N-acetyl-β-d-glucosaminidase activity in Palaemon serratus - Methodological optimisation and intrinsic variability
| Autor: | Romain Coulaud, Aurélie Duflot, Béatrice Rocher, Marc Rollin, Agnes Poret, Benoit Xuereb, Frank Le Foll |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Physiology Apolysis 0211 other engineering and technologies 02 engineering and technology Molting 010501 environmental sciences 01 natural sciences Biochemistry Andrology Acetylglucosaminidase Palaemon Animals Molecular Biology 0105 earth and related environmental sciences 021110 strategic defence & security studies biology biology.organism_classification Palaemon serratus Crustacean Enzyme assay Ecdysis biology.protein Prawn Female Palaemonidae Moulting |
| Zdroj: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 256:110932 |
| ISSN: | 1095-6433 |
| DOI: | 10.1016/j.cbpa.2021.110932 |
| Popis: | Chitinolytic enzymes fulfil a key role in the moulting process of crustaceans, in degrading the endocuticle during apolysis. Measuring the enzyme activity is an interesting manner to monitor the moult process at sub-individual level, complementary to the classical observation of the integument morphogenesis, ecdysis success, or moult cycle duration. The present study aimed to optimise the methodology of using N-acetyl-β-D-glucosaminidase (NAGase) activity to monitor moulting in the marine prawn Palaemon serratus, and to compare NAGase activity levels along the moult cycle of both male and female specimens. First, to optimise protocols for five different organs, different reaction medium compositions were tested, considering the type buffer, concentration of the substrate, and the load in enzymatic extract. Second, levels of NAGase activity were closely monitored during eight moulting stages in male prawns. Variations in NAGase activity were observed during the moult cycle, with an increase in activity in the late premoult phase of approximately 2.4-fold the level of the intermoult phase. This response profile was observed for each tested organ. The levels of NAGase activity of male and female specimens were compared during three stages of the premoult phase. The patterns observed for both sexes were similar for all the tested organs. |
| Databáze: | OpenAIRE |
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