Rhapsody in G proteins

Article Abstract:

Guanine-nucleotide-binding (G) proteins regulate cellular processes. Both heterotrimeric G proteins and small GTPases can be regulated by way of guanine-nucleotide-exchange factors and by hydrolysing GTP to GDP. Mochizuki and colleagues and Jordan and colleagues report a way in which heterotrimeric G proteins can regulate Rap1, a small GTPase. They show that the alpha-subunits of Gi and Go form a complex with Rap1GAP.

Author: Bos, Johannes L., Zwartkruis, Fried J.T.
Cellular signal transduction, G proteins

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Glowing switches

Article Abstract:

Issues are presented concerning the fluorescent resonance energy transfer techniques which were utilized for the analysis of the activation of a GTPase enzyme, named Ras, in real space and time. Previous activation had been biochemical.

Author: Bos, Johannes L.
Chemical structure

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Spatio-temporal images of growth-factor-induced activation of Ras and Rap1

Article Abstract:

Research is presented concerning the investigation of spatio-temporal images of the growth-factor-induced activation of Rap1 and Ras through the utilization of fluorescent resonance energy transfer based sensors.

Author: Miyawaki, Atsushi, Mochizuki, Naoki, Yamashita, Shigeko, Kurokawa, Kazuo, Ohba, Yusuke, Nagai, Takeharu, Matsuda, Michiyuki
Letter to the Editor, Molecular microbiology

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Subjects list: Research, Cover Story, Physiological aspects, Cells (Biology), Proteins, Cells
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