Entry
Name
Long-term potentiation - Ictidomys tridecemlineatus (thirteen-lined ground squirrel)
Description
Hippocampal long-term potentiation (LTP), a long-lasting increase in synaptic efficacy, is the molecular basis for learning and memory. Tetanic stimulation of afferents in the CA1 region of the hippocampus induces glutamate release and activation of glutamate receptors in dendritic spines. A large increase in [Ca2+]i resulting from influx through NMDA receptors leads to constitutive activation of CaM kinase II (CaM KII) . Constitutively active CaM kinase II phosphorylates AMPA receptors, resulting in potentiation of the ionic conductance of AMPA receptors. Early-phase LTP (E-LTP) expression is due, in part, to this phosphorylation of the AMPA receptor. It is hypothesized that postsynaptic Ca2+ increases generated through NMDA receptors activate several signal transduction pathways including the Erk/MAP kinase and cAMP regulatory pathways. The convergence of these pathways at the level of the CREB/CRE transcriptional pathway may increase expression of a family of genes required for late-phase LTP (L-LTP).
Class
Organismal Systems; Nervous system
BRITE hierarchy
Pathway map
Other DBs
Organism
Ictidomys tridecemlineatus (thirteen-lined ground squirrel) [GN:
iti ]
Gene
101954421 Plcb1; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-1 isoform X1 [KO:K05858 ] [EC:3.1.4.11 ]
101954934 Grin2b; glutamate receptor ionotropic, NMDA 2B isoform X1 [KO:K05210 ]
101958232 Plcb2; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-2 isoform X1 [KO:K05858 ] [EC:3.1.4.11 ]
101958827 Camk2b; calcium/calmodulin-dependent protein kinase type II subunit beta isoform X1 [KO:K04515 ] [EC:2.7.11.17 ]
101960408 Cacna1c; voltage-dependent L-type calcium channel subunit alpha-1C isoform X1 [KO:K04850 ]
101961077 Plcb3; 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase beta-3 isoform X1 [KO:K05858 ] [EC:3.1.4.11 ]
101961798 Atf4; cyclic AMP-dependent transcription factor ATF-4 [KO:K04374 ]
101962301 Itpr2; inositol 1,4,5-trisphosphate receptor type 2 isoform X1 [KO:K04959 ]
101962775 Itpr1; inositol 1,4,5-trisphosphate receptor type 1 isoform X9 [KO:K04958 ]
101963322 Camk2a; calcium/calmodulin-dependent protein kinase type II subunit alpha isoform X1 [KO:K04515 ] [EC:2.7.11.17 ]
101968534 Camk2g; calcium/calmodulin-dependent protein kinase type II subunit gamma isoform X6 [KO:K04515 ] [EC:2.7.11.17 ]
101968911 Ppp1r1a; protein phosphatase 1 regulatory subunit 1A isoform X1 [KO:K08050 ]
101970348 Ppp3cb; serine/threonine-protein phosphatase 2B catalytic subunit beta isoform isoform X8 [KO:K04348 ] [EC:3.1.3.16 ]
101973345 Ppp3ca; serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
101974296 Camk2d; calcium/calmodulin-dependent protein kinase type II subunit delta isoform X9 [KO:K04515 ] [EC:2.7.11.17 ]
101975512 Ppp3cc; serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
101975553 Itpr3; inositol 1,4,5-trisphosphate receptor type 3 isoform X2 [KO:K04960 ]
101976382 Grin1; glutamate receptor ionotropic, NMDA 1 isoform X4 [KO:K05208 ]
Compound
C01245 D-myo-Inositol 1,4,5-trisphosphate
Reference
Authors
Blitzer RD, Iyengar R, Landau EM.
Title
Postsynaptic signaling networks: cellular cogwheels underlying long-term plasticity.
Journal
Reference
Authors
Soderling TR, Derkach VA.
Title
Postsynaptic protein phosphorylation and LTP.
Journal
Reference
Authors
Poser S, Storm DR.
Title
Role of Ca2+-stimulated adenylyl cyclases in LTP and memory formation.
Journal
Reference
Authors
Xia Z, Storm DR.
Title
The role of calmodulin as a signal integrator for synaptic plasticity.
Journal
Reference
Authors
Purves D, Augustine GJ (ed).
Title
Neuroscience
Journal
Sunderland, Mass.:Sinauer Associates (2004)
Reference
Authors
Lynch MA.
Title
Long-term potentiation and memory.
Journal
Reference
Authors
Kelly PT, Mackinnon RL 2nd, Dietz RV, Maher BJ, Wang J.
Title
Postsynaptic IP3 receptor-mediated Ca2+ release modulates synaptic transmission in hippocampal neurons.
Journal
Reference
Authors
Berridge MJ.
Title
Neuronal calcium signaling.
Journal
Related pathway
KO pathway