{"month":"05","abstract":[{"text":"The C-terminal transactivation domain (TAD) of BMAL1 (brain and muscle ARNT-like 1) is a regulatory hub for transcriptional coactivators and repressors that compete for binding and, consequently, contributes to period determination of the mammalian circadian clock. Here, we report the discovery of two distinct conformational states that slowly exchange within the dynamic TAD to control timing. This binary switch results from cis/trans isomerization about a highly conserved Trp-Pro imide bond in a region of the TAD that is required for normal circadian timekeeping. Both cis and trans isomers interact with transcriptional regulators, suggesting that isomerization could serve a role in assembling regulatory complexes in vivo. Toward this end, we show that locking the switch into the trans isomer leads to shortened circadian periods. Furthermore, isomerization is regulated by the cyclophilin family of peptidyl-prolyl isomerases, highlighting the potential for regulation of BMAL1 protein dynamics in period determination.","lang":"eng"}],"language":[{"iso":"eng"}],"scopus_import":"1","citation":{"ama":"Gustafson CL, Parsley NC, Asimgil H, et al. A slow conformational switch in the BMAL1 transactivation domain modulates circadian rhythms. <i>Molecular Cell</i>. 2017;66(4):447-457.e7. doi:<a href=\"https://doi.org/10.1016/j.molcel.2017.04.011\">10.1016/j.molcel.2017.04.011</a>","ista":"Gustafson CL, Parsley NC, Asimgil H, Lee H-W, Ahlbach C, Michael AK, Xu H, Williams OL, Davis TL, Liu AC, Partch CL. 2017. A slow conformational switch in the BMAL1 transactivation domain modulates circadian rhythms. Molecular Cell. 66(4), 447–457.e7.","ieee":"C. L. Gustafson <i>et al.</i>, “A slow conformational switch in the BMAL1 transactivation domain modulates circadian rhythms,” <i>Molecular Cell</i>, vol. 66, no. 4. Elsevier, p. 447–457.e7, 2017.","chicago":"Gustafson, Chelsea L., Nicole C. Parsley, Hande Asimgil, Hsiau-Wei Lee, Christopher Ahlbach, Alicia K. Michael, Haiyan Xu, et al. “A Slow Conformational Switch in the BMAL1 Transactivation Domain Modulates Circadian Rhythms.” <i>Molecular Cell</i>. Elsevier, 2017. <a href=\"https://doi.org/10.1016/j.molcel.2017.04.011\">https://doi.org/10.1016/j.molcel.2017.04.011</a>.","short":"C.L. Gustafson, N.C. Parsley, H. Asimgil, H.-W. Lee, C. Ahlbach, A.K. Michael, H. Xu, O.L. Williams, T.L. Davis, A.C. Liu, C.L. Partch, Molecular Cell 66 (2017) 447–457.e7.","mla":"Gustafson, Chelsea L., et al. “A Slow Conformational Switch in the BMAL1 Transactivation Domain Modulates Circadian Rhythms.” <i>Molecular Cell</i>, vol. 66, no. 4, Elsevier, 2017, p. 447–457.e7, doi:<a href=\"https://doi.org/10.1016/j.molcel.2017.04.011\">10.1016/j.molcel.2017.04.011</a>.","apa":"Gustafson, C. L., Parsley, N. C., Asimgil, H., Lee, H.-W., Ahlbach, C., Michael, A. K., … Partch, C. L. (2017). A slow conformational switch in the BMAL1 transactivation domain modulates circadian rhythms. <i>Molecular Cell</i>. Elsevier. <a href=\"https://doi.org/10.1016/j.molcel.2017.04.011\">https://doi.org/10.1016/j.molcel.2017.04.011</a>"},"keyword":["Cell Biology","Molecular Biology"],"day":"18","date_updated":"2024-03-25T12:19:20Z","issue":"4","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","date_published":"2017-05-18T00:00:00Z","oa":1,"year":"2017","_id":"15155","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1016/j.molcel.2017.04.011"}],"article_type":"original","publication_identifier":{"issn":["1097-2765"]},"status":"public","publisher":"Elsevier","intvolume":"        66","doi":"10.1016/j.molcel.2017.04.011","author":[{"last_name":"Gustafson","full_name":"Gustafson, Chelsea L.","first_name":"Chelsea L."},{"full_name":"Parsley, Nicole C.","first_name":"Nicole C.","last_name":"Parsley"},{"first_name":"Hande","last_name":"Asimgil","full_name":"Asimgil, Hande"},{"last_name":"Lee","full_name":"Lee, Hsiau-Wei","first_name":"Hsiau-Wei"},{"last_name":"Ahlbach","full_name":"Ahlbach, Christopher","first_name":"Christopher"},{"id":"6437c950-2a03-11ee-914d-d6476dd7b75c","last_name":"Michael","full_name":"Michael, Alicia Kathleen","first_name":"Alicia Kathleen"},{"last_name":"Xu","first_name":"Haiyan","full_name":"Xu, Haiyan"},{"first_name":"Owen L.","last_name":"Williams","full_name":"Williams, Owen L."},{"full_name":"Davis, Tara L.","first_name":"Tara L.","last_name":"Davis"},{"first_name":"Andrew C.","full_name":"Liu, Andrew C.","last_name":"Liu"},{"last_name":"Partch","full_name":"Partch, Carrie L.","first_name":"Carrie L."}],"type":"journal_article","extern":"1","title":"A slow conformational switch in the BMAL1 transactivation domain modulates circadian rhythms","date_created":"2024-03-21T07:56:01Z","quality_controlled":"1","page":"447-457.e7","oa_version":"Published Version","volume":66,"article_processing_charge":"No","publication":"Molecular Cell"}