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Enzymes of Ornithine‐Arginine Metabolism in Trypanosomatids of the Genus Phytomonas 1
Author(s) -
Camargo E. Plessmann,
Silva Solange,
Roitman Isaac,
Souza Wanderley,
Jankevicius J. Vitor,
Dollet Michel
Publication year - 1987
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1987.tb03209.x
Subject(s) - arginase , biology , ornithine carbamoyltransferase , enzyme , biochemistry , ornithine , arginine , amino acid
Trypanosomatids recently isolated from the plants Euphorbia pinea, E. characias, E. hyssopifolia, Manihoi esculenta (cassava) and Lycopersicon sp. (tomato) plus the McGhee‐Postell isolate of Phytomonas davidi have been examined for the presence of enzymes of ornithine‐arginine metabolism. Arginase (EC 3.5.3.1) was not detected in the flagellates examined whereas arginine deiminase (EC 3.5.3.6) and citrullinehydrolase (EC 3.5.1.20) were present in all organisms. Phytomonas davidi and the isolate from E. hyssopifolia , besides these enzymes, also had ornithine carbamoyltransferase (EC 2.1.3.3). The enzymic constitution of these flagellates is compared from a taxonomic standpoint to that of previously studied trypanosomatids.