ArticleNature communications2024
Replication licensing regulated by a short linear motif within an intrinsically disordered region of origin recognition complex.
Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Distinct roles of MCM2-7 subunits in replication licensing in human cells.Nature communications · 2026Article
- Origin recognition complex subunit 1 functions as an oncogenic driver and therapeutic target in cancer.Discover oncology · 2025Review
- An Orc6 tether mediates ORC binding-site switching during replication origin licensing.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- How similar are the molecular mechanisms of yeast and metazoan genome replication initiation?Biochemical Society transactions · 2025Review
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In eukaryotes, the origin recognition complex (ORC) faciliates the assembly of pre-replicative complex (pre-RC) at origin DNA for replication licensing. Here we show that the N-terminal intrinsically disordered region (IDR) of the yeast Orc2 subunit is crucial for this process. Removing a segment (residues 176-200) from Orc2-IDR or mutating a key isoleucine (194) significantly inhibits replication initiation across the genome. These Orc2-IDR mutants are capable of assembling the ORC-Cdc6-Cdt1-Mcm2-7 intermediate, which exhibits impaired ATP hydrolysis and fails to be convered into the subsequent Mcm2-7-ORC complex and pre-RC. These defects can be partially rescued by the Orc2-IDR peptide. Moreover, the phosphorylation of this Orc2-IDR region by S cyclin-dependent kinase blocks its binding to Mcm2-7 complex, causing a defective pre-RC assembly. Our findings provide important insights into the multifaceted roles of ORC in supporting origin licensing during the G1 phase and its regulation to restrict origin firing within the S phase.
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Registered trials
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