Deconvolving the roles of Wnt ligands and receptors in sensing and amplification
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van Oudenaarden_Deconvolving the.pdf
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2.19 MB
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Checksum (MD5)
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Author(s)
Tan, Rui Zhen
Ji, Ni
Mentink, Remco A.
Korswagen, Hendrik C.
van Oudenaarden, Alexander
Date Issued
January 2013
Journal
Molecular Systems Biology
Publisher
Nature Publishing Group
Citation
Tan, Rui Zhen et al. “Deconvolving the Roles of Wnt Ligands and Receptors in Sensing and Amplification.” Molecular Systems Biology 9 (2013).
Version
Final published version
Abstract
Establishment of cell polarity is crucial for many biological processes including cell migration and asymmetric cell division. The establishment of cell polarity consists of two sequential processes: an external gradient is first sensed and then the resulting signal is amplified and maintained by intracellular signaling networks usually using positive feedback regulation. Generally, these two processes are intertwined and it is challenging to determine which proteins contribute to the sensing or amplification process, particularly in multicellular organisms. Here, we integrated phenomenological modeling with quantitative single-cell measurements to separate the sensing and amplification components of Wnt ligands and receptors during establishment of polarity of the Caenorhabditis elegans P cells. By systematically exploring how P-cell polarity is altered in Wnt ligand and receptor mutants, we inferred that ligands predominantly affect the sensing process, whereas receptors are needed for both sensing and amplification. This integrated approach is generally applicable to other systems and will facilitate decoupling of the different layers of signal sensing and amplification.
MIT Department
Massachusetts Institute of Technology. Department of Biology
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1038/msb.2012.64
