leucine aminopeptidase

Bestatin (Ubenimex) competitively inhibits many aminopeptidases, including B, N and leucine aminopeptidases. Ubenimex is a microbial metabolite and dipeptide with potential immunomodulatory and antitumor activities. Aminopeptidases has been implicated in the process of cell adhesion and invasion of tumor cells. Therefore, inhibiting aminopeptidases may partially attribute to the antitumor effect of ubenimex. This agent also activates T lymphocyte, macrophage, and bone marrow stem cell as well as stimulates the release of interleukin-1 and -2, thus further enhances its antitumor activity.

Enocyanin, an anthocyanin extracted from grapes, exhibits inhibitory effects on leucine aminopeptidase, acid phosphatase, γ-glutamyl transpeptidase, and esterase activity.

Actinonin ((-)-Actinonin) is a naturally occurring antibacterial agent produced by Actinomyces and a potent reversible peptide deformylase (PDF) inhibitor with a Ki of 0.28 nM. It also induces apoptosis and inhibits aminopeptidase M, aminopeptidase N, and leucine aminopeptidase, as well as MMP-1, MMP-3, MMP-8, MMP-9, and meprin α with Ki values of 300 nM, 1,700 nM, 190 nM, 330 nM, and 20 nM, respectively. Actinonin exhibits antiproliferative and antitumor activities [1][2][3][4][5].