| Primary Identifier | IPR026217 | Type | Family |
| Short Name | Ddc1 |
| description | This entry represents the budding yeast Ddc1, which is homologous to the fission yeast and human Rad9.DNA-damage checkpoint protein 1 (Ddc1) forms a checkpoint clamp complex with Mec3 and Rad17 [, ]. This complex plays a role in the surveillance system that permits DNA-repair pathways to restore the integrity of DNA in advance of DNA synthesis or separation of replicated chromosomes, thereby ensuring that new phases are not entered if DNA is damaged []. Ddc1 can activate Mec1 (the principal checkpoint protein kinase, human ATR homologue) in G1 phase. In G2 phase, Ddc1 can either activate Mec1 directly or recruit Dpb11 (ortholog of human TopBP1) and subsequently activate Mec1 []. Ddc1 does not have the DNA exonuclease function []. |
