Cooperative metal-coordination and ion pairing in tripeptide recognition

Organic Letters
Aaron T Wright, Eric V Anslyn


[structure: see text] The recognition of tripeptides by a metal-centered receptor consisting of a rigid backbone region and variable tripeptide arms is described. The studies showed that the receptor was selective for l-Xxx-l-Lys-l-Lys, with Xxx = His, Cys, and Met, giving association constants near 1.0 x 10(6) M(-)(1). Binding enhancement through cooperative interactions of the peptidic arms is demonstrated.


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