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Systematic name YKL108W
Gene name SLD2
Aliases DRC1
Feature type ORF, Verified
Coordinates Chr XI:234426..235787
Primary SGDID S000001591

Description of YKL108W: Single-stranded DNA origin-binding and annealing protein; required for the initiation of DNA replication; phosphorylated in S phase by cyclin-dependent kinases (Cdks), promoting origin binding, DNA replication and Dpb11p complex formation; component of the preloading complex; unphosphorylated or CDK-phosphorylated Sld2p binds to the MCM2-7 complex;required for the S phase checkpoint[1][2][3][4][5][6][7][8]


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Protein Details

Protein Modification

Modification(s): Phosphorylation

Identified as an efficient substrate of Clb2-Cdk1-as1 in a screen of a proteomic GST-fusion library. [6] [9]



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  1. Bruck I, et al. (2011) Enabling association of the GINS tetramer with the Mcm2-7 complex by phosphorylated Sld2 protein and single-stranded origin DNA. J Biol Chem () SGD PMID 21868389
  2. Kanter DM and Kaplan DL (2011) Sld2 binds to origin single-stranded DNA and stimulates DNA annealing. Nucleic Acids Res 39(7):2580-92 SGD PMID 21109535
  3. Masumoto H, et al. (2002) S-Cdk-dependent phosphorylation of Sld2 essential for chromosomal DNA replication in budding yeast. Nature 415(6872):651-5 SGD PMID 11807498
  4. Muramatsu S, et al. (2010) CDK-dependent complex formation between replication proteins Dpb11, Sld2, Pol {varepsilon}, and GINS in budding yeast. Genes Dev 24(6):602-12 SGD PMID 20231317
  5. Tanaka S, et al. (2007) CDK-dependent phosphorylation of Sld2 and Sld3 initiates DNA replication in budding yeast. Nature 445(7125):328-32 SGD PMID 17167415
  6. 6.0 6.1 Ubersax JA, et al. (2003) Targets of the cyclin-dependent kinase Cdk1. Nature 425(6960):859-64 SGD PMID 14574415
  7. Wang H and Elledge SJ (1999) DRC1, DNA replication and checkpoint protein 1, functions with DPB11 to control DNA replication and the S-phase checkpoint in Saccharomyces cerevisiae. Proc Natl Acad Sci U S A 96(7):3824-9 SGD PMID 10097122
  8. Zegerman P and Diffley JF (2007) Phosphorylation of Sld2 and Sld3 by cyclin-dependent kinases promotes DNA replication in budding yeast. Nature 445(7125):281-5 SGD PMID 17167417
  9. submitted by Jeff Ubersax on 2004-01-27

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