Circadian Rhythms Of Superhelical Status Of DNA In Cyanobacteria

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Center for Circadian Biology Symposium Abstract Submission

4. Smith RM, Williams SB. Circadian rhythms in gene transcription imparted by chromosome compaction in the cyanobacterium Synechococcus elongatus. Proc Natl Acad Sci U S A 2006; 1038564-9 5. Woelfle MA, Xu Y, Qin X, Johnson CH. Circadian rhythms of superhelical status of DNA in cyanobacteria. Proc Natl Acad Sci U S A 2007; 104:18819-24. 6.

promoters Structural Insights into a Circadian Oscillator

the control of this circadian program. The S. elongatus chromosome undergoes robust oscil-lations of compaction and decompaction that can be visualized with DNA-binding dyes (Fig. 1C) (11). Moreover, the superhelical status of DNA experiences correlative circadian oscil-lations (Fig. 1D) (12). Such large-scale changes

Oscillations in supercoiling drive circadian gene expression

Oscillations in supercoiling drive circadian gene expression in cyanobacteria Vikram Vijayana,b, Rick Zuzowb, and Erin K. O Sheaa,b,1 aGraduate Program in Systems Biology and bHoward Hughes Medical Institute, Harvard Faculty of Arts and Sciences Center for Systems Biology,

Circadian Rhythms of Superhelical Status of DNA in Cyanobacteria

Circadian rhythms of superhelical status of DNA in cyanobacteria Mark A. Woelfle, Yao Xu, Ximing Qin, and Carl Hirschie Johnson* Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235 Edited by Robert Haselkom, University of Chicago, Chicago, IL, and approved September 17, 2007 (received for review June 27, 2007)

Circadian rhythms of superhelical status of DNA in cyanobacteria

Circadian rhythms of superhelical status of DNA in cyanobacteria Mark A. Woelfle, Yao Xu, Ximing Qin, and Carl Hirschie Johnson* Department of Biological Sciences, Vanderbilt University, Nashville, TN 37235 Edited by Robert Haselkorn, University of Chicago, Chicago, IL, and approved September 17, 2007 (received for review June 27, 2007)

Oscillations in Supercoiling Drive Circadian Gene Expression

DNA sequence characteristics of genes that appear monotonically activated and monotonically repressed by chromosomal relaxation during the circadian cycle are similar to those of supercoiling responsive genes in E. coli. Furthermore, perturbation of superhelical status within

Circadiane Uhr Wie messen Bakterien die Zeit?

the ticking of an in vitro circadian clockwork. PLoS Biol 5:e93 [7] Terauchi K, Kitayama Y, Nishiwaki T et al. (2007) ATPase activity of KaiC determines the basic timing for circadian clock of cyanobacteria. Proc Natl Acad Sci USA 104:16377 16381 [8] Woelfle MA, Xu Y, Qin X et al. (2007) Circadian rhythms of superhelical status of DNA in

Oscillations in Supercoiling Drive Circadian Gene Expression

circadian gene expression patterns by modulating the affinity of the transcription machinery for promoters during the circadian cycle. After this model was proposed, two studies demonstrated circadian oscillations in the compaction and superhelical status of the S. elongatus chromosome and an endogenous plasmid, respectively (13, 14).