Reciprocal antagonism of PIN1-APC/CCDH1 governs mitotic protein stability and cell cycle entry
- PMID: 38622115
- PMCID: PMC11018817
- DOI: 10.1038/s41467-024-47427-w
Reciprocal antagonism of PIN1-APC/CCDH1 governs mitotic protein stability and cell cycle entry
Abstract
Induced oncoproteins degradation provides an attractive anti-cancer modality. Activation of anaphase-promoting complex (APC/CCDH1) prevents cell-cycle entry by targeting crucial mitotic proteins for degradation. Phosphorylation of its co-activator CDH1 modulates the E3 ligase activity, but little is known about its regulation after phosphorylation and how to effectively harness APC/CCDH1 activity to treat cancer. Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 (PIN1)-catalyzed phosphorylation-dependent cis-trans prolyl isomerization drives tumor malignancy. However, the mechanisms controlling its protein turnover remain elusive. Through proteomic screens and structural characterizations, we identify a reciprocal antagonism of PIN1-APC/CCDH1 mediated by domain-oriented phosphorylation-dependent dual interactions as a fundamental mechanism governing mitotic protein stability and cell-cycle entry. Remarkably, combined PIN1 and cyclin-dependent protein kinases (CDKs) inhibition creates a positive feedback loop of PIN1 inhibition and APC/CCDH1 activation to irreversibly degrade PIN1 and other crucial mitotic proteins, which force permanent cell-cycle exit and trigger anti-tumor immunity, translating into synergistic efficacy against triple-negative breast cancer.
© 2024. The Author(s).
Conflict of interest statement
S.K., G.M.W., N.S.G., X.Z.Z., and K.P.L. are inventors of several issued patents and/or pending patent applications on PIN1, PIN1 biomarkers, PIN1 inhibitors and PIN1 inhibitor combination to treat human diseases; X.Z.Z. and K.P.L. are the scientific founders and former scientific advisors of and own equity in Pinteon. Their interests were reviewed and managed by BIDMC in accordance with its conflict-of-interest policy. G.M.W. reports research funding from Glaxo Smith Kline (institutional funding). W.W. is a co-founder and consultant for the Rekindle Therapeutics. N.S.G. is a founder, science advisory board member (SAB) and equity holder in Syros, C4, Allorion, Lighthorse, Inception, Voronoi, Matchpoint, Shenandoah (board member), Larkspur (board member) and Soltego (board member). The Gray lab receives or has received research funding from Novartis, Takeda, Astellas, Taiho, Jansen, Kinogen, Arbella, Deerfield and Sanofi. All other authors do not have any competing interests.
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