Inactivation effect and kinetics of cathepsin L from white shrimp (Litopenaeus vannamei) by dense phase carbon dioxide

Inactivation effect and kinetics of cathepsin L from white shrimp (Litopenaeus vannamei) by dense phase carbon dioxide

The effects of dense phase carbon dioxide (DPCD) pressure and temperature on the activity of cathepsin L in white shrimp (Litopenaeus vannamei) were studied. Meanwhile the effects of DPCD and heat treatment on the activity of cathepsin L were compared. The results of inactivation kinetics showed tha...

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Bibliographic Details
Main Authors: Ouyang Zheng, Xiaojie Cao, Yanqing Teng, Qinxiu Sun, Shucheng Liu
Format: Article
Language:English
Published: Elsevier 2024-01-01
Series:Current Research in Food Science
Subjects:
Cathepsin L
Dense phase carbon dioxide
White shrimp
Pressure
Temperature
Online Access:http://www.sciencedirect.com/science/article/pii/S2665927124001990
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Summary:The effects of dense phase carbon dioxide (DPCD) pressure and temperature on the activity of cathepsin L in white shrimp (Litopenaeus vannamei) were studied. Meanwhile the effects of DPCD and heat treatment on the activity of cathepsin L were compared. The results of inactivation kinetics showed that under the same treatment temperature, the inactivation effect of DPCD on cathepsin L increased gradually with the increase of pressure and time. The effect of DPCD pressure on the activity of cathepsin L accorded with the first-order kinetic model. Under the same treatment pressure, with the increase of temperature, the inactivation effect of cathepsin L was significant at the initial stage of DPCD treatment (rapid inactivation period), and decreased with the extension of time (stable inactivation period). The effect of DPCD treatment temperature on cathepsin L activity accorded with the first-order kinetic model at 35 °C, and two-stage kinetic model at 40–60 °C. The difference of relative enzyme activity between the two treatments showed that the dependence of DPCD on temperature was greater than that of heat. Ea, F and Ea, S of DPCD were higher than that of heat, which indicated that cathepsin L was more easily inactivated under DPCD treatment.
ISSN:2665-9271

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