Entry
Name
Cardiac muscle contraction - Oncorhynchus tshawytscha (Chinook salmon)
Description
Contraction of the heart is a complex process initiated by the electrical excitation of cardiac myocytes (excitation-contraction coupling, ECC). In cardiac myocytes, Ca2+ influx induced by activation of voltage-dependent L-type Ca channels (DHP receptors) upon membrane depolarization triggers the release of Ca2+ via Ca2+ release channels (ryanodine receptors) of sarcoplasmic reticulum (SR) through a Ca2+ -induced Ca release (CICR) mechanism. Ca2+ ions released via the CICR mechanism diffuse through the cytosolic space to contractile proteins to bind to troponinC resulting in the release of inhibition induced by troponinI. The Ca2+ binding to troponinC thereby triggers the sliding of thin and thick filaments, that is, the activation of a crossbridge and subsequent cardiac force development and/or cell shortening. Recovery occurs as Ca2+ is pumped out of the cell by the Na+/Ca2+ exchanger (NCX) or is returned to the sarcoplasmic reticulum (SR) by sarco(endo)plasmic Ca2+ -ATPase (SERCA) pumps on the non-junctional region of the SR.
Class
Organismal Systems; Circulatory system
BRITE hierarchy
Pathway map
Ortholog table
Other DBs
Organism
Oncorhynchus tshawytscha (Chinook salmon) [GN:
otw ]
Gene
112240960 voltage-dependent L-type calcium channel subunit alpha-1C isoform X1 [KO:K04850 ]
112255325 voltage-dependent L-type calcium channel subunit alpha-1D [KO:K04851 ]
112244799 voltage-dependent L-type calcium channel subunit alpha-1D-like isoform X1 [KO:K04851 ]
112215828 voltage-dependent L-type calcium channel subunit alpha-1D-like isoform X1 [KO:K04851 ]
112222121 voltage-dependent L-type calcium channel subunit alpha-1D-like [KO:K04851 ]
112221526 voltage-dependent L-type calcium channel subunit alpha-1D-like [KO:K04853 ]
112221688 dihydropyridine-sensitive L-type skeletal muscle calcium channel subunit alpha-1-like isoform X1 [KO:K04857 ]
112225960 voltage-dependent L-type calcium channel subunit beta-1-like isoform X1 [KO:K04862 ]
112258605 voltage-dependent L-type calcium channel subunit beta-1 isoform X1 [KO:K04862 ]
112215649 voltage-dependent L-type calcium channel subunit beta-2 isoform X1 [KO:K04863 ]
112227979 cacnb2a; voltage-dependent L-type calcium channel subunit beta-2a isoform X1 [KO:K04863 ]
112215796 cacnb3a; voltage-dependent L-type calcium channel subunit beta-3a isoform X1 [KO:K04864 ]
112238503 voltage-dependent L-type calcium channel subunit beta-4 isoform X1 [KO:K04865 ]
112225596 voltage-dependent L-type calcium channel subunit beta-4-like isoform X1 [KO:K04865 ]
112253618 voltage-dependent L-type calcium channel subunit beta-4-like isoform X1 [KO:K04865 ]
112245181 voltage-dependent calcium channel subunit alpha-2/delta-1-like [KO:K04858 ]
112219241 voltage-dependent calcium channel subunit alpha-2/delta-1-like isoform X1 [KO:K04858 ]
121843114 voltage-dependent calcium channel subunit alpha-2/delta-1-like [KO:K04858 ]
112263077 voltage-dependent calcium channel subunit alpha-2/delta-2-like isoform X1 [KO:K04859 ]
112214695 cacna2d2b; voltage-dependent calcium channel subunit alpha-2/delta-2b isoform X2 [KO:K04859 ]
112254289 voltage-dependent calcium channel subunit alpha-2/delta-2-like isoform X1 [KO:K04859 ]
112255324 LOW QUALITY PROTEIN: voltage-dependent calcium channel subunit alpha-2/delta-3-like [KO:K04860 ]
112244800 voltage-dependent calcium channel subunit alpha-2/delta-3-like [KO:K04860 ]
112221471 cacna2d3a; voltage-dependent calcium channel subunit alpha-2/delta-3 [KO:K04860 ]
112260024 voltage-dependent calcium channel subunit alpha-2/delta-4-like isoform X1 [KO:K04861 ]
112218193 voltage-dependent calcium channel subunit alpha-2/delta-4 isoform X1 [KO:K04861 ]
121845906 voltage-dependent calcium channel subunit alpha-2/delta-4-like [KO:K04861 ]
112240155 cacng1b; voltage-dependent calcium channel gamma-1 subunit [KO:K04866 ]
112258896 voltage-dependent calcium channel gamma-2 subunit-like [KO:K04867 ]
121845286 voltage-dependent calcium channel gamma-2 subunit-like [KO:K04867 ]
121843776 voltage-dependent calcium channel gamma-3 subunit-like [KO:K04868 ]
112222917 voltage-dependent calcium channel gamma-4 subunit-like [KO:K04869 ]
112230152 voltage-dependent calcium channel gamma-4 subunit-like [KO:K04869 ]
112225774 cacng4b; calcium channel, voltage-dependent, gamma subunit 4b [KO:K04869 ]
112265074 voltage-dependent calcium channel gamma-5 subunit-like isoform X3 [KO:K04870 ]
112230151 voltage-dependent calcium channel gamma-5 subunit-like [KO:K04870 ]
112240321 cacng5b; voltage-dependent calcium channel gamma-5 subunit [KO:K04870 ]
112247683 cacng6b; voltage-dependent calcium channel gamma-6 subunit [KO:K04871 ]
112237259 voltage-dependent calcium channel gamma-6 subunit-like [KO:K04871 ]
112233258 voltage-dependent calcium channel gamma-7 subunit-like [KO:K04872 ]
112244801 voltage-dependent calcium channel gamma-7 subunit-like [KO:K04872 ]
112264837 voltage-dependent calcium channel gamma-7 subunit-like [KO:K04872 ]
112248138 voltage-dependent calcium channel gamma-7 subunit-like [KO:K04872 ]
112229853 voltage-dependent calcium channel gamma-4 subunit-like [KO:K04873 ]
112266029 voltage-dependent calcium channel gamma-4 subunit-like [KO:K04873 ]
112247695 cacng8b; voltage-dependent calcium channel gamma-4 subunit [KO:K04873 ]
112223858 atp2a1l; ATPase sarcoplasmic/endoplasmic reticulum Ca2+ transporting 1, like isoform X1 [KO:K05853 ] [EC:7.2.2.10 ]
112254193 tnnt2b; troponin T, cardiac muscle isoforms isoform X1 [KO:K12045 ]
112215535 myosin regulatory light chain 2, ventricular/cardiac muscle isoform [KO:K10351 ]
112255301 myosin regulatory light chain 2, ventricular/cardiac muscle isoform-like [KO:K10351 ]
112259530 cytochrome b-c1 complex subunit 2, mitochondrial isoform X1 [KO:K00415 ]
112246700 cytochrome b-c1 complex subunit 6, mitochondrial-like [KO:K00416 ]
112215998 cytochrome c oxidase subunit 4 isoform 2, mitochondrial [KO:K02263 ]
112263771 cytochrome c oxidase subunit 4 isoform 1, mitochondrial [KO:K02263 ]
112232699 cytochrome c oxidase subunit 4 isoform 1, mitochondrial [KO:K02263 ]
112237512 cytochrome c oxidase subunit 4 isoform 1, mitochondrial [KO:K02263 ]
112222375 cytochrome c oxidase subunit 4 isoform 2, mitochondrial [KO:K02263 ]
121839623 cytochrome c oxidase subunit 4 isoform 2, mitochondrial-like [KO:K02263 ]
112263663 cytochrome c oxidase subunit 5A, mitochondrial isoform X1 [KO:K02264 ]
112230829 zgc:86599; cytochrome c oxidase subunit 5B, mitochondrial [KO:K02265 ]
112252875 cytochrome c oxidase subunit 7A-related protein, mitochondrial [KO:K02270 ]
112223282 cytochrome c oxidase subunit 7A-related protein, mitochondrial [KO:K02270 ]
112266797 cytochrome c oxidase subunit 7A2, mitochondrial isoform X1 [KO:K02270 ]
112230645 LOW QUALITY PROTEIN: cytochrome c oxidase subunit 8B, mitochondrial [KO:K02273 ]
112257770 atp1b2b; sodium/potassium-transporting ATPase subunit beta-2b isoform X1 [KO:K01540 ]
112251468 sodium/potassium-transporting ATPase subunit beta-233-like [KO:K01540 ]
112228636 sodium/potassium-transporting ATPase subunit beta-2 isoform X1 [KO:K01540 ]
112235047 sodium/potassium-transporting ATPase subunit beta-2 isoform X1 [KO:K01540 ]
112240226 sodium/potassium-transporting ATPase subunit beta-233 isoform X1 [KO:K01540 ]
121846643 atp1b1a; sodium/potassium-transporting ATPase subunit beta-1a [KO:K01540 ]
Compound
Reference
Authors
Bers DM
Title
Calcium cycling and signaling in cardiac myocytes.
Journal
Reference
Authors
Bers DM
Title
Cardiac excitation-contraction coupling.
Journal
Reference
Authors
Endoh M
Title
Signal transduction and Ca2+ signaling in intact myocardium.
Journal
Reference
Authors
Endoh M
Title
Cardiac Ca2+ signaling and Ca2+ sensitizers.
Journal
Reference
Authors
Bers DM, Despa S
Title
Cardiac myocytes Ca2+ and Na+ regulation in normal and failing hearts.
Journal
Reference
Authors
Gordon AM, Homsher E, Regnier M
Title
Regulation of contraction in striated muscle.
Journal
Reference
Authors
Phrommintikul A, Chattipakorn N
Title
Roles of cardiac ryanodine receptor in heart failure and sudden cardiac death.
Journal
Reference
Authors
Lacinova L
Title
Voltage-dependent calcium channels.
Journal
Gen Physiol Biophys 24 Suppl 1:1-78 (2005)
Reference
Authors
Lingrel J, Moseley A, Dostanic I, Cougnon M, He S, James P, Woo A, O'Connor K, Neumann J
Title
Functional roles of the alpha isoforms of the Na,K-ATPase.
Journal
Reference
Authors
Berg JS, Powell BC, Cheney RE
Title
A millennial myosin census.
Journal
Reference
Authors
Parmacek MS, Solaro RJ
Title
Biology of the troponin complex in cardiac myocytes.
Journal
Reference
Authors
Yamashita H, Sugiura S, Fujita H, Yasuda S, Nagai R, Saeki Y, Sunagawa K, Sugi H
Title
Myosin light chain isoforms modify force-generating ability of cardiac myosin by changing the kinetics of actin-myosin interaction.
Journal
Reference
Authors
Pritchard TJ, Kranias EG
Title
Junctin and the histidine-rich Ca2+ binding protein: potential roles in heart failure and arrhythmogenesis.
Journal
Reference
Authors
Landstrom AP, Dobrev D, Wehrens XHT
Title
Calcium Signaling and Cardiac Arrhythmias.
Journal
Related pathway
KO pathway
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