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International Affairs Students Current Students Alumni Faculty/Staff Careers--> TOHOKU UNIVERSITYCREATING GLOBAL EXCELLENCE Search 日本語 Contact Tohoku University --> About Facts & Figures Facilities Organization Chart History President's Message Top Global University Project Designated National University Global Network Promotional Videos Academics Undergraduate Graduate Courses in English Exchange Programs Summer Programs Double Degree Programs Academic Calendar Syllabus Admissions Undergraduate Admissions Graduate Admissions Fees and Expenses Financial Aid Research Feature Highlights Research Releases University Research News Research Institutes Visitor Research Center Research Profiles Academic Research Staff Campus Life International Support Office IT Services Facilities Dining & Shops Campus Bus Clubs & Circles News University News Research--> Arts & Culture Health & Sports Campus & Community Press Release--> International Visit Alumni Careers Events Exhibits Music Special Event Lecture Alumni--> Map & Directions Campus Maps & Bus--> Facilities Map--> TOHOKUUNIVERSITY About Academics Admissions Research Campus Life News Events International Affairs Students Current Students Alumni Faculty/Staff Promotional Videos Subscribe to our Newsletter Map & Directions Contact Jobs & Vacancies Emergency Information Site Map 日本語 Close Home Research News A new sensor to detect physiological levels of nitrate and nitrite Research News A new sensor to detect physiological levels of nitrate and nitrite 2015-12-09 A team led by Professor Takafumi Uchida has created a new technique for visualizing the dynamics of nitrate (NO3-) and nitrite (NO2−), both markers of nitric oxide in a cell. Nitric oxide is a critical second messenger in the body, playing roles in vascular homeostasis, neurotransmission and host defense. The new technology is called sNOOOpy which stands for "sensor for NO3-/NO2− in physiology." sNOOOpy is a genetically encoded intermolecular fluorescence resonance energy transfer (FRET)-based indicator that senses levels of nitrate and nitrite. sNOOOpy utilizes the NO3-/NO2--responsive two-component system of NasS and NasT system in the root nodule bacterium Bradyhizobium japonicum. sNOOOpy in a human cancer line, HeLa cell. NO3− concentration increasing at intervals. The researchers demonstrated with in vitro and cell culture studies that sNOOOpy can monitor intracellular levels in the micromolar range of nitrate and nitrite in real time. The authors say, "sNOOOpy is simple and potentially applicable to a wide variety of living cells. It is expected to provide insights into NO3−/NO2− dynamics in various organisms, including plants and animals." They also believe sNOOOpy will be useful for discovering new drugs and agricultural research. This research was originally published in the Journal of Biological Chemistry © the American Society for Biochemistry and Molecular Biology. sNOOOpy in a human cancer line, HeLa cell. NO3− concentration is increasing at intervals of 10, 20, 30 min. Publication Details : Authors: Masafumi Hidaka†, Aina Gotoh†, Taiki Shimizu, Kiwamu Minamisawa, Hiromi Imamura and Takafumi Uchida († equal contribution) Title: Visualization of NO3−/NO2− Dynamics in Living cells by Fluorescence Resonance Energy Transfer (FRET) Imaging Employing a Rhizobial Two-Component Regulatory System. Journal: Journal of Biological Chemistry (paper of the week) DOI: 10.1074/jbc.M115.687632 Contact: Takafumi Uchida Email: uchidatbiochem.tohoku.ac.jp Archives 2014&＃24180; 2015&＃24180; 2016&＃24180; 2017&＃24180; 2018&＃24180; 2019&＃24180; 2020&＃24180; 2021&＃24180; 2022&＃24180; 2023&＃24180; Page Top About Tohoku University Academics Admissions Research Campus Life News Events International Affairs Students Alumni Promotional Videos Subscribe to our Newsletter Map & Directions Contact Tohoku University Jobs & Vacancies Emergency Information Site Map Media Enquiries Parent & Family Support Public Facilities Contact Tohoku University