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FEBS Lett. 2002 Jul 3;522(1-3):109-12.

A polygalacturonase of animal origin isolated from the root-knot nematode Meloidogyne incognita.

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  • 1INRA, Unité Interactions Plantes-Microorganismes et Santé Végétale, 123 Boulevard Francis Meilland, 60606 Antibes, France.


The first animal polygalacturonase (PG, EC 2.1.15) encoding cDNA, Mi-pg-1, was cloned from the plant parasitic nematode Meloidogyne incognita. The enzymatic activity of MI-PG-1 was confirmed after heterologous expression in Escherichia coli. The presence of a predicted signal peptide on the MI-PG-1 sequence together with the specific localization of the transcripts of the Mi-pg-1 gene in the oesophageal glands of infective juveniles imply that MI-PG-1 could be secreted into plant tissues. The potential role of MI-PG-1 in parasitism is discussed.

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