High-resolution structure of NodZ fucosyltransferase involved in the biosynthesis of the nodulation factor

Krzysztof Brzezinski, Tomasz Stepkowski, Santosh Panjikar, Grzegorz Bujacz, Mariusz Jaskolski

Research output: Contribution to journalArticleResearchpeer-review

23 Citations (Scopus)

Abstract

The fucosyltransferase NodZ is involved in the biosynthesis of the nodulation factor in nitrogen-fixing symbiotic bacteria. It catalyzes α1,6 transfer of l-fucose from GDP-fucose to the reducing residue of the synthesized Nod oligosaccharide. We present the structure of the NodZ protein from Bradyrhizobium expressed in Escherichia coli and crystallized in the presence of phosphate ions in two crystal forms. The enzyme is arranged into two domains of nearly equal size. Although NodZ falls in one broad class (GT-B) with other two-domain glycosyltransferases, the topology of its domains deviates from the canonical Rossmann fold, with particularly high distortions in the N-terminal domain. Mutational data combined with structural and sequence alignments indicate residues of potential importance in GDP-fucose binding or in the catalytic mechanism. They are all clustered in three conserved sequence motifs located in the C-terminal domain.

Original languageEnglish
Pages (from-to)537-549
Number of pages13
JournalActa Biochimica Polonica
Volume54
Issue number3
DOIs
Publication statusPublished - 2007
Externally publishedYes

Keywords

  • Fucosyltransferase
  • Glycosyltransferase
  • Nitrogen fixation
  • Nodulation
  • NodZ

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