Science & Cell：三篇文章介绍小鼠中发现同一个的生理节奏基因
另一篇Science文章讲述，纽约大学医学院Luca Busino率领的研究小组在体内实验中发现，FBXL3蛋白与CRY蛋白结合，驱动CRY降解，没有FBSL3的情况下CRY降解缓慢，延长了CLOCL：BMAL1的再活化所需时间，导致小鼠生理周期延长。
MRC Harwell的Patrick Nolan说，体内实验直接证明蛋白酶体降解，通过F-box蛋白，是维持哺乳动物生理节奏动态平衡的重要调节机制。
英文原文：
Published Online April 26, 2007
Science DOI: 10.1126/science.1141138
Submitted on February 12, 2007
Accepted on April 18, 2007
The After-Hours Mutant Mouse Reveals a Role for Fbxl3 in Determining Mammalian Circadian Period
Sofia I. H. Godinho 1, Elizabeth S. Maywood 2, Linda Shaw 1, Valter Tucci 1, Alun R. Barnard 1, Luca Busino 3, Michele Pagano 3, Rachel Kendall 1, Mohamed M. Quwailid 1, M. Rosario Romero 1, John O'Neill 2, Johanna E. Chesham 2, Debra Brooker 1, Zuzanna Lalanne 1, Michael H. Hastings 2, Patrick M. Nolan 1*
1 Medical Research Council (MRC) Mammalian Genetics Unit, Harwell, Oxfordshire OX11 0RD, UK.
2 MRC Laboratory of Molecular Biology, Neurobiology Division, Hills Road, Cambridge CB2 2QH, UK.
3 Department of Pathology, NYU Cancer Institute, New York University School of Medicine, 550 First Avenue, MSB 599, New York, NY 10016, USA.
* To whom correspondence should be addressed.
Patrick M. Nolan , E-mail: p.nolan@har.mrc.ac.uk
By screening N-ethyl-N-nitrosourea-mutagenized animals for alterations in rhythms of wheel-running activity, we identified a mouse mutation, after hours (Afh). The mutation, a Cys358Ser substitution in Fbxl3, an F-box protein with leucine-rich repeats, results in long free-running rhythms of about 27 hours in homozygotes. Circadian transcriptional and translational oscillations are attenuated in Afh mice. The Afh allele significantly affected PER2 expression and delayed the rate of CRY protein degradation in PER2::LUCIFERASE tissue slices. Our in vivo and in vitro studies reveal a central role for Fbxl3 in mammalian circadian timekeeping.
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