Abstract
Receptor tyrosine kinases (RTKs) are a family of cell-surface receptors that have a key role in regulating critical cellular processes. Here, to understand and precisely control RTK signalling, we report the development of a genetically encoded, photoactivatable Trk (tropomyosin-related kinase) family of RTKs using a light-responsive module based on Arabidopsis thaliana cryptochrome 2. Blue-light stimulation (488-nm) of mammalian cells harbouring these receptors robustly upregulates canonical Trk signalling. A single light stimulus triggers transient signalling activation, which is reversibly tuned by repetitive delivery of blue-light pulses. In addition, the light-provoked process is induced in a spatially restricted and cell-specific manner. A prolonged patterned illumination causes sustained activation of extracellular signal-regulated kinase and promotes neurite outgrowth in a neuronal cell line, and induces filopodia formation in rat hippocampal neurons. These light-controllable receptors are expected to create experimental opportunities to spatiotemporally manipulate many biological processes both in vitro and in vivo.
Original language | English |
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Article number | 4057 |
Journal | Nature communications |
Volume | 5 |
DOIs | |
Publication status | Published - 2014 Jun 4 |
Externally published | Yes |
Bibliographical note
Funding Information:We thank K. Kaibuchi, L. C. Schecterson, and C. L. Tucker for sharing plasmids. In addition, we thank Su Yeon Choi from Eunjoon Kim’s laboratory at IBS/KAIST and Seock Kang from Myoung-Goo Kang’s laboratory at IBS for guiding us how to culture rat primary hippocampal neurons. This work was supported by the National Research Foundation of Korea Stem Cell Program (no. 2011-0019509), the Intelligent Synthetic Biology Center of Global Frontier Project (no. 2011-0031955), the National Leading Research Laboratory Program (to D.K.; 2011-0028772), the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science and Future Planning (2010-0027941) and the Korea Advanced Institute of Science and Technology Future Systems Healthcare Project funded by the Ministry of Science, Information and Communication Technology & Future Planning in Korea.
ASJC Scopus subject areas
- General Chemistry
- General Biochemistry,Genetics and Molecular Biology
- General Physics and Astronomy