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Published on: April 20, 2015
SEC14-like protein 1 interacts with cholinergic transporters
Fabíola M Ribeiro1, Lucimar T Ferreira, Sebastian Marion
1Departamento de Bioquímica-Imunologia, Brazil.
Researchers discovered SEC14L1 interacts with the vesicular acetylcholine transporter (VAChT) and high-affinity choline transporter (CHT1). This interaction impacts acetylcholine transport and storage, suggesting a role for GOLD domain proteins in cholinergic transporter function.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Vesicular acetylcholine transporter (VAChT) trafficking regulates acetylcholine storage and release.
- SEC14L1 is a mammalian SEC14-like protein potentially involved in phospholipid transfer.
Purpose of the Study:
- To identify proteins interacting with VAChT using yeast-two hybrid screening.
- To investigate the functional consequences of SEC14L1 interaction with cholinergic transporters.
Main Methods:
- Yeast-two hybrid screening using VAChT C-terminal tail.
- Co-immunoprecipitation assays in mammalian cells.
- Cellular localization studies and functional assays of choline transport.
Main Results:
- SEC14L1 interacts with VAChT via its GOLD domain, confirmed in mammalian cells.
- SEC14L1 co-immunoprecipitates with the high-affinity choline transporter (CHT1).
- SEC14L1 is recruited to intracellular organelles upon co-expression with VAChT or CHT1, and its overexpression reduces choline transport activity.
Conclusions:
- SEC14L1 interacts with key cholinergic transporters, VAChT and CHT1.
- The interaction influences cholinergic transporter localization and function.
- Proteins with GOLD domains may play a significant role in regulating cholinergic transporter activity.
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