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Sphingoid base signaling via Pkh kinases is required for endocytosis in yeast

Friant, S. and Lombardi, R. and Schmelzle, T. and Hall, M. N. and Riezman, H.. (2001) Sphingoid base signaling via Pkh kinases is required for endocytosis in yeast. The EMBO Journal, 20 (23). pp. 6783-6792.

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Official URL: http://edoc.unibas.ch/dok/A5258163

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Abstract

In yeast, sphingoid base synthesis is required for the internalization step of endocytosis and organization of the actin cytoskeleton. We show that overexpression of either one of the two kinases Pkh1p or Pkh2p, that are homologous to mammalian 3-phosphoinositide-dependent kinase-1 (PDK1), can specifically suppress the sphingoid base synthesis requirement for endocytosis. Pkh1p and Pkh2p have an overlapping function because only a mutant with impaired function of both kinases is defective for endocytosis. Pkh1/2p kinases are activated in vitro by nanomolar concentrations of sphingoid base. These results suggest that Pkh1/2p kinases are part of a sphingoid base-mediated signaling pathway that is required for the internalization step of endocytosis. The Pkc1p kinase that is phosphorylated by Pkh1/2p kinases and plays a role in endocytosis was identified as one of the downstream effectors of this signaling cascade.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Growth & Development > Biochemistry (Hall)
UniBasel Contributors:Hall, Michael N.
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Nature Publishing Group
ISSN:0261-4189
e-ISSN:1460-2075
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:09 Nov 2017 08:22
Deposited On:22 Mar 2012 13:19

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