producing UDP-2,4-diacetamido-2,4,6-trideoxy-β-L-altropyranose. Crystals of H. pylori PseH have been grown by the hanging-drop vapour-diffusion method using diammonium tartrate as a precipitating agent. The crystals belonged to space group I222 or I212121, with unit-cell parameters a = 107.8, b = 145.4, c = 166.3 Å. A complete X-ray diffraction data set has been collected to 2.5 Å resolution using cryocooling conditions and synchrotron radiation.
Original languageEnglish
Pages (from-to)1276-1279
Number of pages4
JournalActa Crystallographica Section F: Structural Biology Communications
VolumeF70
Issue number9
DOIs
Publication statusPublished - 2014

Keywords

  • helicobacter pylori
  • N-acetyltransferase
  • acetyl-CoA
  • pseudaminic acid biosynthesis

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