title: Raffinose-induced mutanase production from Trichoderma harzianum.
abstract: The enzyme alpha(1-->3),3-glucanohydrolase (referred to as mutanase) from the filamentous fungus Trichoderma harzianum OMZ 779 is capable of degrading the water-insoluble glucan in dental plaque. Previously, it was necessary to produce the glucan (referred to as mutan) in vitro for use as the sole carbon source and inducer of mutanase synthesis in fungal cultures. We report here that raffinose also induces the production of mutanase. The metabolism of raffinose differed from that of other sugars in metabolic end products and secreted protein profile. In addition to mutanase, we observed an approximately 15,000 M(r) protein that was also regulated by carbon source and by illumination conditions.
authors.affiliation: Department of Dental Research, University of Rochester School of Medicine and Dentistry, New York 14642.
authors.forename: R G
authors.initials: RG
authors.lastname: Quivey
authors.forename: P S
authors.initials: PS
authors.lastname: Kriger
mesh_terms: D004790:Enzyme Induction; D005656:Fungal Proteins / Q000378:metabolism; D006026:Glycoside Hydrolases / Q000096:biosynthesis*; D008027:Light; D011887:Raffinose / Q000378:metabolism*; D014242:Trichoderma / Q000187:drug effects / Q000201:enzymology* / Q000254:growth & development / Q000528:radiation effects
chemical_list: D005656:Fungal Proteins; D006026:Glycoside Hydrolases; C021780:exo-1,3-alpha-glucanase; D011887:Raffinose