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Detecting KaiC phosphorylation rhythms of the cyanobacterial circadian oscillator in vitro and in vivo.
Kim YI, Boyd JS, Espinosa J, Golden SS. Kim YI, et al. Methods Enzymol. 2015;551:153-73. doi: 10.1016/bs.mie.2014.10.003. Epub 2014 Dec 27. Methods Enzymol. 2015. PMID: 25662456 Free PMC article.
The oscillator is composed of three cyanobacterial proteins: KaiA, KaiB, and KaiC. If very pure preparations of these three proteins are mixed in a test tube in the right proportions and with ATP and MgCl2, the phosphorylation states of KaiC will oscillate wi …
The oscillator is composed of three cyanobacterial proteins: KaiA, KaiB, and KaiC. If very pure preparations of these three proteins …
An allele of the crm gene blocks cyanobacterial circadian rhythms.
Boyd JS, Bordowitz JR, Bree AC, Golden SS. Boyd JS, et al. Proc Natl Acad Sci U S A. 2013 Aug 20;110(34):13950-5. doi: 10.1073/pnas.1312793110. Epub 2013 Aug 5. Proc Natl Acad Sci U S A. 2013. PMID: 23918383 Free PMC article.
The crm1 insertion allele phenotypes are distinct from those of an rpaA null; crm1 mutants are able to grow in a light:dark cycle and have no detectable oscillations of KaiC phosphorylation, whereas low-amplitude KaiC phosphorylation rhythms
The crm1 insertion allele phenotypes are distinct from those of an rpaA null; crm1 mutants are able to grow in a light:dark cycle and have n …
Low temperature nullifies the circadian clock in cyanobacteria through Hopf bifurcation.
Murayama Y, Kori H, Oshima C, Kondo T, Iwasaki H, Ito H. Murayama Y, et al. Proc Natl Acad Sci U S A. 2017 May 30;114(22):5641-5646. doi: 10.1073/pnas.1620378114. Epub 2017 May 17. Proc Natl Acad Sci U S A. 2017. PMID: 28515313 Free PMC article.
Here we reduced the temperature to dampen the reconstituted circadian rhythm of phosphorylation of the recombinant cyanobacterial clock protein KaiC. ...Below this critical temperature, the self-sustained rhythms of KaiC phosphorylation t …
Here we reduced the temperature to dampen the reconstituted circadian rhythm of phosphorylation of the recombinant cyanobacter …
Circadian autodephosphorylation of cyanobacterial clock protein KaiC occurs via formation of ATP as intermediate.
Nishiwaki T, Kondo T. Nishiwaki T, et al. J Biol Chem. 2012 May 25;287(22):18030-5. doi: 10.1074/jbc.M112.350660. Epub 2012 Apr 9. J Biol Chem. 2012. PMID: 22493509 Free PMC article.
This approach ensured that only the signals derived from (32)P-labeled KaiC were examined. We detected the transient formation of [(32)P]ATP preceding the accumulation of (32)P(i). ...On the basis of these findings, we can now dissect the dynamics of the KaiC
This approach ensured that only the signals derived from (32)P-labeled KaiC were examined. We detected the transient formation …
Minimal tool set for a prokaryotic circadian clock.
Schmelling NM, Lehmann R, Chaudhury P, Beck C, Albers SV, Axmann IM, Wiegard A. Schmelling NM, et al. BMC Evol Biol. 2017 Jul 21;17(1):169. doi: 10.1186/s12862-017-0999-7. BMC Evol Biol. 2017. PMID: 28732467 Free PMC article.
RESULTS: Using a universal BLAST analyses, we identified putative KaiC-based timing systems in organisms outside as well as variations within Cyanobacteria. ...However, a KaiA-mediated phosphorylation is only detectable in KaiC1 orthologs. CONCLUSION: …
RESULTS: Using a universal BLAST analyses, we identified putative KaiC-based timing systems in organisms outside as well as variation …
Active output state of the Synechococcus Kai circadian oscillator.
Paddock ML, Boyd JS, Adin DM, Golden SS. Paddock ML, et al. Proc Natl Acad Sci U S A. 2013 Oct 1;110(40):E3849-57. doi: 10.1073/pnas.1315170110. Epub 2013 Sep 16. Proc Natl Acad Sci U S A. 2013. PMID: 24043774 Free PMC article.
In cyanobacteria, the timekeeping aspect of the circadian oscillator, composed of the KaiA, KaiB, and KaiC proteins, involves a cyclic progression of phosphorylation states at Ser431 and Thr432 of KaiC. ...Analogously, peak KOA was detected spec …
In cyanobacteria, the timekeeping aspect of the circadian oscillator, composed of the KaiA, KaiB, and KaiC proteins, involves …
Accelerating in vitro studies on circadian clock systems using an automated sampling device.
Furuike Y, Abe J, Mukaiyama A, Akiyama S. Furuike Y, et al. Biophys Physicobiol. 2016 Oct 26;13:235-241. doi: 10.2142/biophysico.13.0_235. eCollection 2016. Biophys Physicobiol. 2016. PMID: 27924279 Free PMC article.
Multiple lanes on a gel can be detected quasi-automatically through an auto-detection procedure implemented in the software, with or without correction for lane 'smiling.' To demonstrate the performance of the suite, robustness of the period against temperature vari …
Multiple lanes on a gel can be detected quasi-automatically through an auto-detection procedure implemented in the software, w …
CikA, an Input Pathway Component, Senses the Oxidized Quinone Signal to Generate Phase Delays in the Cyanobacterial Circadian Clock.
Kim P, Porr B, Mori T, Kim YS, Johnson CH, Diekman CO, Kim YI. Kim P, et al. J Biol Rhythms. 2020 Jun;35(3):227-234. doi: 10.1177/0748730419900868. Epub 2020 Jan 27. J Biol Rhythms. 2020. PMID: 31983264
The rhythm generated by the circadian oscillator must be constantly synchronized with the environmental day/night cycle to make the timekeeping system truly advantageous. ...This in turn changes the phosphorylation state of KaiC-the central oscillator in c
The rhythm generated by the circadian oscillator must be constantly synchronized with the environmental day/night cycle to make the t …
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