The largest subunit of the anaphase-promoting complex. It acts primarily as a scaffold for the proper organization and arrangement of subunits. The C-terminal region of Apc1 contains a series of tandem amino acid repeats that are also seen in the 26S proteasome regulatory particle, and may assist with forming and stabilizing protein-protein interactions.

Synonyms: 0, Apc1 Subunit, Anaphase Promoting Complex, Apc1 Subunit, Anaphase Promoting Complex Cyclosome, Apc1 Subunit, Anaphase-Promoting Complex-Cyclosome, Apc1 Subunit, Anaphase-Promoting Complex, Anapc1