Cell Cycle-Dependent Mobility of Cdc45 Determined in vivo by Fluorescence Correlation Spectroscopy
|Title:||Cell Cycle-Dependent Mobility of Cdc45 Determined in vivo by Fluorescence Correlation Spectroscopy||Authors:||Broderick, Ronan
|Permanent link:||http://hdl.handle.net/10197/4997||Date:||19-Apr-2012||Abstract:||Eukaryotic DNA replication is a dynamic process requiring the co-operation of specific replication proteins. We measured the mobility of eGFP-Cdc45 by Fluorescence Correlation Spectroscopy (FCS) in vivo in asynchronous cells and in cells synchronized at the G1/S transition and during S phase. Our data show that eGFP-Cdc45 mobility is faster in G1/S transition compared to S phase suggesting that Cdc45 is part of larger protein complex formed in S phase. Furthermore, the size of complexes containing Cdc45 was estimated in asynchronous, G1/S and S phase-synchronized cells using gel filtration chromatography; these findings complemented the in vivo FCS data. Analysis of the mobility of eGFP-Cdc45 and the size of complexes containing Cdc45 and eGFP-Cdc45 after UVC-mediated DNA damage revealed no significant changes in diffusion rates and complex sizes using FCS and gel filtration chromatography analyses. This suggests that after UV-damage, Cdc45 is still present in a large multi-protein complex and that its mobility within living cells is consistently similar following UVC-mediated DNA damage.||Type of material:||Journal Article||Publisher:||Public Library of Science||Copyright (published version):||2012 Public Library of Science||Keywords:||eGFP-Cdc45; Eukaryotic DNA replication; Fluorescence Correlation Spectroscopy (FCS)||DOI:||10.1371/journal.pone.0035537||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||SBI Research Collection|
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