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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Extracellular proteins secreted by the basidiomycete Schizophyllum commune in response to carbon source.

The secretion of 1,4-beta-D-glucanases by the basidiomycete Schizophyllum commune in response to cellulose or cellobiose has been studied. The proteins were labeled with 35S, and the secretion of enzymes was measured by beta-glucosidase and carboxymethyl cellulase activities and by immunoprecipitation with specific antibodies. The antigen proteins used were a beta-glucosidase (Mr, 93,000), an avicelase (avicelase II; Mr, 64,000), and a carboxymethyl cellulose (carboxymethyl cellulase I; Mr 41,000). The beta-glucosidase was initially secreted as an Mr 110,000 form, which was followed later by lower-molecular-weight (88,000 to 93,000) forms. The avicelase II, which accounted for about 50% of the secreted labeled protein, had an Mr of 64,000. Secretion of the related avicelase I (Mr 61,000) followed later. The carboxymethyl cellulose I was secreted in two molecular weight forms, Mr 44,000 and 41,000. The evidence is consistent with the idea that three genes account for the secreted glucanase activities. Other species result from different glycosylation or proteolytic cleavage processing, which may occur during or after secretion. The beta-glucosidase secretion appears to be regulated differently than that of avicelase II or carboxymethyl cellulase I; the latter two were regulated coordinately under the conditions used in this work. No common immune determinants between the three antigens were observed.[1]

References

  1. Extracellular proteins secreted by the basidiomycete Schizophyllum commune in response to carbon source. Willick, G.E., Morosoli, R., Seligy, V.L., Yaguchi, M., Desrochers, M. J. Bacteriol. (1984) [Pubmed]
 
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