Abstract:
:The dopamine transporter is a plasma membrane protein that controls extracellular concentrations of the neurotransmitter dopamine. The physiological importance of the DAT provides the impetus for studies aimed at understanding the molecular mechanisms underlying regulation of the DAT gene. In this study, we identified a DAT-expressing neuroblastoma cell line (SK-N-AS) and employed it to investigate the transcriptional regulation of the human DAT gene. Two GC boxes (located at -130 and -60, respectively, relative to the transcriptional start site) were identified as important cis-acting elements mediating DAT promoter activity in dopaminergic SK-N-AS cells. Utilizing Sp-deficient Drosophila Schneider line (SL-2) cells, we showed that both Sp1 and Sp3 are strong activators of DAT transcriptional activity. Differential binding of Sp1 and Sp3 to the two GC boxes was demonstrated by electrophoretic mobility shift assays and super-shift assays. Our results indicate that the Sp1 family of proteins plays an important role in controlling the expression of the dopamine transporter gene within dopaminergic neurons.
journal_name
J Neurochemjournal_title
Journal of neurochemistryauthors
Wang J,Bannon MJdoi
10.1111/j.1471-4159.2005.03051.xkeywords:
subject
Has Abstractpub_date
2005-04-01 00:00:00pages
474-82issue
2eissn
0022-3042issn
1471-4159pii
JNC3051journal_volume
93pub_type
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