Binding to a GARP complex.

Binding to a NuA4 histone acetyltransferase complex.

Binding to a box C/D snoRNP complex.

Binding to a BBSome complex.

An adrenergic receptor signaling pathway that contributes to a reduction in cardiac muscle contraction. Beta-adrenergic receptor-induced cardiac relaxation is achieved by a GPCR-activated adenylate cyclase generating cAMP; cAMP then activates the cAMP-dependent protein kinase A (PKA), which phosphorylates the sarcoplasmic reticulum (SR) membrane protein PLB. In its non-phosphorylated state, PLB acts as an inhibitor of the ATPase Ca(2+) pump of the cardiac SR (SERCA2a); inhibition of the pump is relieved upon phosphorylation. The pump removes Ca(2+) from the cytoplasm, thereby preventing cytosolic Ca(2+)-dependent activation of contractile proteins, leading to enhanced muscle relaxation.

Binding to an oligosaccharyltransferase complex.

A G protein-coupled acetylcholine receptor signaling pathway, which contributes to a circulatory system process carried out by the heart.

Binding to a TAP complex.

Binding to a chloroplast photosystem II.

Binding to a chloroplast photosystem I.

Binding to a PSII associated light-harvesting complex II.

Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: ATP + H2O + Na+(in) + K+(out) = ADP + phosphate + Na+(out) + K+(in), that contributes to regulating the membrane potential of a cardiac muscle cell.

Binding to a box H/ACA snoRNP complex.

Any process that modulates the establishment or extent of a membrane potential in a cardiac muscle cell (a cardiomyocyte). A membrane potential is the electric potential existing across any membrane arising from charges in the membrane itself and from the charges present in the media on either side of the membrane.

Any process that mediates the transfer of information from a bundle of His cardiomyocyte to a Purkinje myocyte.

Any process that mediates the transfer of information from one cell to another and contributes to the heart process that regulates cardiac muscle contraction; beginning with the generation of an action potential in the sinoatrial node and ending with regulation of contraction of the myocardium.

The process that mediates interactions between a bundle of His cell and its surroundings that contributes to the process of the bundle of His cell communicating with a Purkinje myocyte in cardiac conduction. Encompasses interactions such as signaling or attachment between one cell and another cell, between a cell and an extracellular matrix, or between a cell and any other aspect of its environment.

Any process that mediates the transfer of information from an AV node cardiac muscle cell to a bundle of His cardiomyocyte.

The process that mediates interactions between an AV node cell and its surroundings that contributes to the process of the AV node cell communicating with a bundle of His cell in cardiac conduction. Encompasses interactions such as signaling or attachment between one cell and another cell, between a cell and an extracellular matrix, or between a cell and any other aspect of its environment.

Any process that mediates the transfer of information from a Purkinje myocyte to a ventricular cardiac muscle cell.