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Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae

Inheritance of the endoplasmic reticulum (ER) requires Ptc1p, a type 2C protein phosphatase of Saccharomyces cerevisiae. Genetic analysis indicates that Ptc1p is needed to inactivate the cell wall integrity (CWI) MAP kinase, Slt2p. Here we show that under normal growth conditions, Ptc1p inactivates...

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Detalles Bibliográficos
Autores principales: Li, Xia, Du, Yunrui, Siegel, Steven, Ferro-Novick, Susan, Novick, Peter
Formato: Texto
Lenguaje:English
Publicado: The American Society for Cell Biology 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2869382/
https://www.ncbi.nlm.nih.gov/pubmed/20357006
http://dx.doi.org/10.1091/mbc.E09-06-0532
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author Li, Xia
Du, Yunrui
Siegel, Steven
Ferro-Novick, Susan
Novick, Peter
author_facet Li, Xia
Du, Yunrui
Siegel, Steven
Ferro-Novick, Susan
Novick, Peter
author_sort Li, Xia
collection PubMed
description Inheritance of the endoplasmic reticulum (ER) requires Ptc1p, a type 2C protein phosphatase of Saccharomyces cerevisiae. Genetic analysis indicates that Ptc1p is needed to inactivate the cell wall integrity (CWI) MAP kinase, Slt2p. Here we show that under normal growth conditions, Ptc1p inactivates Slt2p just as ER tubules begin to spread from the bud tip along the cortex. In ptc1Δ cells, the propagation of cortical ER from the bud tip to the periphery of the bud is delayed by hyperactivation of Slt2p. The pool of Slt2p that controls ER inheritance requires the CWI pathway scaffold, Spa2p, for its retention at the bud tip, and a mutation within Slt2p that prevents its association with the bud tip blocks its role in ER inheritance. These results imply that Slt2p inhibits a late step in ER inheritance by phosphorylating a target at the tip of daughter cells. The PI4P5-kinase, Mss4p, is an upstream activator of this pool of Slt2p. Ptc1p-dependant inactivation of Slt2p is also needed for mitochondrial inheritance; however, in this case, the relevant pool of Slt2p is not at the bud tip.
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spelling pubmed-28693822010-07-30 Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae Li, Xia Du, Yunrui Siegel, Steven Ferro-Novick, Susan Novick, Peter Mol Biol Cell Articles Inheritance of the endoplasmic reticulum (ER) requires Ptc1p, a type 2C protein phosphatase of Saccharomyces cerevisiae. Genetic analysis indicates that Ptc1p is needed to inactivate the cell wall integrity (CWI) MAP kinase, Slt2p. Here we show that under normal growth conditions, Ptc1p inactivates Slt2p just as ER tubules begin to spread from the bud tip along the cortex. In ptc1Δ cells, the propagation of cortical ER from the bud tip to the periphery of the bud is delayed by hyperactivation of Slt2p. The pool of Slt2p that controls ER inheritance requires the CWI pathway scaffold, Spa2p, for its retention at the bud tip, and a mutation within Slt2p that prevents its association with the bud tip blocks its role in ER inheritance. These results imply that Slt2p inhibits a late step in ER inheritance by phosphorylating a target at the tip of daughter cells. The PI4P5-kinase, Mss4p, is an upstream activator of this pool of Slt2p. Ptc1p-dependant inactivation of Slt2p is also needed for mitochondrial inheritance; however, in this case, the relevant pool of Slt2p is not at the bud tip. The American Society for Cell Biology 2010-05-15 /pmc/articles/PMC2869382/ /pubmed/20357006 http://dx.doi.org/10.1091/mbc.E09-06-0532 Text en © 2010 by The American Society for Cell Biology
spellingShingle Articles
Li, Xia
Du, Yunrui
Siegel, Steven
Ferro-Novick, Susan
Novick, Peter
Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae
title Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae
title_full Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae
title_fullStr Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae
title_full_unstemmed Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae
title_short Activation of the Mitogen-activated Protein Kinase, Slt2p, at Bud Tips Blocks a Late Stage of Endoplasmic Reticulum Inheritance in Saccharomyces cerevisiae
title_sort activation of the mitogen-activated protein kinase, slt2p, at bud tips blocks a late stage of endoplasmic reticulum inheritance in saccharomyces cerevisiae
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2869382/
https://www.ncbi.nlm.nih.gov/pubmed/20357006
http://dx.doi.org/10.1091/mbc.E09-06-0532
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