Leucine Aminopeptidase (Aminopeptidase-I) N-Acetyl-Beta-Hexosaminidase And Lysosomes In The Mussel Mytilus-Edulis-L In Response To Salinity Changes

Moore, MN; Koehn, RK; Bayne, BL. 1980 Leucine Aminopeptidase (Aminopeptidase-I) N-Acetyl-Beta-Hexosaminidase And Lysosomes In The Mussel Mytilus-Edulis-L In Response To Salinity Changes. Journal of Experimental Zoology, 214 (3). 239 - 249. 10.1002/jez.1402140302

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Official URL: http://dx.doi.org/10.1002/jez.1402140302

Abstract/Summary

The intracellular distribution of aminopeptidase-I in the intestinal and digestive cells of Mytilus edulishas been shown to be the same as the lysosomal marker enzymes β-glucuronidase and N-acetyl-β-hexosaminidase. Activity for these enzymes was also associated with the intestinal apical cytoplasm and microvillous border where there was pronounced staining for aminopeptidase-I. Experimental alterations of salinity induced changes in both microdensitometrically and spectrophotometrically determined aminopeptidase-I activity, as an increase with raised salinity and a decrease with lowered salinity. Lysosomal hexosaminidase showed similar changes in activity with altered salinity. Cytochemically determined lysosomal stability was also responsive to salinity changes, indicative of alterations in lysosomal functional capability. The lysosomal distribution of aminopeptidase-I is discussed in terms of the function of lysosomes in intracellular protein turnover, their high concentrations of free amino acids, and the possible roles which these might play in intracellular osmoregulation in response to salinity change.

Item Type: Publication - Article
Subjects: Ecology and Environment
Marine Sciences
Divisions: Plymouth Marine Laboratory > Other (PML)
Depositing User: EPServices Admin
Date made live: 11 Feb 2014 15:54
Last Modified: 06 Jun 2017 16:03
URI: http://plymsea.ac.uk/id/eprint/2788

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