What question did this study set out to answer?

To identify the molecular mechanisms by which the Drosophila discs-large protein targets and clusters Shaker potassium channels at glutamatergic synapses in vivo.

January 1, 1997Journal of NeuroscienceOpen Access

Essential Role fordlgin Synaptic Clustering of Shaker K+ChannelsIn Vivo

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Authors

FTFrancisco J. TejedorConsejo Superior de Investigaciones Científicas ABAmr BokhariUniversity of Massachusetts Amherst OROscar RogeroUniversity of Alicante

Discussion

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Implication

Experimental study reveals that discs-large directly mediates synaptic clustering of Shaker potassium channels in Drosophila larvae, indicating a vital role for PDZ scaffolding in synapse structure.

Key Points

To identify the molecular mechanisms by which the Drosophila discs-large protein targets and clusters Shaker potassium channels at glutamatergic synapses in vivo.
Examined the colocalization of discs-large (DLG) and Shaker potassium channels at larval neuromuscular junctions in Drosophila.
Characterized domain interactions and channel clustering mechanisms using yeast two-hybrid binding assays, heterologous cell culture, and specific dlg and Shaker mutant alleles.
DLG PDZ1-2 domains bound directly to the C-terminal tail of Shaker potassium channels, driving channel clustering in heterologous cells.
Synaptic clustering of Shaker channels was abolished in vivo by dlg mutations or deletion of the channel's C-terminal binding motif, showing that distinct DLG domains regulate targeting versus clustering.

Cite This Study

Tejedor et al. (1997) studied this question.

synapsesocial.com/papers/6a1c6cec107ed6dc7cc3ccf1 https://doi.org/10.1523/jneurosci.17-01-00152.1997

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Implication

Experimental study reveals that discs-large directly mediates synaptic clustering of Shaker potassium channels in Drosophila larvae, indicating a vital role for PDZ scaffolding in synapse structure.