Yeast beta-glucanases: a complex system of secreted enzymes. 1988

C Nombela, and M Molina, and R Cenamor, and M Sanchez
Departamento de MicrobiologĂ­a, Facultad de Farmacia, Universidad Complutense, Madrid, Spain.

The complement of glucan-hydrolysing enzymes produced by yeast species is considered to be relevant to morphogenesis, since this polysaccharide is the major structural component of the yeast cell wall. beta-glucanase systems of different species consist of both 1,3-beta- and 1,6-beta-hydrolases, which exert their action by either an exo- or an endo-splitting mechanism. The diversity of beta-glucanase systems, even among related species, is striking. The enzymes are produced for export, and the active forms of some of them seem to be generated upon secretion. Genetic approaches and the cloning of the glucanase genes are being used to clarify the biological role of the different enzymes. These also offer a possibility for genetic analysis of the functions related to cell wall dynamics with potential applications in biotechnology.

UI MeSH Term Description Entries
D005959 Glucosidases Enzymes that hydrolyze O-glucosyl-compounds. (Enzyme Nomenclature, 1992) EC 3.2.1.-. Glucosidase
D001617 beta-Glucosidase An exocellulase with specificity for a variety of beta-D-glycoside substrates. It catalyzes the hydrolysis of terminal non-reducing residues in beta-D-glucosides with release of GLUCOSE. Cellobiases,Amygdalase,Cellobiase,Emulsion beta-D-Glucosidase,Gentiobiase,Emulsion beta D Glucosidase,beta Glucosidase,beta-D-Glucosidase, Emulsion
D014644 Genetic Variation Genotypic differences observed among individuals in a population. Genetic Diversity,Variation, Genetic,Diversity, Genetic,Diversities, Genetic,Genetic Diversities,Genetic Variations,Variations, Genetic
D015003 Yeasts A general term for single-celled rounded fungi that reproduce by budding. Brewers' and bakers' yeasts are SACCHAROMYCES CEREVISIAE; therapeutic dried yeast is YEAST, DRIED. Yeast
D015966 Gene Expression Regulation, Fungal Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in fungi. Fungal Gene Expression Regulation,Regulation of Gene Expression, Fungal,Regulation, Gene Expression, Fungal
D043326 Glucan 1,3-beta-Glucosidase An exocellulase with specificity for 1,3-beta-D-glucasidic linkages. It catalyzes hydrolysis of beta-D-glucose units from the non-reducing ends of 1,3-beta-D-glucans, releasing GLUCOSE. 1,3-beta-Glucanase,Beta-1,3-Glucanase Type II,Exo-1,3 beta-D-Glucosidase,1,3 beta Glucanase,1,3-beta-Glucosidase, Glucan,Beta 1,3 Glucanase Type II,Exo 1,3 beta D Glucosidase,Glucan 1,3 beta Glucosidase,beta-D-Glucosidase, Exo-1,3

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