Regulation of secretory transport by protein kinase D-mediated phosphorylation of the ceramide transfer protein.
Regulation of secretory transport by protein kinase D-mediated phosphorylation of the ceramide transfer protein.
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DOI:
10.1083/jcb.200612017
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发表时间:
2007-07-02
期刊:
影响因子:
--
通讯作者:
Olayioye MA
中科院分区:
文献类型:
--
作者:
Fugmann T;Hausser A;Schöffler P;Schmid S;Pfizenmaier K;Olayioye MA
Protein kinase D (PKD) has been identified as a crucial regulator of secretory transport at the trans-Golgi network (TGN). Recruitment and activation of PKD at the TGN is mediated by the lipid diacylglycerol, a pool of which is generated by sphingomyelin synthase from ceramide and phosphatidylcholine. The nonvesicular transfer of ceramide from the endoplasmic reticulum to the Golgi complex is mediated by the lipid transfer protein CERT (ceramide transport). In this study, we identify CERT as a novel in vivo PKD substrate. Phosphorylation on serine 132 by PKD decreases the affinity of CERT toward its lipid target phosphatidylinositol 4-phosphate at Golgi membranes and reduces ceramide transfer activity, identifying PKD as a regulator of lipid homeostasis. We also show that CERT, in turn, is critical for PKD activation and PKD-dependent protein cargo transport to the plasma membrane. Thus, the interdependence of PKD and CERT is key to the maintenance of Golgi membrane integrity and secretory transport.
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影响因子:
21.3
作者:
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通讯作者:
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影响因子:
64.8
作者:
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作者:
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通讯作者:
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DOI:
10.1083/jcb.200412089
发表时间:
2005-04-11
期刊:
The Journal of cell biology
影响因子:
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作者:
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通讯作者:
Malhotra V
影响因子:
4.8
作者:
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通讯作者:
Schiavo, G