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Kinetics of enzymatic lysis and disruption of yeast cells: I. Evaluation of two lytic systems with different properties
Author(s) -
Hunter J. B.,
Asenjo J. A.
Publication year - 1987
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260300403
Subject(s) - lytic cycle , lysis , kinetics , yeast , enzyme , chemistry , biochemistry , biology , physics , genetics , quantum mechanics , virus
Many microorganisms produce enzymes which lyse the walls of yeasts, fungi, and bacteria. The proportions of different enzyme activities present in the lytic system, their action patterns, synergism, and dependence on inhibitors, constitute the activity profile of the lytic system. Taken together, the activity profile and process conditions for lysis determine the reaction rate and the distribution of products from lysis of any given type of cells. Kinetics of glucan hydrolysis, proteolysis, and lysis of brewer's yeast were compared for two extracellular yeast–lytic enzyme systems with different properties. The enzyme sources used were filtered culture broths from Cytophaga sp. NCIB 9497 grown in batch culture and from Oerskovia xanthineolytica LL‐G109, grown under carbon limitation in continuous culture. Rate and extent of cell hydrolysis, and the accumulation of soluble proteins, peptides, and carbohydrates from the lysed yeast cells, are discussed in terms of the activity profiles and potential applications of the two enzyme systems.