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Appl Environ Microbiol. 1968 September; 16(9): 1370-1374
Copyright © 1968 American Society for Microbiology. All Rights Reserved.

Extracellular Proteinases of Yeasts and Yeastlike Fungi¹

Department of Biology, Georgia State College, Atlanta, Georgia 30303
Institute of Marine Sciences, University of Miami, Miami, Florida 33149

ABSTRACT

Approximately 800 yeasts and other fungi, representing over 70 species, were tested for extracellular caseinolysis. Isolates of a variety of genera, including Aureobasidium, Cephalosporium, Endomycopsis, Kluyveromyces, and numerous sporobolomycetes, demonstrated significant proteolytic activity. Caseinolysis was not necessarily correlated with gelatin liquefaction or with albuminolysis. Numerous fungi showed significant proteolysis at 5 C. The most active organisms were isolates of Candida lipolytica, Aureobasidium pullulans, Candida punicea, and species of Cephalosporium. Taxonomic and ecological implications of proteolytic activity are discussed.

¹ Contribution no. 941 from the Institute of Marine Sciences, University of Miami, Miami, Fla.