Cited by 121DNA Repair MechanismsFungal and yeast genetics researchGenomics and Chromatin Dynamics

Yeast DNA replication protein Dpb11 activates the Mec1/ATR checkpoint kinase

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Navadgi-Patil, Vasundhara M., Burgers, Peter M.·2008·Journal of Biological Chemistry

Abstract

The Saccharomyces cerevisiae Mec1-Ddc2 protein kinase (human ATR-ATRIP) initiates a signal transduction pathway in response to DNA damage and replication stress to mediate cell cycle arrest. The yeast DNA damage checkpoint clamp Ddc1-Mec3-Rad17 (human Rad9-Hus1-Rad1: 9-1-1) is loaded around effector DNA and thereby activates Mec1 kinase. Dpb11 (Schizosaccharomyces pombe Cut5/Rad4 or human TopBP1) is an essential protein required for the initiation of DNA replication and has a role in checkpoint activation. In this study, we demonstrate that Dpb11 directly activates the Mec1 kinase in phosphorylating the downstream effector kinase Rad53 (human Chk1/2) and DNA bound RPA. However, DNA was not required for Dpb11 to function as an activator. Dpb11 and yeast 9-1-1 independently activate Mec1, but substantial synergism in activation was observed when both activators were present. Our studies suggest that Dpb11 and 9-1-1 may partially compensate for each other during yeast checkpoint function.

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Crossref · 10.1074/jbc.m807435200

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  • In S. cerevisiae, Mec1 can be activated by Ddc1 and by Dpb11 recruited through Ddc1.

    “In S. cerevisiae the Mec1 apical kinase can be activated both by the Ddc1 subunit of the checkpoint clamp and by the adaptor protein Dpb11 which is recruited at the lesion through interaction with Ddc1 [19–23].”

    From Mind the gap: keeping UV lesions in check (2011) · cites this paper as [22]

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Authors
Navadgi-Patil, V. M., & Burgers, P. M.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Burgers, Peter M.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2008-12
Volume
283
Issue
51
Pages
35853-35859
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2116184125
Cited by
121
References
46
Citations by year
2026: 2 · 2025: 2 · 2024: 3 · 2023: 5 · 2021: 6 · 2020: 7 · 2019: 9 · 2018: 4 · 2017: 7 · 2016: 8 · 2015: 9 · 2014: 7 · 2013: 5 · 2012: 7
FWCI
5.49
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of General Medical Sciences (R01GM083970, GM-32431, R01GM032431)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
Dpb11, Mec1 kinase, ATR checkpoint, DNA damage checkpoint, DNA replication checkpoint, Rad53, RPA, kinase activation, DNA damage response, Saccharomyces cerevisiae
MeSH terms
Cell Cycle, DNA Damage, DNA Replication, DNA-Binding Proteins, Enzyme Activation, Humans, Nuclear Proteins, Saccharomyces cerevisiae, Schizosaccharomyces, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Saccharomyces cerevisiae Proteins, Intracellular Signaling Peptides and Proteins

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