期刊
TRENDS IN PLANT SCIENCE
卷 11, 期 2, 页码 65-70出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2005.12.005
关键词
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Polygalacturonase-inhibiting proteins (PGIPs) are extracellular leucine-rich repeat (LRR) proteins that recognize and inhibit fungal polygalacturonases (PGs). The PG-PGIP interaction favours the accumulation of elicitor-active oligogalacturonides and causes the activation of defence responses. Small gene families encode PGIP isoforms that differ in affinity and specificity for PGs secreted by different pathogens. The consensus motif within the LRR structure of PGIPs is the same as that of the extracellular receptors of the plant innate immune system. Structural and functional evidence suggest that PGIPs are versatile proteins involved in innate immunity and that they are capable of recognizing different surface motifs of functionally related but structurally variable PGs.
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