This domain is found close to the C-terminus of the APC1 protein which is a component of the anaphase promoting complex/cyclosome (APC/C), a cell cycle-regulated E3 ubiquitin ligase that controls progression through mitosis and the G1 phase of the cell cycle.

1: Atomic structure of the APC/C and its mechanism of protein ubiquitination. Chang L, Zhang Z, Yang J, McLaughlin SH, Barford D; Nature. 2015;522:450-454. PMID:26083744

2: Molecular mechanism of APC/C activation by mitotic phosphorylation. Zhang S, Chang L, Alfieri C, Zhang Z, Yang J, Maslen S, Skehel M, Barford D; Nature. 2016;533:260-264. PMID:27120157

3: Cryo-EM of Mitotic Checkpoint Complex-Bound APC/C Reveals Reciprocal and Conformational Regulation of Ubiquitin Ligation. Yamaguchi M, VanderLinden R, Weissmann F, Qiao R, Dube P, Brown NG, Haselbach D, Zhang W, Sidhu SS, Peters JM, Stark H, Schulman BA; Mol Cell. 2016;63:593-607. PMID:27522463

4: Molecular basis of APC/C regulation by the spindle assembly checkpoint. Alfieri C, Chang L, Zhang Z, Yang J, Maslen S, Skehel M, Barford D; Nature. 2016;536:431-436. PMID:27509861

5: Cyclin A2 degradation during the spindle assembly checkpoint requires multiple binding modes to the APC/C. Zhang S, Tischer T, Barford D; Nat Commun. 2019;10:3863. PMID:31455778