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Updated: Aug 20, 2026

Dissection of Local Ca2+ Signals in Cultured Cells by Membrane-targeted Ca2+ Indicators
Published on: March 22, 2019
Integration of signalling pathways regulated by small GTPases and calcium
1Biomedical Center, Ludwig Institute for Cancer Research, Box 595, S-751 24 Uppsala, Sweden. pontus.aspenstrom@licr.uu.se
Abstract:
The Ras superfamily of small GTPases constitutes a large group of structurally and functionally related proteins. They function as signalling switches in numerous signalling cascades in the cell. During the recent years, an increased awareness of a communication between signalling systems employing Ras-like GTPases and signalling systems employing calcium has emerged. For instance, the intensity of the activation of Ras-like GTPases is regulated by calcium-dependent mechanisms, acting on proteins that facilitate the activation or inactivation of the small GTPases. Other Ras-like GTPases have a direct influence on calcium signalling by regulating the activity of certain calcium channels. In addition, several small GTPases collaborate with calcium signalling in regulating cellular processes, such as cell adhesion, cell migration and exocytosis.
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