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ANNEE : 2002

Interaction of the C-terminal region of the rat serotonin transporter with MacMARCKS modulates 5-HT uptake regulation by protein kinase C.

AUTEURS : Jess U, El Far O, Kirsch J, Betz H.

REVUE : Biochem Biophys Tes Commun
N° Pubmed : 12051706
The serotonin transporter (SERT) mediates the re-uptake of released serotonin into presynaptic nerve terminals. Its activity is regulated by different mechanisms including protein kinase C (PKC) triggered internalization. Here, we used yeast 2-hybrid screening and cotransfection into 293 cells to identify a homologue of the myristoylated alanine-rich C kinase substrate (MARCKS), MacMARCKS, as a C-terminally interacting protein of SERT. Upon cotransfection with SERT, MacMARCKS caused a reduction in the maximal rate of [(3)H]serotonin uptake and reduced its down-regulation elicited by activation of PKC. Our data are consistent with MARCKS proteins regulating the plasma membrane dynamics of neurotransmitter transporters.