PROTEIN HYDROLYSIS IN GRASSHOPPER CUTICLES BY ENTOMOPATHOGENIC FUNGAL EXTRACELLULAR PROTEASES

被引:22
作者
BIDOCHKA, MJ [1 ]
KHACHATOURIANS, GG [1 ]
机构
[1] UNIV SASKATCHEWAN, DEPT APPL MICROBIOL & FOOD SCI, BIOINSECTICIDE RES LAB, SASKATOON S7N 0W0, SK, CANADA
关键词
D O I
10.1006/jipa.1994.1002
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Several regions of unsclerotized (teneral) cuticle from the migratory grasshopper, Melanoplus sanguinipes, were treated with extracellular protease-containing culture supernatants of the entomopathogenic fungi, Beauveria bassiana or Metarhizium anisopliae, or purified extracellular B. bassiana protease. Treatment of the various cuticles with the culture supernatants resulted in a 41.1% (forewing) to 83.0% (hindwing) loss in cuticle dry weight. Addition of phenylmethylsulfonyl fluoride (PMSF), a protease inhibitor, to the culture supernatants, resulted in a substantial retention of cuticle dry weight after the treatment. The urea-soluble proteins from untreated cuticles or cuticles treated with B. bassiana or M. anisopliae culture supernatants or purified B. bassiana protease were characterized by two-dimensional (2D) gel electrophoresis. An initial reduction in the number of acidic proteins was observed in the 2D gels from cuticles previously treated with fungal culture supernatants or purified B. bassiana protease. High-molecular-weight (>31 kDa) basic cuticular proteins were also susceptible to degradation by proteases. Addition of PMSF to the B. bassiana or M. anisopliae supernatants previous to incubation with the cuticle resulted in only minor qualitative changes in cuticular protein 2D patterns. The action of B. bassiana or M. anisopliae proteases toward acidic cuticular proteins, and to a lesser extent the high-molecular basic proteins, is discussed in light of what is known of the biochemistry of entomopathogenic fungal proteases. © 1994 Academic Press, Inc.
引用
收藏
页码:7 / 13
页数:7
相关论文
共 23 条
[1]   CHARACTERIZATION OF CUTICULAR PROTEINS FROM THE MIGRATORY LOCUST, LOCUSTA-MIGRATORIA [J].
ANDERSEN, SO ;
HOJRUP, P ;
ROEPSTORFF, P .
INSECT BIOCHEMISTRY, 1986, 16 (03) :441-447
[2]  
Andersen S.O., 1980, P185
[3]  
Bidochka M.J., 1989, THESIS U SASKATCHEWA
[4]   THE IMPLICATION OF METABOLIC ACIDS PRODUCED BY BEAUVERIA-BASSIANA IN PATHOGENESIS OF THE MIGRATORY GRASSHOPPER, MELANOPLUS-SANGUINIPES [J].
BIDOCHKA, MJ ;
KHACHATOURIANS, GG .
JOURNAL OF INVERTEBRATE PATHOLOGY, 1991, 58 (01) :106-117
[5]   N-ACETYL-D-GLUCOSAMINE-MEDIATED REGULATION OF EXTRACELLULAR PROTEASE IN THE ENTOMOPATHOGENIC FUNGUS BEAUVERIA-BASSIANA [J].
BIDOCHKA, MJ ;
KHACHATOURIANS, GG .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1988, 54 (11) :2699-2704
[6]   PURIFICATION AND PROPERTIES OF AN EXTRACELLULAR PROTEASE PRODUCED BY THE ENTOMOPATHOGENIC FUNGUS BEAUVERIA-BASSIANA [J].
BIDOCHKA, MJ ;
KHACHATOURIANS, GG .
APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 1987, 53 (07) :1679-1684
[7]   IDENTIFICATION OF BEAUVERIA-BASSIANA EXTRACELLULAR PROTEASE AS A VIRULENCE FACTOR IN PATHOGENICITY TOWARD THE MIGRATORY GRASSHOPPER, MELANOPLUS-SANGUINIPES [J].
BIDOCHKA, MJ ;
KHACHATOURIANS, GG .
JOURNAL OF INVERTEBRATE PATHOLOGY, 1990, 56 (03) :362-370
[8]   GROWTH OF THE ENTOMOPATHOGENIC FUNGUS BEAUVERIA-BASSIANA ON CUTICULAR COMPONENTS FROM THE MIGRATORY GRASSHOPPER, MELANOPLUS-SANGUINIPES [J].
BIDOCHKA, MJ ;
KHACHATOURIANS, GG .
JOURNAL OF INVERTEBRATE PATHOLOGY, 1992, 59 (02) :165-173
[9]  
BRADFORD MM, 1976, ANAL BIOCHEM, V72, P248, DOI 10.1016/0003-2697(76)90527-3
[10]   ANALYSIS OF THE CUTICULAR PROTEINS OF HYALOPHORA-CECROPIA WITH 2-DIMENSIONAL ELECTROPHORESIS [J].
COX, DL ;
WILLIS, JH .
INSECT BIOCHEMISTRY, 1987, 17 (03) :457-+