PMID: 5183Apr 1, 1976Paper

The subcellular distribution and properties of Crithidia sp. hydrolases with particular reference to pyrophosphate and orthophosphate monoester phosphohydrolases

Canadian Journal of Biochemistry
J McLaughlinE Meerovitch

Abstract

A cell fractionation scheme was developed for studying the distribution of certain hydrolases, especially phosphohydrolases in a Crithidia sp. (Trypanosomatidae). Whilst between 26-56% of the total cellular hydrolase activities were soluble (probably of flagellar pocket origin), a certain percentage, 5-40%, was sedimentable. A particulate fraction obtained after isopycnic density gradient centrifugation (p = 1.187-1.241), designated fraction FA/FB, was enriched in various acid hydrolases (relative specific activities 1.33-6.24) and displayed latent phosphohydrolase activities. The density gradient distributions of this hydrolytic enzymes were compared with reference to one another and malate dehydrogenase (mitochondrial marker). From the results obtained it appears that the sedimentable acid hydrolases of Crithidia are associated with a heterogeneous population of subcellular particles. Cytochemical observations on the FA/FB fraction supported this finding and revealed the association of acid phosphatase reaction product with subcellular elements resembling multivesicular bodies.

Citations

Jan 1, 1990·Parasitology Research·S ManentiA G Hernández
Sep 1, 1986·Molecular and Biochemical Parasitology·J K LovelaceM Gottlieb
Jan 2, 1987·Molecular and Biochemical Parasitology·J K Lovelace, M Gottlieb
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Feb 15, 2003·FEMS Microbiology Reviews·Neelam A Desai, Vepatu Shankar
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