Checkpoint protein Hus1/Mec3 (IPR007150)

Short name: Hus1/Mec3

Overlapping homologous superfamilies


Family relationships


This entry consists of the human Hus1 protein and budding yeast Mec3. They are components of the checkpoint clamp complex involved in the surveillance mechanism that allows the DNA repair pathways to act to restore the integrity of the DNA prior to DNA synthesis or separation of the replicated chromosomes [PMID: 9891048, PMID: 9180692].

Hus1, Rad1, and Rad9 (which share homology with Mec1, Rad17, Ddc1 in budding yeast) are three evolutionarily conserved proteins required for checkpoint control. These proteins are known to form a stable complex. Structurally, the Ddc1-Mec3-Rad17 complex is similar to the PCNA complex, which forms trimeric ring-shaped clamps. Ddc1-Mec3-Rad17 plays a role in checkpoint activation that permits DNA-repair pathways to prevent cell cycle progression in response to DNA damage and replication stress [PMID: 9311982, PMID: 21978893].

GO terms

Biological Process

GO:0000077 DNA damage checkpoint

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0030896 checkpoint clamp complex

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.