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Serine-Endopeptidase specificity to twin-arginine pairs in lupin seed may be associated with germination

Magni et al. 2012 describe a novel serine-endopeptidase activity with cleavage specificity to twin-arginine pairs (-R-R-) in mature dry Lupinus albus seeds. The authors suggest that the activity of the novel endopeptidase is essential for degradation at germination and generates polypeptide fragments with specific biological activity. [1]

[1] Magni C, Sessa F, Tedeschi G, Negri A, Scarafoni A, Consonni A, Duranti M: Identification in Lupin Seed of a Serine-Endopeptidase Activity Cleaving between Twin Arginine Pairs and Causing Limited Proteolysis of Seed Storage Proteins. Mol Plant. 2012 Jan 4.
http://www.ncbi.nlm.nih.gov/pubmed/22217442