Journal
TRENDS IN CELL BIOLOGY
Volume 15, Issue 3, Pages 124-127Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tcb.2005.01.001
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The molecular identity of the key executioners involved in controlling plant programmed cell death (PCD) has been elusive. In a recent paper published in Science, Hatsugai and coworkers reported that a well-characterized protease called VPE from the plant cell vacuole can cleave caspase-specific substrates and is required for cell death activation by tobacco mosaic virus. This work provides clear evidence for the importance of the vacuole in plant PCD and a novel regulatory function for this organelle as well as for VPE proteases.
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