Linked Life Data

21130053

Source:http://linkedlifedata.com/resource/pubmed/id/21130053

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2011-2-7
pubmed:abstractText
DPB11/TopBP1 is an essential evolutionarily conserved gene involved in initiation of DNA replication and checkpoint signaling. Here, we show that Saccharomyces cerevisiae Dpb11 forms nuclear foci that localize to sites of DNA damage in G1, S and G2 phase, a recruitment that is conserved for its homologue TopBP1 in Gallus gallus. Damage-induced Dpb11 foci are distinct from Sld3 replication initiation foci. Further, Dpb11 foci are dependent on the checkpoint proteins Mec3 (9-1-1 complex) and Rad24, and require the C-terminal domain of Dpb11. Dpb11 foci are independent of the checkpoint kinases Mec1 and Tel1, and of the checkpoint mediator Rad9. In a site-directed mutagenesis screen, we identify a separation-of-function mutant, dpb11-PF, that is sensitive to DSB-inducing agents yet remains proficient for DNA replication and the S-phase checkpoint at the permissive temperature. The dpb11-PF mutant displays altered rates of heteroallelic and direct-repeat recombination, sensitivity to DSB-inducing drugs as well as delayed kinetics of mating-type switching with a defect in the DNA synthesis step thus implicating Dpb11 in homologous recombination. We conclude that Dpb11/TopBP1 plays distinct roles in replication, checkpoint response and recombination processes, thereby contributing to chromosomal stability.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1568-7856
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
7
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
210-24
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Dpb11/TopBP1 plays distinct roles in DNA replication, checkpoint response and homologous recombination.
pubmed:affiliation
Department of Biology, University of Copenhagen, Denmark.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't