Annotated protein:Complexin-1 (921-S) (Complexin I) (CPX I) (Synaphin-2). Gene symbol: CPLX1. Taxonomy: Mus musculus (Mouse). Uniprot ID: P63040
antibody wiki:
SynGO gene info:SynGO data @ CPLX1
Ontology domain:Biological Process
SynGO term:regulation of synaptic vesicle fusion to presynaptic active zone membrane (GO:0031630)
Synapse type(s):hippocampus, glutamatergic
Annotated paper:Reim K, et al. "Complexins regulate a late step in Ca2+-dependent neurotransmitter release" Cell. 2001 Jan 12;104(1):71-81 PMID:11163241
Figure(s):Fig. 2, Table 1, Fig.5
Annotation description:Single, autaptic hippocampal Complexin-1 and -2 double knock-out (DKO) neurons exhibit a decrease in evoked release (EPSC amplitude; Fig. 2A, B; Table 1), but not in the readily-relasable pool size (sucrose response; Fig 2D, E; Table 1).

Complexin-1 and -2 can compensate for the loss of the respective other isoform in hippocampal autaptic neurons: Complexin-1 KO mice and Complexin-2 KO mice are viable and exhibit no deficits in evoked release (Fig 2B), whereas Complexin-1/2 DKO mice die a few hours after birth.

Complexin only regulates synaptic vesicle fusion, since the deficit in synaptic transmission can be rescued by elevating the extracellular calcium concentration (Fig. 5).
Evidence tracking, Biological System:Cultured neurons
Evidence tracking, Protein Targeting:Genetic transformation (eg; knockout, knockin, mutations)
Evidence tracking, Experiment Assay:Whole-cell patch clamp
Annotator(s):Noa Lipstein (ORCID:0000-0002-0755-5899)
Cordelia Imig (ORCID:0000-0001-7351-8706)
Vincent O'connor (ORCID:0000-0003-3185-5709)
Nils Brose (ORCID:0000-0003-0938-8534)
Lab:Department of Molecular Neurobiology, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
SynGO annotation ID:575
Dataset release (version):20231201
View annotation as GO-CAM model:Gene Ontology