Ryanodine receptors, voltage-gated calcium channels and their relationship with protein kinase A in the myocardium

Title:

Ryanodine receptors, voltage-gated calcium channels and their relationship with protein kinase A in the myocardium

Creator:

Miloš Petrovič, Karel Valeš, Putnikovič, B., Djulejič, V., and Mitrovič, D. M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:33d90e97-fb8e-4c09-9f8b-97a49f00b5f6
uuid:33d90e97-fb8e-4c09-9f8b-97a49f00b5f6
issn:0862-8408

Subject:

Fyziologie člověka a srovnávací fyziologie, biochemie, vápník, proteinové kinázy, srdeční selhání, biochemistry, calcium, protein kinases, heart failure, ryanodine receptors, calcium channels, 14, and 612

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

We present a review about the relationship between ryanodine receptors and voltage-gated calcium channels in myocardium, and also how both of them are related to protein kinase A. Ryanodine receptors, which have three subtypes (RyR1-3), are located on the membrane of sarcoplasmic reticulum. Different subtypes of voltage-gated calcium channels interact with ryanodine receptors in skeletal and cardiac muscle tissue. The mechanism of excitation-contraction coupling is therefore different in the skeletal and cardiac muscle. However, in both tissues ryanodine receptors and voltage-gated calcium channels seem to be physically connected. FK-506 binding proteins (FKBPs) are bound to ryanodine receptors, thus allowing their concerted activity, called coupled gating. The activity of both ryanodine receptors and voltage-gated calcium channels is positively regulated by protein kinase A. These effects are, therefore, components of the mechanism of sympathetic stimulation of myocytes. The specificity of this enzyme’s targeting is achieved by using different A kinase adapting proteins. Different diseases are related to inborn or acquired changes in ryanodine receptor activity in cardiac myocytes. Mutations in the cardiac ryanodine receptor gene can cause catecholamine-provoked ventricular tachycardia. Changes in phosphorylation state of ryanodine receptors can provide a credible explanation for the development of heart failure. The restoration of their normal level of phosphorylation could explain the positive effect of beta-blockers in the treatment of this disease. In conclusion, molecular interactions of ryanodine receptors and voltage-gated calcium channels with PKA have a significant physiological role. However, their defects and alterations can result in serious disturbances., M. M. Petrovič, K. Valeš, B. Putnikovič, V. Djulejič, D. M. Mitrovič., and Obsahuje bibliografii a bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2008 Volume:57 | Number:2

Harvested from:

CDK

Metadata only:

false