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ReportsRegulated Fast Nucleocytoplasmic Shuttling Observed by Reversible Protein HighlightingThe observation of the regulation of fast protein dynamics in a cellular context requires the development of reliable technologies. Here, a signal regulation cascade reliant on the stimulus-dependent acceleration of the bidirectional flow of mitogen-activated protein kinase (extracellular signal-regulated kinase) across the nuclear envelope was visualized by reversible protein highlighting. Light-induced conversion between the bright and dark states of a monomeric fluorescent protein engineered from a novel coral protein was employed. Because of its photochromic properties, the protein could be highlighted, erased, and highlighted again in a nondestructive manner, allowing direct observation of regulated fast nucleocytoplasmic shuttling of key signaling molecules. Laboratory for Cell Function and Dynamics, Advanced Technology Development Group, Brain Science Institute, RIKEN, 2-1 Hirosawa, Wako-city, Saitama, 351-0198, Japan. * To whom correspondence should be addressed. E-mail: matsushi{at}brain.riken.jp
The editors suggest the following Related Resources on Science sites:In Science Signaling
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Science. ISSN 0036-8075 (print), 1095-9203 (online)
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