Transmission across Electrical Synapses (Homo sapiens)

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51, 432cytosolGJD2 GJD2 PANX2 Connexin 36/Connexin45 Gap JunctionComplexConnexin 36 GapJunction ComplexPANX1 GJA10 K+Pannexin 1/Pannexin2 Gap JunctionComplexConnexin 62 GapJunction ComplexGJC1


Description

Electrical transmission across nerve cells is accomplished when the current generated in the upstream neuron spreads to the downstream neuron through a path of low electrical resistance. In neurons this is accomplished at gap junctions. Electrical synapses are found in neuronal tissue where the activity of neurons must be highly synchronized. The neurons responsible for hormone secretion from the mammalian hypothalamus are a class of highly synchronized electric neurons. Gap junctions connecting the presynaptic cell with the postsynaptic cell allow current generated in the presynaptic cell to flow directly into the postsynaptic cell. Transmission speed is dramatically increased in such a system. The junction itself is composed of two hemichannels, one each on the pre- and postsysnaptic cells. These channels are composed of members of the connexin family of proteins. View original pathway at:Reactome.

Comments

Reactome-Converter 
Pathway is converted from Reactome ID: 112307
Reactome-version 
Reactome version: 66
Reactome Author 
Reactome Author: Joshi-Tope, G

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Ontology Terms

 

Bibliography

  1. Maes M, Decrock E, Cogliati B, Oliveira AG, Marques PE, Dagli ML, Menezes GB, Mennecier G, Leybaert L, Vanhaecke T, Rogiers V, Vinken M.; ''Connexin and pannexin (hemi)channels in the liver.''; PubMed Europe PMC
  2. Söhl G, Nielsen PA, Eiberger J, Willecke K.; ''Expression profiles of the novel human connexin genes hCx30.2, hCx40.1, and hCx62 differ from their putative mouse orthologues.''; PubMed Europe PMC
  3. Belluardo N, Trovato-Salinaro A, Mudò G, Hurd YL, Condorelli DF.; ''Structure, chromosomal localization, and brain expression of human Cx36 gene.''; PubMed Europe PMC
  4. Frank M, Eiberger B, Janssen-Bienhold U, de Sevilla Müller LP, Tjarks A, Kim JS, Maschke S, Dobrowolski R, Sasse P, Weiler R, Fleischmann BK, Willecke K.; ''Neuronal connexin-36 can functionally replace connexin-45 in mouse retina but not in the developing heart.''; PubMed Europe PMC
  5. Bruzzone R, Hormuzdi SG, Barbe MT, Herb A, Monyer H.; ''Pannexins, a family of gap junction proteins expressed in brain.''; PubMed Europe PMC

History

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CompareRevisionActionTimeUserComment
101243view11:13, 1 November 2018ReactomeTeamreactome version 66
100782view20:40, 31 October 2018ReactomeTeamreactome version 65
100324view19:17, 31 October 2018ReactomeTeamreactome version 64
99869view16:00, 31 October 2018ReactomeTeamreactome version 63
99426view14:36, 31 October 2018ReactomeTeamreactome version 62 (2nd attempt)
99108view12:39, 31 October 2018ReactomeTeamreactome version 62
93799view13:37, 16 August 2017ReactomeTeamreactome version 61
93336view11:20, 9 August 2017ReactomeTeamreactome version 61
86423view09:17, 11 July 2016ReactomeTeamreactome version 56
83180view10:17, 18 November 2015ReactomeTeamVersion54
81547view13:05, 21 August 2015ReactomeTeamVersion53
77016view08:31, 17 July 2014ReactomeTeamFixed remaining interactions
76721view12:08, 16 July 2014ReactomeTeamFixed remaining interactions
76047view10:10, 11 June 2014ReactomeTeamRe-fixing comment source
75755view11:25, 10 June 2014ReactomeTeamReactome 48 Update
75105view14:05, 8 May 2014AnweshaFixing comment source for displaying WikiPathways description
74752view08:50, 30 April 2014ReactomeTeamReactome46
72006view12:03, 24 October 2013EgonwLayout clean up.
45065view20:04, 6 October 2011KhanspersOntology Term : 'neuron-to-neuron signaling pathway via the electrical synapse' added !
45064view20:04, 6 October 2011KhanspersOntology Term : 'neuron' added !
42149view22:00, 4 March 2011MaintBotAutomatic update
39960view05:58, 21 January 2011MaintBotNew pathway

External references

DataNodes

View all...
NameTypeDatabase referenceComment
Connexin 36 Gap Junction ComplexComplexR-HSA-375351 (Reactome)
Connexin 36/Connexin

45 Gap Junction

Complex
ComplexR-HSA-375333 (Reactome)
Connexin 62 Gap Junction ComplexComplexR-HSA-375341 (Reactome)
GJA10 ProteinQ969M2 (Uniprot-TrEMBL)
GJC1 ProteinP36383 (Uniprot-TrEMBL)
GJD2 ProteinQ9UKL4 (Uniprot-TrEMBL)
K+MetaboliteCHEBI:29103 (ChEBI)
PANX1 ProteinQ96RD7 (Uniprot-TrEMBL)
PANX2 ProteinQ96RD6 (Uniprot-TrEMBL)
Pannexin 1/Pannexin

2 Gap Junction

Complex
ComplexR-HSA-375332 (Reactome)

Annotated Interactions

View all...
SourceTargetTypeDatabase referenceComment
Connexin 36 Gap Junction Complexmim-catalysisR-HSA-375342 (Reactome)
Connexin 36/Connexin

45 Gap Junction

Complex
mim-catalysisR-HSA-375330 (Reactome)
Connexin 62 Gap Junction Complexmim-catalysisR-HSA-375340 (Reactome)
K+ArrowR-HSA-375330 (Reactome)
K+ArrowR-HSA-375339 (Reactome)
K+ArrowR-HSA-375340 (Reactome)
K+ArrowR-HSA-375342 (Reactome)
K+R-HSA-375330 (Reactome)
K+R-HSA-375339 (Reactome)
K+R-HSA-375340 (Reactome)
K+R-HSA-375342 (Reactome)
Pannexin 1/Pannexin

2 Gap Junction

Complex
mim-catalysisR-HSA-375339 (Reactome)
R-HSA-375330 (Reactome) In this electrical synapse the current generated in the presynaptic cell spreads to the postsynaptic cell through an ion channel composed of two hemi-channels composed of six Connexin 45 proteins on one hemi-channel and six Connexin 36 proteins on the second.
R-HSA-375339 (Reactome) In this electrical synapse the current generated in the presynaptic cell spreads to the postsynaptic cell through an ion channel composed of two hemi-channels composed of six Pannexin 1 proteins on one hemi-channel and six Pannexin 2 proteins on the second.
R-HSA-375340 (Reactome) In this electrical synapse the current generated in the presynaptic cell spreads to the postsynaptic cell through an ion channel composed of two hemi-channels composed of six Connexin 62 proteins each.
R-HSA-375342 (Reactome) In this electrical synapse the current generated in the presynaptic cell spreads to the postsynaptic cell through an ion channel composed of two hemi-channels composed of six Connexin 36 proteins each.
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