RGD Reference Report - Stonin 2 is a major adaptor protein for clathrin-mediated synaptic vesicle retrieval. - Rat Genome Database

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Stonin 2 is a major adaptor protein for clathrin-mediated synaptic vesicle retrieval.

Authors: Willox, Anna K  Royle, Stephen J 
Citation: Willox AK and Royle SJ, Curr Biol. 2012 Aug 7;22(15):1435-9. doi: 10.1016/j.cub.2012.05.048. Epub 2012 Jun 21.
RGD ID: 12050122
Pubmed: PMID:22727701   (View Abstract at PubMed)
PMCID: PMC3414847   (View Article at PubMed Central)
DOI: DOI:10.1016/j.cub.2012.05.048   (Journal Full-text)

At small synapses in the brain, clathrin-mediated endocytosis (CME) is the dominant mode of synaptic vesicle retrieval following weak stimulation [1-4]. Clathrin cannot bind to membranes or cargo directly and instead uses adaptor proteins to do so [5]. Although the involvement of clathrin and dynamin in synaptic vesicle retrieval is clear, it is unknown which adaptor proteins are used to sort the essential components into the vesicle [1, 4, 6]. In nonneuronal cells, CME of the majority of transmembrane receptors is either directly or indirectly via the heterotetrameric AP-2 complex [5]. In neurons, RNAi of the µ2 subunit of AP-2 resulted in only minor inhibition of synaptic vesicle retrieval [7, 8], a result echoed in C. elegans [9]. These results suggest that alternative adaptors may be employed for vesicle retrieval. Here, we tested which adaptors are required for vesicle retrieval at hippocampal synapses using a targeted RNAi screen coupled with optical measurements. Stonin 2 emerged as a major adaptor, whereas AP-2 played only a minor role in endocytosis at the synapse. Moreover, using chemically induced rerouting of stonin 2 to mitochondria it was possible to switch endocytically competent synapses to an impaired state on a timescale of minutes.




Biological Process

  
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Species
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Evidence
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Original Reference(s)
Ston2Ratsynaptic vesicle endocytosis involved_inIDA PMID:22727701SynGO 
Ston2Ratsynaptic vesicle endocytosis involved_inIMP PMID:22727701SynGO 


Genes (Rattus norvegicus)
Ston2  (stonin 2)