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The Journal of Cell Biology
Article
License: CC BY NC SA
Data sources: UnpayWall
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PubMed Central
Other literature type . 2009
Data sources: PubMed Central
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The Journal of Cell Biology
Article . 2009 . Peer-reviewed
Data sources: Crossref
https://dx.doi.org/10.7939/r3d...
Other literature type . 2009
License: CC BY NC ND
Data sources: Datacite
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Myosin-driven peroxisome partitioning inS. cerevisiae

Authors: Knoblach, B.; Mast, F.D.; Weisman, L.S.; Glover, J.N.M.; Logan, M.R.; Eitzen, G.A.; Rachubinski, R.A.; +4 Authors

Myosin-driven peroxisome partitioning inS. cerevisiae

Abstract

In Saccharomyces cerevisiae, the class V myosin motor Myo2p propels the movement of most organelles. We recently identified Inp2p as the peroxisome-specific receptor for Myo2p. In this study, we delineate the region of Myo2p devoted to binding peroxisomes. Using mutants of Myo2p specifically impaired in peroxisome binding, we dissect cell cycle–dependent and peroxisome partitioning–dependent mechanisms of Inp2p regulation. We find that although total Inp2p levels oscillate with the cell cycle, Inp2p levels on individual peroxisomes are controlled by peroxisome inheritance, as Inp2p aberrantly accumulates and decorates all peroxisomes in mother cells when peroxisome partitioning is abolished. We also find that Inp2p is a phosphoprotein whose level of phosphorylation is coupled to the cell cycle irrespective of peroxisome positioning in the cell. Our findings demonstrate that both organelle positioning and cell cycle progression control the levels of organelle-specific receptors for molecular motors to ultimately achieve an equidistribution of compartments between mother and daughter cells.

Keywords

Models, Molecular, Saccharomyces cerevisiae Proteins, Recombinant Fusion Proteins, Saccharomyces cerevisiae/cytology, Myosin Type V, Receptors, Cytoplasmic and Nuclear, Saccharomyces cerevisiae, Two-Hybrid System Techniques, Peroxisomes, Myosin Heavy Chains/metabolism, Point Mutation, Cell cycle/physiology, Research Articles, Molecular Structure, Myosin Heavy Chains, Peroxisomes/metabolism, Cell Cycle, Membrane Proteins, Saccharomyces cerevisiae Proteins/metabolism, Mitochondria, Protein Structure, Tertiary, Vacuoles, Myosin Type V/metabolism, Protein Processing, Post-Translational

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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
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    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 10%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
74
Top 10%
Top 10%
Top 10%
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