Abstract
The entomopathogenic entomophthoraceae (zygomycotina) Erynia rhizospora, Erynia dipterigena, and Erynia neoaphidis and the deuteromycete Aspergillus flavus produced single novel endoproteases (pI ca. 9) with activity against trypsin and chymotrypsin substrates. In contrast, the deuteromycete Paecilomyces farinosus produced a chymotrypsin (pI ca. 10).
Inhibitor studies confirmed that the mixed activities (purified by isoelectric focusing) were derived from single endoproteases. The most potent inhibitor was Chicken ovoinhibitor. Little or no inhibition was observed for P. farinosus endoprotease by any of the chemicals tested.
Although the different fungi possessed a broad spectrum of aminopeptidase activity, 3 species (E. rhizospora, E. dipterigena, and A. flavus) showed a preference for leucine at the N-terminal position and 2 species (E. neoaphidis and P. farinosus) showed maximal activity against arginine. Inhibitor studies confirmed these aminopeptidases as metallo-enzymes.
Similar content being viewed by others
References
Aoyagi T, Kojima F, Hamada M, Takeuchi T. Umezama H. Amastatin, an inhibitor of aminopeptidase A, produced by actinomycetes. J Antibiot 1978; 31: 636–638.
Hurion N, Fromentin H, Keil B. Proteolytic enzymes of Entomophthora coronata characterization of a collagenase. Comp Biochem Physiol 1977; 56B: 259–264.
Male O. Vergleichende Untersuchungen uber das enzymatische Verhalten dermatotroper und Nichtdermatotroper myzeten. Zbl Bakt I Abt Orig 1971; 217: 111–127.
Morihara K, Tsuzki H. Comparison of the specificities of various serine proteinases from microorganisms. Arch Biochem Biophys 1969; 129: 620–634.
Nakadai T, Nasuno S, Iguchi N. Purification and properties of leucine aminopeptidase I from Aspergillus oryzae. Agr Biol Chem 1973; 37: 757–765.
Plumbley RA, Pitt D. Purification and properties of a pectin-methyltranseliminase, a phospholipase and two aminopeptidases produced in culture by Phoma medicaginis var. Pinodella. Physiol Plant Pathol 1979; 14: 313–328.
St. Leger RJ, Charnley AK, Cooper RM. Cuticledegrading enzymes of entomopathogenic fungi: synthesis in culture on cuticle. J Invertebr Pathol 1986; 48: 85–95.
St. Leger RJ, Charnley AK, Cooper RM. Characterization of cuticle-degrading proteases produced by the entomopathogen Metarhizium anisopliae. Arch Biochem Biophys 1987; 253: 221–232.
St. Leger RJ, Cooper RM, Charnley AK. Distribution of chymoelastase and trypsin-like enzymes in five species of entomopathogenic deuteromycetes. Arch Biochem Biophys 1987; 258: 123–131.
St. mLeger RJ, Durrands PK, Charnley AK, Cooper RM. The role of extracellular chymoelastase in the virulence of Metarhizium anisopliae for Manduca sexta. J Invertebr Pathol 1988; 52: 285–293.
Wilding N, Latteur G, Dedryver CA. Evaluation of entomophthorales for aphid control: Laboratory and field data. In: Samson RA, Valk JM, Peters D (eds). Fundamental and Applied aspects of Invertebrate Pathology. Proceedings 4th ICIP, 1986, pp. 159–162.
Wraight SP, Roberts DW. Insect control efforts with fungi. Dev Indust Microbiol 1987; 28: 77–87.
Vitale Lj, Renko M, Lenarcic B, Turk V, Pokorny M. Streptomyces rimosus extracelluar proteases. 3. Isolation and characterization of leucine aminopeptidase. Appl Microbiol Biotechnol 1986; 23: 449–455.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Samuels, R.I., Charnley, A.K. & Leger, R.J.S. The partial characterisation of endoproteases and exoproteases from three species of entomopathogenic entomophthorales and two species of deuteromycetes. Mycopathologia 110, 145–152 (1990). https://doi.org/10.1007/BF00437538
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00437538