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Polygalacturonase-inhibiting protein (PGIP) in plant defence: a structural view
Adele Di Matteo1, Daniele Bonivento, Demetrius Tsernoglou
1Dipartimento di Biologia Vegetale, Universita' di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185 Roma, Italy.
Abstract:
Polygalacturonase-inhibiting proteins are plant extracellular leucine-rich repeat proteins that specifically bind and inhibit fungal polygalacturonases. The interaction with PGIP limits the destructive potential of polygalacturonases and might trigger the plant defence responses induced by oligogalacturonides. A high degree of polymorphism is found both in PGs and PGIPs, accounting for the specificity of different plant inhibitors for PGs from different fungi. Here, we review the structural features and our current understanding of the PG-PGIP interaction.
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