?
N-terminal domain of the anaphase-promoting complex subunit Apc5 (or Anapc5) The N-terminal domain of Apc5 interacts with subunits Apc4, Apc15, and CDC23. Apc5 is a subunit of the eukaryotic anaphase-promoting complex/cyclosome (APC/C) which is a multi-subunit ubiquitin ligase that mediates the proteolysis of cell cycle proteins in mitosis and G1. Although Apc5 does not contain a classical RNA binding domain, it binds the poly(A) binding protein (PABP), which directly binds the internal ribosome entry site (IRES) of growth factor 2 mRNA. PABP was found to enhance IRES-mediated translation, whereas Apc5 over-expression counteracted this effect. In addition to its association with the APC/C complex, Apc5 binds much heavier complexes and co-sediments with the ribosomal fraction. The N-terminus of Afi1 serves to stabilize the union between Apc4 and Apc5, both of which lie towards the bottom-front of the APC.
|
Jiyao W et al.(2023). "The conserved domain database in 2023.",