Research output: Contribution to journal › Article › peer-review
E2F1 proteolysis via SCF-cyclin F underlies synthetic lethality between cyclin F loss and Chk1 inhibition. / Burdova, Kamila; Yang, Hongbin; Faedda, Roberta et al.
In: EMBO Journal, Vol. 38, No. 20, e101443, 15.10.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - E2F1 proteolysis via SCF-cyclin F underlies synthetic lethality between cyclin F loss and Chk1 inhibition
AU - Burdova, Kamila
AU - Yang, Hongbin
AU - Faedda, Roberta
AU - Hume, Samuel
AU - Chauhan, Jagat
AU - Ebner, Daniel
AU - Kessler, Benedikt M.
AU - Vendrell, Iolanda
AU - Drewry, David H.
AU - Wells, Carrow I.
AU - Hatch, Stephanie B.
AU - Dianov, Grigory L.
AU - Buffa, Francesca M.
AU - D'Angiolella, Vincenzo
N1 - Publisher Copyright: © 2019 The Authors. Published under the terms of the CC BY 4.0 license
PY - 2019/10/15
Y1 - 2019/10/15
N2 - Cyclins are central engines of cell cycle progression in conjunction with cyclin-dependent kinases (CDKs). Among the different cyclins controlling cell cycle progression, cyclin F does not partner with a CDK, but instead forms via its F-box domain an SCF (Skp1-Cul1-F-box)-type E3 ubiquitin ligase module. Although various substrates of cyclin F have been identified, the vulnerabilities of cells lacking cyclin F are not known. Thus, we assessed viability of cells lacking cyclin F upon challenging them with more than 180 different kinase inhibitors. The screen revealed a striking synthetic lethality between Chk1 inhibition and cyclin F loss. Chk1 inhibition in cells lacking cyclin F leads to DNA replication catastrophe. Replication catastrophe depends on accumulation of the transcription factor E2F1 in cyclin F-depleted cells. We find that SCF-cyclin F controls E2F1 ubiquitylation and degradation during the G2/M phase of the cell cycle and upon challenging cells with Chk1 inhibitors. Thus, Cyclin F restricts E2F1 activity during the cell cycle and upon checkpoint inhibition to prevent DNA replication stress. Our findings pave the way for patient selection in the clinical use of checkpoint inhibitors.
AB - Cyclins are central engines of cell cycle progression in conjunction with cyclin-dependent kinases (CDKs). Among the different cyclins controlling cell cycle progression, cyclin F does not partner with a CDK, but instead forms via its F-box domain an SCF (Skp1-Cul1-F-box)-type E3 ubiquitin ligase module. Although various substrates of cyclin F have been identified, the vulnerabilities of cells lacking cyclin F are not known. Thus, we assessed viability of cells lacking cyclin F upon challenging them with more than 180 different kinase inhibitors. The screen revealed a striking synthetic lethality between Chk1 inhibition and cyclin F loss. Chk1 inhibition in cells lacking cyclin F leads to DNA replication catastrophe. Replication catastrophe depends on accumulation of the transcription factor E2F1 in cyclin F-depleted cells. We find that SCF-cyclin F controls E2F1 ubiquitylation and degradation during the G2/M phase of the cell cycle and upon challenging cells with Chk1 inhibitors. Thus, Cyclin F restricts E2F1 activity during the cell cycle and upon checkpoint inhibition to prevent DNA replication stress. Our findings pave the way for patient selection in the clinical use of checkpoint inhibitors.
KW - cell cycle
KW - checkpoints
KW - Chk1
KW - cyclin F
KW - F-box proteins
KW - BETA-TRCP
KW - MEDIATED DEGRADATION
KW - KINASE INHIBITOR
KW - CDC25A
KW - DNA-REPLICATION
KW - POTENT
KW - TUMOR-SUPPRESSOR
KW - CHECKPOINT
KW - STRESS
KW - ATR
UR - http://www.scopus.com/inward/record.url?scp=85070839576&partnerID=8YFLogxK
U2 - 10.15252/embj.2018101443
DO - 10.15252/embj.2018101443
M3 - Article
C2 - 31424118
AN - SCOPUS:85070839576
VL - 38
JO - EMBO Journal
JF - EMBO Journal
SN - 0261-4189
IS - 20
M1 - e101443
ER -
ID: 21258091