Transmembrane topology of ceramide synthase in yeast

Transmembrane topology of ceramide synthase in yeast.

Ceramide plays a crucial role as a basic building block of sphingolipids, but also as a signalling molecule mediating cell-fate decisions. Three genes, LAG1, LAC1 and LIP1, have been shown to be required for ceramide synthase activity in Saccharomyces cerevisiae [Guillas, Kirchman, Chuard, Pfefferli, Jiang, Jazwinski and Conzelman (2001) EMBO J. 20, 2655-2665; Schorling, Vallee, Barz, Reizman a...

Overexpression of Ceramide Synthase in Arabidopsis 1 Running Head: Overexpression of Ceramide Synthase in Arabidopsis

Transmembrane Topology Pattern and Detection of Transmembrane Protein Functions

Transmembrane (TM) proteins (TMPs) have important roles in the biological organisms [1, 2]. With the rapid increasing of the number of TMPs, a lot of efforts are made in attempt to classify TMP functions by sequence analysis, and in fact, some databases aimed for it have been constructed (e.g., Pfam [3]). Which characteristics of TMP could provide us important clues to its function? We suppose ...

Specificity of Transmembrane Protein Palmitoylation in Yeast

Many proteins are modified after their synthesis, by the addition of a lipid molecule to one or more cysteine residues, through a thioester bond. This modification is called S-acylation, and more commonly palmitoylation. This reaction is carried out by a family of enzymes, called palmitoyltransferases (PATs), characterized by the presence of a conserved 50- aminoacids domain called "Asp-His-His...

Overexpression of ceramide synthase 1 increases C18-ceramide and leads to lethal autophagy in human glioma

Ceramide synthase 1 (CERS1) is the most highly expressed CERS in the central nervous system, and ceramide with an 18-carbon-containing fatty acid chain (C18-ceramide) in the brain plays important roles in signaling and sphingolipid development. However, the roles of CERS1 and C18-ceramide in glioma are largely unknown. In the present study, measured by electrospray ionization linear ion trap ma...