KEGG   PATHWAY: ko04260
Entry
ko04260                     Pathway                                
Name
Cardiac muscle contraction
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
Pathway map
ko04260  Cardiac muscle contraction
ko04260

Other DBs
GO: 0060048
Orthology
K00411  UQCRFS1, RIP1, petA; ubiquinol-cytochrome c reductase iron-sulfur subunit [EC:7.1.1.8]
K00412  CYTB, petB; ubiquinol-cytochrome c reductase cytochrome b subunit
K00413  CYC1, CYT1, petC; ubiquinol-cytochrome c reductase cytochrome c1 subunit
K00414  QCR1, UQCRC1; ubiquinol-cytochrome c reductase core subunit 1
K00415  QCR2, UQCRC2; ubiquinol-cytochrome c reductase core subunit 2
K00416  QCR6, UQCRH; ubiquinol-cytochrome c reductase subunit 6
K00417  QCR7, UQCRB; ubiquinol-cytochrome c reductase subunit 7
K00418  QCR8, UQCRQ; ubiquinol-cytochrome c reductase subunit 8
K00419  QCR9, UCRC; ubiquinol-cytochrome c reductase subunit 9
K00420  QCR10, UQCR; ubiquinol-cytochrome c reductase subunit 10
K00476  ASPH; aspartate beta-hydroxylase [EC:1.14.11.16]
K01538  FXYD2, ATP1G1; sodium/potassium-transporting ATPase subunit gamma (FXYD domain-containing ion transport regulator 2)
K01539  ATP1A; sodium/potassium-transporting ATPase subunit alpha [EC:7.2.2.13]
K01540  ATP1B, CD298; sodium/potassium-transporting ATPase subunit beta
K02256  COX1; cytochrome c oxidase subunit 1 [EC:7.1.1.9]
K02261  COX2; cytochrome c oxidase subunit 2
K02262  COX3; cytochrome c oxidase subunit 3
K02263  COX4; cytochrome c oxidase subunit 4
K02264  COX5A; cytochrome c oxidase subunit 5a
K02265  COX5B; cytochrome c oxidase subunit 5b
K02266  COX6A; cytochrome c oxidase subunit 6a
K02267  COX6B; cytochrome c oxidase subunit 6b
K02268  COX6C; cytochrome c oxidase subunit 6c
K02270  COX7A; cytochrome c oxidase subunit 7a
K02271  COX7B; cytochrome c oxidase subunit 7b
K02272  COX7C; cytochrome c oxidase subunit 7c
K02273  COX8; cytochrome c oxidase subunit 8
K04850  CACNA1C, CAV1.2; voltage-dependent calcium channel L type alpha-1C
K04851  CACNA1D, CAV1.3; voltage-dependent calcium channel L type alpha-1D
K04853  CACNA1F, CAV1.4; voltage-dependent calcium channel L type alpha-1F
K04857  CACNA1S, CAV1.1; voltage-dependent calcium channel L type alpha-1S
K04858  CACNA2D1; voltage-dependent calcium channel alpha-2/delta-1
K04859  CACNA2D2; voltage-dependent calcium channel alpha-2/delta-2
K04860  CACNA2D3; voltage-dependent calcium channel alpha-2/delta-3
K04861  CACNA2D4; voltage-dependent calcium channel alpha-2/delta-4
K04862  CACNB1; voltage-dependent calcium channel beta-1
K04863  CACNB2; voltage-dependent calcium channel beta-2
K04864  CACNB3; voltage-dependent calcium channel beta-3
K04865  CACNB4; voltage-dependent calcium channel beta-4
K04866  CACNG1; voltage-dependent calcium channel gamma-1
K04867  CACNG2; voltage-dependent calcium channel gamma-2
K04868  CACNG3; voltage-dependent calcium channel gamma-3
K04869  CACNG4; voltage-dependent calcium channel gamma-4
K04870  CACNG5; voltage-dependent calcium channel gamma-5
K04871  CACNG6; voltage-dependent calcium channel gamma-6
K04872  CACNG7; voltage-dependent calcium channel gamma-7
K04873  CACNG8; voltage-dependent calcium channel gamma-8
K04962  RYR2; ryanodine receptor 2
K05742  SLC9A1, NHE1; solute carrier family 9 (sodium/hydrogen exchanger), member 1
K05849  SLC8A, NCX; solute carrier family 8 (sodium/calcium exchanger)
K05853  ATP2A; P-type Ca2+ transporter type 2A [EC:7.2.2.10]
K05865  TNNC1; troponin C, slow skeletal and cardiac muscles
K09290  TPM3; tropomyosin 3
K10351  MYL2; myosin regulatory light chain 2
K10373  TPM1; tropomyosin 1
K10374  TPM2; tropomyosin 2
K10375  TPM4; tropomyosin 4
K12041  SLC9A6_7, NHE6_7; solute carrier family 9 (sodium/hydrogen exchanger), member 6/7
K12044  TNNI3; troponin I, cardiac muscle
K12045  TNNT2; troponin T, cardiac muscle
K12314  ACTC1; actin, alpha cardiac muscle
K12749  MYL3; myosin light chain 3
K12750  MYL4; myosin light chain 4
K17751  MYH6_7; myosin heavy chain 6/7
K23445  CASQ2; calsequestrin 2
K23449  TRDN; triadin
K23450  HRC; sarcoplasmic reticulum histidine-rich calcium-binding protein
Compound
C00076  Calcium cation
C00080  H+
C00238  Potassium cation
C01330  Sodium cation
Reference
PMID:17988210
  Authors
Bers DM
  Title
Calcium cycling and signaling in cardiac myocytes.
  Journal
Annu Rev Physiol 70:23-49 (2008)
DOI:10.1146/annurev.physiol.70.113006.100455
Reference
PMID:11805843
  Authors
Bers DM
  Title
Cardiac excitation-contraction coupling.
  Journal
Nature 415:198-205 (2002)
DOI:10.1038/415198a
Reference
PMID:16799263
  Authors
Endoh M
  Title
Signal transduction and Ca2+ signaling in intact myocardium.
  Journal
J Pharmacol Sci 100:525-37 (2006)
DOI:10.1254/jphs.CPJ06009X
Reference
PMID:18981594
  Authors
Endoh M
  Title
Cardiac Ca2+ signaling and Ca2+ sensitizers.
  Journal
Circ J 72:1915-25 (2008)
DOI:10.1253/circj.CJ-08-0838
Reference
PMID:16552170
  Authors
Bers DM, Despa S
  Title
Cardiac myocytes Ca2+ and Na+ regulation in normal and failing hearts.
  Journal
J Pharmacol Sci 100:315-22 (2006)
DOI:10.1254/jphs.CPJ06001X
Reference
PMID:10747208
  Authors
Gordon AM, Homsher E, Regnier M
  Title
Regulation of contraction in striated muscle.
  Journal
Physiol Rev 80:853-924 (2000)
DOI:10.1152/physrev.2000.80.2.853
Reference
PMID:16701909
  Authors
Phrommintikul A, Chattipakorn N
  Title
Roles of cardiac ryanodine receptor in heart failure and sudden cardiac death.
  Journal
Int J Cardiol 112:142-52 (2006)
DOI:10.1016/j.ijcard.2005.11.106
Reference
PMID:16096350
  Authors
Lacinova L
  Title
Voltage-dependent calcium channels.
  Journal
Gen Physiol Biophys 24 Suppl 1:1-78 (2005)
Reference
PMID:12763850
  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
Ann N Y Acad Sci 986:354-9 (2003)
DOI:10.1111/j.1749-6632.2003.tb07214.x
Reference
PMID:11294886
  Authors
Berg JS, Powell BC, Cheney RE
  Title
A millennial myosin census.
  Journal
Mol Biol Cell 12:780-94 (2001)
DOI:10.1091/mbc.12.4.780
Reference
PMID:15736582
  Authors
Parmacek MS, Solaro RJ
  Title
Biology of the troponin complex in cardiac myocytes.
  Journal
Prog Cardiovasc Dis 47:159-76 (2004)
DOI:10.1016/j.pcad.2004.07.003
Reference
PMID:14659803
  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
Cardiovasc Res 60:580-8 (2003)
DOI:10.1016/j.cardiores.2003.09.011
Reference
PMID:19403607
  Authors
Pritchard TJ, Kranias EG
  Title
Junctin and the histidine-rich Ca2+ binding protein: potential roles in heart failure and arrhythmogenesis.
  Journal
J Physiol 587:3125-33 (2009)
DOI:10.1113/jphysiol.2009.172171
Reference
PMID:28596175
  Authors
Landstrom AP, Dobrev D, Wehrens XHT
  Title
Calcium Signaling and Cardiac Arrhythmias.
  Journal
Circ Res 120:1969-1993 (2017)
DOI:10.1161/CIRCRESAHA.117.310083
Related
pathway
ko04020  Calcium signaling pathway

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