Compartmentalized cAMP signalling is important in the regulation of Ca(2+) cycling in the heart.

Abstract:

:Co-ordinated myocyte handling of calcium is essential for efficient excitation-contraction coupling in the heart. The calcium cycling activity can be modulated by adrenergic stimulation and subsequent phosphorylation. Important functional consequences of phosphorylation include a greater influx of calcium through the voltage-dependent L-type Ca(2+) channel and a greater release of calcium from SR (sarcoplasmic reticulum) through the ryanodine R2 receptor. Furthermore, a more efficient reuptake through SERCA2 (sarcoplasmic/endoplasmic-reticulum Ca(2+)-ATPase 2) is a result of phosphorylation of its regulatory protein phospholamban. Compartmentalized signalling is important in this signalling cascade, and A-kinase-anchoring proteins play a central role by providing a high level of specificity.

journal_name

Biochem Soc Trans

authors

Lygren B,Taskén K

doi

10.1042/BST0340489

subject

Has Abstract

pub_date

2006-08-01 00:00:00

pages

489-91

issue

Pt 4

eissn

0300-5127

issn

1470-8752

pii

BST0340489

journal_volume

34

pub_type

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