Structure-based optimization of a peptidyl inhibitor against calcineurin-nuclear factor of activated T cell (NFAT) interaction.

ABSTRACT: Calcineurin inhibitors such as cyclosporine A and FK506 are effective immunosuppressants but produce severe side effects. Rational modification of a previously reported peptide inhibitor, GPHPVIVITGPHEE (KD ∼ 500 nM), by replacing the two valine residues with tert-leucine and the C-terminal proline with a cis-proline analogue, gave an improved inhibitor ZIZIT-cisPro, which binds to calcineurin with a KD value of 2.6 nM and is more resistant to proteolysis.

SUBMITTER: Qian Z 

PROVIDER: S-EPMC4174996 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature