This domain is found at the N-terminal end of Anaphase-promoting complex subunit 5 from humans (Apc5), 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. This domain has an alpha-helical fold [1-4]. It is normally found in association with Pfam:PF12862.

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: Atomic-Resolution Structures of the APC/C Subunits Apc4 and the Apc5 N-Terminal Domain. Cronin NB, Yang J, Zhang Z, Kulkarni K, Chang L, Yamano H, Barford D; J Mol Biol. 2015;427:3300-3315. PMID:26343760

3: 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

4: 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