Abstract
One of the major proteins of the Saccharomyces cerevisiae cell wall, a beta-glucanase (BGL2 gene product), has been isolated and purified to homogeneity under conditions for preserving enzyme activity. The study of enzyme properties of the protein revealed that it is an endo-beta-1,3-glucanase and not an exoglucanase as reported previously (F. Klebl and W. Tanner, J. Bacteriol. 171:6259-6264, 1989). The examination of the glucanase structure showed that the lower apparent molecular mass of the protein (29 kDa) compared with what was calculated from the amino acid sequence of the enzyme (33.5 kDa) is due to anomalous migration in sodium dodecyl sulfate gels and not to posttranslational processing of the polypeptide chain. Of two potential N glycosylation sites at Asn-202 and Asn-284, only the latter site is glycosylated. The overproduction of the beta-glucanase from the high-copy-number plasmid brought about a significant decrease in the growth rate of transformed yeast cells.
MeSH Terms
Amino Acid Sequence
Cell Wall/enzymology
Fungal Proteins/chemistry,genetics,isolation & purification,metabolism
Genes, Fungal/genetics
Glucan Endo-1,3-beta-D-Glucosidase/chemistry,genetics,isolation & purification,metabolism
Glycosylation
Molecular Sequence Data
Molecular Weight
Peptide Fragments/chemistry
Polysaccharides/metabolism
Protein Processing, Post-Translational
Recombinant Proteins/isolation & purification,metabolism
Saccharomyces cerevisiae/enzymology,genetics,growth & development
Saccharomyces cerevisiae Proteins
Transformation, Genetic
Chemicals
Fungal Proteins
Peptide Fragments
Polysaccharides
Recombinant Proteins
Saccharomyces cerevisiae Proteins
BGL2 protein, S cerevisiae
Glucan Endo-1,3-beta-D-Glucosidase
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Mrsa V
Lehrstuhl für Zellbiologie, Universität Regensburg, Germany.
Klebl F
Tanner W
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