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Heterogeneity of extracellular proteases produced by different isolates of Aeromonas hydrophila and A. sobria pathogenic for fish
Author(s) -
NIETO T. P.,
ELLIS A. E.
Publication year - 1991
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/j.1365-2761.1991.tb00592.x
Subject(s) - proteases , aeromonas hydrophila , elastase , microbiology and biotechnology , biology , extracellular , aeromonas , fish <actinopterygii> , pancreatic elastase , enzyme , bacteria , biochemistry , fishery , genetics
. Ten isolates of Aeromonas hydrophila and two of A. sobria were investigated with regard to elastase and caseinase production, and the pI, heat and EDTA sensitivity of extracellular caseinase enzymes. An extreme degree of heterogeneity amongst the strains was observed. In isoelectricfocusing, the ECP of the various strains possessed between 19 and 31 proteins, and the number of extracellular proteases ranged from one to 12. Similarities between strains using one criterion of comparison (e.g. IEF patterns) did not hold true by other criteria (e.g. heat or EDTA sensitivity of proteases).