The world's first wiki where authorship really matters (Nature Genetics, 2008). Due credit and reputation for authors. Imagine a global collaborative knowledge base for original thoughts. Search thousands of articles and collaborate with scientists around the globe.

wikigene or wiki gene protein drug chemical gene disease author authorship tracking collaborative publishing evolutionary knowledge reputation system wiki2.0 global collaboration genes proteins drugs chemicals diseases compound
Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Characterization of phosphatidylserine transport to the locus of phosphatidylserine decarboxylase 2 in permeabilized yeast.

In yeast, nascent phosphatidylserine (PtdSer) can be transported to the mitochondria and Golgi/vacuole for decarboxylation to synthesize phosphatidylethanolamine (PtdEtn). In strains with a psd1Delta allele for the mitochondrial PtdSer decarboxylase, the conversion of nascent PtdSer to PtdEtn can serve as an indicator of lipid transport to the locus of PtdSer decarboxylase 2 (Psd2p) in the Golgi/vacuole. We have followed the metabolism of [(3)H]serine into PtdSer and PtdEtn to study lipid transport in permeabilized psd1Delta yeast. The permeabilized cells synthesize (3)H-PtdSer and, after a 20-min lag, decarboxylate it to form [(3)H]PtdEtn. Formation of [(3)H]PtdEtn is linear between 20 and 100 min of incubation and does not require ongoing PtdSer synthesis. PtdSer transport can be resolved into a two-component system using washed, permeabilized psd1Delta cells as donors and membranes isolated by ultracentrifugation as acceptors. With this system, the transport-dependent decarboxylation of nascent PtdSer is dependent upon the concentration of acceptor membranes, requires Mn(2+) but not nucleotides, and is inhibited by EDTA. High speed membranes isolated from a previously identified PtdSer transport mutant, pstB2, contain normal Psd2p activity but fail to reconstitute PtdSer transport and decarboxylation. Reconstitution with permutations of wild type and pstB2Delta donors and acceptors identifies the site of the mutant defect as the acceptor side of the transport reaction.[1]


WikiGenes - Universities