Butyrolactone I

Butyrolactone I

CAT N°: 21765
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Butyrolactone I is a secondary metabolite from A. terreus that acts as an ATP-competitive inhibitor of cyclin-dependent kinase 1 (Cdk1; IC50 = 20 ?g/ml in PC-14 cells).{36048} It induces dose-dependent G2/M arrest, inhibits DNA synthesis, and decreases Cdk1 protein expression in vitro.{36048} Butyrolactone I has antitumor effects in non-small cell lung, small cell lung, and prostate cancer cell lines (mean IC50 = 50 ?g/ml).{36048,36049} It inhibits in vitro Cdk1 phosphorylation of tau and in vivo phosphorylation of transcription factor E2F-1.{36050,36051} Additionally, exogenous application of butyrolactone I to A. terreus cultures increases biogenesis of the secondary metabolites lovastatin (Item No. 10010338) and conidiation in a quorum-sensing manner.{36052}

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