FEATURES

FAMILY

DESCRIPTION

Also known as DDI1_YEAST, DDI1, VSM1. Aspartic protease (PubMed:21266539). Appears to act as negative regulator of constitutive exocytosis (PubMed:10330187, PubMed:12051757). May act at the level of secretory vesicle docking and fusion as a competitive inhibitor of SNARE assembly (PubMed:12925750). Acts as a linker between the 19S proteasome and polyubiquitinated proteins like the HO endonuclease and UFO1 via UBA domain interactions with ubiquitin for their subsequent degradation (PubMed:17144915, PubMed:16478980). Required for S-phase checkpoint control (PubMed:11238935, PubMed:17144915). Forms homodimers. Interacts with RAD23. These interactions are mediated by the UBA domain. Is also able to bind ubiquitin and polyubiquitinated proteins. Interacts with the SNAREs SNC1, SNC2, SSO1, TLG1 and TLG2. Binding to SSO1 is promoted by the phosphorylation of 'Ser-49' of SSO1 by TKP1.

EXTERNAL LINKS

DDI1

DNA damage-inducible protein 1

DDI1

Molecular Synopsis