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FEBS Lett. 2006 Dec 22;580(30):6880-4. Epub 2006 Nov 29.

YCA1 participates in the acetic acid induced yeast programmed cell death also in a manner unrelated to its caspase-like activity.

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CNR, Istituto di Biomembrane e Bioenergetica, I-70126 Bari, Italy.


Yeast cells lacking the metacaspase-encoding gene YCA1 (Deltayca1) were compared with wild-type (WT) cells with respect to the occurrence, nature and time course of acetic-acid triggered death. We show that Deltayca1 cells undergo programmed cell death (PCD) with a rate lower than that of the WT and that PCD in WT cells is caused at least in part by the caspase activity of Yca1p. Since in Deltayca1 cells this effect is lost, but z-VAD-fmk does not prevent both WT and Deltayca1 cell death, PCD in WT cells occurs via a Yca1p caspase and a non-caspase route with similar characteristics.

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