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. 1985 Dec 1;232(2):431-4.
doi: 10.1042/bj2320431.

N2-(1-carboxyethyl)methionine. A 'pseudo-opine' in octopine-type crown-gall tumours

J L Firmin, I M Stewart, K E Wilson

N2-(1-carboxyethyl)methionine. A 'pseudo-opine' in octopine-type crown-gall tumours

J L Firmin et al. Biochem J. .

Abstract

A novel methionine-containing plasmid-determined compound, N2-(1-carboxyethyl)methionine (NCEM) has been identified in crown-gall tumours induced by octopine-type strains of Agrobacterium tumefaciens. NCEM is probably synthesized by octopine synthase. Cell-free preparations from octopine-type strains of A. tumefaciens can degrade NCEM; however, the bacterium cannot transport the compound into the cell, although these strains can take up and degrade the octopine family of opines.

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