Unexpected side chain effects at residue 8 of cyclosporin a derivatives allow photoswitching of immunosuppression.


To dissect the enzyme inhibitory properties of the immunosuppressive cyclic undecapeptide cyclosporin A (CsA) and gain access to monospecific, non-calcineurin-inhibiting CsA derivatives, [D-Ser8]CsA was subjected to modifications at the D-Ser side chain. Thus, we modified a CsA residue flanking the calcineurin (CaN) and cyclophilin 18 (Cyp18) binding… (More)


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