Cellvibrio japonicus alpha-L-arabinanase 43A has a novel five-blade beta-propeller fold

D Nurizzo, J P Turkenburg, S J Charnock, S M Roberts, E J Dodson, V A McKie, E J Taylor, H J Gilbert, G J Davies

Research output: Contribution to journalArticlepeer-review

Abstract

Cellvibrio japonicus arabinanase Arb43A hydrolyzes the -1,5-linked L-arabinofuranoside backbone of plant cell wall arabinans. The three-dimensional structure of Arb43A, determined at 1.9 Angstrom resolution, reveals a five-bladed beta-propeller fold. Arb43A is the first enzyme known to display this topology. A long V-shaped surface groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller. Three carboxylates deep in the active site groove provide the general acid and base components for glycosidic bond hydrolysis with inversion of anomeric configuration.

Original languageEnglish
Pages (from-to)665-668
Number of pages4
JournalNature Structural Biology
Volume9
Issue number9
DOIs
Publication statusPublished - Sept 2002

Keywords

  • GLUCURONIDASE
  • REPLACEMENT
  • REFINEMENT
  • HYDROLASES
  • DIVERSITY
  • DOMAIN
  • MODE
  • MAPS

Cite this