Identification of the cellulose synthase genes from the Oomycete Saprolegnia monoica and effect of cellulose synthesis inhibitors on gene expression and enzyme activity
2009 (English)In: Fungal Genetics and Biology, ISSN 1087-1845, E-ISSN 1096-0937, Vol. 46, no 10, 759-767 p.Article in journal (Refereed) Published
Cellulose biosynthesis is a vital but yet poorly understood biochemical process in Oomycetes. Here, we report the identification and characterization of the cellulose synthase genes (CesA) from Saprolegnia monoica. Southern blot experiments revealed the occurrence of three CesA homologues in this species and phylogenetic analyses confirmed that Oomycete CesAs form a clade of their own. All gene products contained the D,D,D,QXXRW signature of most processive glycosyltransferases, including cellulose synthases. However, their N-terminal ends exhibited Oomycete-specific domains, i.e. Pleckstrin Homology domains, or conserved domains of an unknown function together with additional putative transmembrane domains. Mycelial growth was inhibited in the presence of the cellulose biosynthesis inhibitors 2,6-dichlorobenzonitrile or Congo Red. This inhibition was accompanied by a higher expression of all CesA genes in the mycelium and increased in vitro glucan synthase activities. Altogether, our data strongly suggest a direct involvement of the identified CesA genes in cellulose biosynthesis.
Place, publisher, year, edition, pages
2009. Vol. 46, no 10, 759-767 p.
Cellulose synthase genes, Cell wall biosynthesis, Congo Red, 2, 6-Dichlorobenzonitrile (DCB), Oomycetes, Saprolegnia monoica, fungus saprolegnia, acetobacter-xylinum, catalytic subunit, chitin, synthase, plasma-membrane, wall chemistry, cell-walls, congo red, biosynthesis, dna
IdentifiersURN: urn:nbn:se:kth:diva-18715DOI: 10.1016/j.fgb.2009.07.001ISI: 000269368000005ScopusID: 2-s2.0-68549136474OAI: oai:DiVA.org:kth-18715DiVA: diva2:336762
QC 201005252010-08-052010-08-052011-05-31Bibliographically approved