The D-Box-activating Domain (DAD) is a New Proteolysis Signal That Stimulates the Silent D-Box Sequence of Aurora-A
Overview
Affiliations
We have demonstrated previously that Xenopus Aurora-A is degraded at late mitosis by the APC/Fizzy-Related in a D-Box-dependent manner. Here we demonstrate that, although Aurora-B possesses the same D-Box as Aurora-A, Aurora-B is not degraded by this ubiquitin ligase. We have constructed a chimera Aurora-A/B with the N-terminus of Aurora-A and the C-terminus of Aurora-B and we have examined its degradation by APC/Fizzy-Related. We demonstrate that the N-terminus of Aurora-A confers degradation capacity on the C-terminus of Aurora-B and that this feature is blocked by mutation of the conserved D-Box sequence. We characterize the minimal degradation signal at the N-terminus of Aurora-A and demonstrate that its deletion blocks the degradation of this protein by APC/Fizzy-Related. Thus, we conclude that two different degradation signals are required for proteolysis of Aurora-A. The first one, which we designated D-Box-activating domain, within the N-terminal domain of Aurora-A confers the functionality to the second, a silent D-Box, present within the C-terminus of the kinase.
Merk D, Tsiami F, Hirsch S, Walter B, Haeusser L, Maile J Genome Biol. 2024; 25(1):301.
PMID: 39617889 PMC: 11610224. DOI: 10.1186/s13059-024-03438-w.
Grisetti L, Garcia C, Saponaro A, Tiribelli C, Pascut D Cell Prolif. 2024; 57(8):e13641.
PMID: 38590119 PMC: 11294426. DOI: 10.1111/cpr.13641.
Revisiting degron motifs in human AURKA required for its targeting by APC/C.
Abdelbaki A, Ascanelli C, Okoye C, Akman H, Janson G, Min M Life Sci Alliance. 2022; 6(2).
PMID: 36450448 PMC: 9713472. DOI: 10.26508/lsa.202201372.
Mitochondrial Aurora kinase A induces mitophagy by interacting with MAP1LC3 and Prohibitin 2.
Bertolin G, Alves-Guerra M, Cheron A, Burel A, Prigent C, Le Borgne R Life Sci Alliance. 2021; 4(6).
PMID: 33820826 PMC: 8046421. DOI: 10.26508/lsa.202000806.
Su Z, Su C, Huang Y, Yang W, Sampurna B, Ouchi T Cancers (Basel). 2019; 11(7).
PMID: 31269749 PMC: 6678475. DOI: 10.3390/cancers11070927.