A novel xylosylphosphotransferase activity discovered in Cryptococcus neoformans

Morgann C Reilly, Steven B Levery, Sherry A Castle, J Stacey Klutts, Tamara L Doering

14 Citations (Scopus)

Abstract

Cryptococcus neoformans is a fungal pathogen that causes serious disease in immunocompromised individuals. The organism produces a distinctive polysaccharide capsule that is necessary for its virulence, a predominantly polysaccharide cell wall, and a variety of protein- and lipid-linked glycans. The glycan synthetic pathways of this pathogen are of great interest. Here we report the detection of a novel glycosylphosphotransferase activity in C. neoformans, identification of the corresponding gene, and characterization of the encoded protein. The observed activity is specific for UDP-xylose as a donor and for mannose acceptors and forms a xylose-alpha-1-phosphate-6-mannose linkage. This is the first report of a xylosylphosphotransferase activity in any system.
Original languageEnglish
JournalJournal of Biological Chemistry
Volume284
Issue number52
Pages (from-to)36118-27
Number of pages9
ISSN0021-9258
DOIs
Publication statusPublished - 2009

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