Fe2+ inhibition of extracellular protease synthesis in Aeromonas hydrophila.

Pansare, A. C.; Venugopal, V.; Lewis, N. F.

doi:10.1271/bbb1961.49.2451

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1988

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“…Growth and protease production by A. hydrophila were suppressed by EDTA and TPP, while, glucose and Fe+ + affected only secretion of protease (Table 1). The role of Fe++ in the enzyme secretion has already been discussed (Pansare et al, 1985). The effect of TPP on growth and enzyme synthesis appears to be significant.…”

Section: Discussionmentioning

confidence: 97%

Growth and Protease Secretion by Spoilage Bacteria: Influence of Nitrogen Fractions of Proteinaceous Foods on Aeromonas hydrophila

Alur

Nerkar

Venugopal

1988

Journal of Food Science

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Sarcoplasmic protein fraction isolated from fish supported growth and secretion of proteases by Aeromonas hydrophila under aerobic conditions. Removal of nitrogenous material having molecular weight above 10,000 daltons from the sarcoplasmic protein fraction by ultrafiltration caused diminished growth and enzyme secretion by the bacterium. This effect could be reversed by supplementation with fish myosin, casein or bovine serum albumin. Resting cells of the bacterium suspended in membrane-filtered sarcoplasmic protein fraction or phosphate buffer (O.OlM, pH 7.5) secreted protease and aminopeptidase in the presence of proteins such as myosin, casein or BSA. The results suggest that apart from the sarcoplasmic protein fraction, structural proteins of muscle and milk could also influence growth and protease secretion by A. hydrophilu.

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Section: Discussionmentioning

confidence: 97%