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Tightening the noose: Lasso peptides are a class of stable bacterial peptides with unique characteristics that encourage their application in drug design. Epitope grafting of the integrin binding motif RGD onto the lasso structure of microcin J25 converts the knotted peptide into a nanomolar integrin antagonist (see picture). Engineered lasso peptides can therefore be used for pharmacophore presentation.
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