The invention concerns the field of protein production and cell culture technology. CERT is identified as a novel in vivo PKD substrate. Phosphorylation on serine 132 by PKD decreases the affinity of CERT towards its lipid target phosphatidylinositol 4-phosphate at Golgi membranes and reduces ceramide transfer activity, identifying PKD as a regulator of lipid homeostasis. The present invention shows that CERT in turn is critical for PKD activation and PKD dependent protein cargo transport to the plasma membrane. The interdependence of PKD and CERT is thus a key to the maintenance of Golgi membrane integrity and secretory transport.
申请公布号
HRP20121077(T1)
申请公布日期
2013.01.31
申请号
HR2012P001077T
申请日期
2012.12.28
申请人
BOEHRINGER INGELHEIM PHARMA GMBH & CO.KG.
发明人
KAUFMANN, HITTO;FLORIN, LORE;BECKER, ERIC;OLAYIOYE, MONILOLA;HAUSSER, ANGELIKA;FUGMANN, TIM