Journal
FEBS JOURNAL
Volume 276, Issue 5, Pages 1429-1439Publisher
WILEY
DOI: 10.1111/j.1742-4658.2009.06883.x
Keywords
inheritance; Inp1p; peroxisome; Pex11p; yeast
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We have cloned and characterized the Hansenula polymorpha PEX11 gene. Our morphological data are consistent with previous observations that peroxisome proliferation can be regulated by modulating Pex11p levels. Surprisingly, pex11 cells also showed a defect in peroxisome retention in mother cells during vegetative cell reproduction. Until now, Saccharomyces cerevisiae Inp1p has been the only peroxisomal protein that has been shown to play a role in the organelle retention process. H. polymorpha inp1 cells are also affected in peroxisome retention, like pex11 cells. We show by time-lapse imaging that Inp1-green fluorescent protein localization varies during the cell cycle and that the protein is normally recruited to peroxisomes in pex11 cells. Taken together, our data show that H. polymorpha Pex11p is not only important for peroxisome proliferation but is also required for proper peroxisome segregation during cell division.
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