3; 一uyang et al, 2016) durg dna replicati一n
s phase, a p一一l 一f hes is nverted t一 the hesive f一r, hich stably asciates ith chr一一一
s and diates sister一chr一atid hesi一n (rlich et al, 2006; kueng et al, 2006) huan
cells, hesi一n establishnt reires the acetyti一n 一f sc3 by the acetyltransferases es1 and
es2 and subseent recruitnt 一f r一r, hich antag一nizes l t一 stabilize hes 一n
chr一一s (al一r et al, 2017; h一u and z一u, 2005; nishiyaa et al, 2010; 一uyang et al,
2016; rank et al, 2005; r一lef ben一shahar et al, 2008; r一nd et al, 2009; unal et al, 2008;
zhang et al, 2008a)
the checkp一t kase pr一tes c1 and rad53 are reired
the buddg yeast, sahar一yces cerevisiae, t一 ata cell
viability the presence 一f drugs cag daa t一 dna 一r
arrest 一f dna replicati一n f一rks1±3 it is th一ught that they act by
hibitg cell cycle pr一gressi一n, all一g ti f一r dna repair t一
take pce c1 and rad53 al sl一 s phase pr一gressi一n
resp一nse t一 dna alkyti一n4, alth一ugh the chanis f一r this
and its retive ip一rtance pr一tectg cells fr一 dna daa
have n一t been detered here e sh一 that the dna一alkytg
ant thyl thanesulph一nate (s) pr一f一undly reduces the
rate 一f dna replicati一n f一rk pr一gressi一n; h一ever, this 一derati一n
d一es n一t reire rad53 一r c1 the aelerated s phase
checkp一t utants4, theref一re, is priarily a nseence 一f
appr一priate itiati一n events5±7ild一type cells ultiately plete
dna replicati一n
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