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- W1997069891 abstract "A mammalian vesicular neurotransmitter transporter has been expressed in the yeast Saccharomyces cerevisiae. The gene encoding the rat vesicular monoamine transporter (rVMAT(1)) was cloned in several expression plasmids. The transporter was expressed at detectable levels only when short sequences using codons favored by S. cerevisiae were fused preceding the start of translation of rVMAT(1). The scarce expression of the wild-type protein was, most likely, due to the fact that part of the N-terminus of the protein is encoded by codons not preferred in S. cerevisiae. Furthermore, low growth temperatures increased rVMAT(1) expression and altered its processing. Whereas at 30 degrees C the protein is not glycosylated, at lower temperatures ( approximately 16 degrees C) half of the expressed transporters undergo core glycosylation. In addition, under these conditions the levels of protein expression significantly increase. Using a functional chimeric protein composed by VMAT and the green fluorescent protein (GFP), it is shown that the punctate pattern of intracellular distribution remains invariable at the different temperatures. Using a similar fusion sequence, the bovine VMAT isoform 2 (bVMAT(2)) was also expressed in yeast. The yeast-expressed bVMAT(2) binds [(3)H]dihydrotetrabenazine ([(3)H]TBZOH) with the same characteristics found in the native protein from bovine chromaffin granules. Dodecyl maltoside-solubilized bVMAT(2) retains the conformation required for [(3)H]TBZOH binding. We exploited the robust binding to follow the transporter during purification assays on a Ni(2+)-chelating column. In this report we describe for the first time the heterologous expression of a neurotransmitter transporter in the yeast S. cerevisiae." @default.
- W1997069891 created "2016-06-24" @default.
- W1997069891 creator A5029719312 @default.
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- W1997069891 date "2001-02-01" @default.
- W1997069891 modified "2023-10-14" @default.
- W1997069891 title "Vesicular monoamine transporters heterologously expressed in the yeast Saccharomyces cerevisiae display high-affinity tetrabenazine binding" @default.
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- W1997069891 doi "https://doi.org/10.1016/s0005-2736(00)00374-6" @default.
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