期刊
SCIENCE SIGNALING
卷 2, 期 81, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/scisignal.281pe46
关键词
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资金
- Direct For Computer & Info Scie & Enginr
- Division of Computing and Communication Foundations [0829788] Funding Source: National Science Foundation
Cell signaling systems respond to multiple inputs, such as ligands of cellsurface receptors; and produce multiple outputs, such as changes in gene expression and cellular activities, including motility, proliferation, and death. This macroscopic input-output behavior is generated by a web of molecular interactions that can be viewed as taking place at a lower, microscopic level. These interactions prominently involve posttranslational modification of proteins and the nucleation of protein complexes. Behaviors at both the micro- and macroscopic levels are complex and must be probed systematically and characterized quantitatively as a prelude to the development of a predictive understanding of a cell signaling system. We must also have a theoretical framework or a mechanics within which we can determine how macroscopic behaviors emerge from known microscopic behaviors or change with manipulations of microscopic behaviors. To connect behaviors at both levels, we suggest that a new mechanics is now required. Newly available data support the idea that this mechanics should enable one to track the site-specific details of molecular interactions in a model, such as the phosphorylation status of individual amino acid residues within a protein.
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