Reference: Ozimek P, et al. (2006) Hansenula polymorpha and Saccharomyces cerevisiae Pex5p's recognize different, independent peroxisomal targeting signals in alcohol oxidase. FEBS Lett 580(1):46-50

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Abstract


Peroxisomal alcohol oxidase (AO) from Hansenula polymorpha is inactive and partially mislocalized to the cytosol upon synthesis in Saccharomyces cerevisiae. Co-production with H. polymorpha pyruvate carboxylase (HpPyc1p) resulted in AO activation, but did not improve import into peroxisomes. We show that import of AO mediated by S. cerevisiae Pex5p is strictly dependent on the peroxisomal targeting signal 1 (PTS1) of AO and independent of HpPyc1p. In contrast, HpPex5p-mediated sorting of AO into S. cerevisiae peroxisomes is independent of the PTS1, but requires an alternative PTS that is only formed when HpPyc1p is co-produced and most likely involves folding and co-factor binding to AO.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Ozimek P, Kötter P, Veenhuis M, van der Klei IJ
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