Cited by 176Cell death mechanisms and regulationCancer-related Molecular PathwaysEndoplasmic Reticulum Stress and Disease

ERK1/2‐dependent phosphorylation of BimEL promotes its rapid dissociation from Mcl‐1 and Bcl‐xL

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Ewings, Katherine E, Hadfield‐Moorhouse, Kathryn, Wiggins, Ceri M, Wickenden, Julie A, Balmanno, Kathryn, Gilley, Rebecca, Degenhardt, Kurt, White, Eileen +1 more·2007·The EMBO Journal

Abstract

The proapoptotic protein Bim is expressed de novo following withdrawal of serum survival factors. Here, we show that Bim-/- fibroblasts and epithelial cells exhibit reduced cell death following serum withdrawal in comparison with their wild-type counterparts. In viable cells, Bax associates with Bcl-2, Bcl-x(L) and Mcl-1. Upon serum withdrawal, newly expressed Bim(EL) associates with Bcl-x(L) and Mcl-1, coinciding with the dissociation of Bax from these proteins. Survival factors can prevent association of Bim with pro-survival proteins by preventing Bim expression. However, we now show that even preformed Bim(EL)/Mcl-1 and Bim(EL)/Bcl-x(L) complexes can be rapidly dissociated following activation of ERK1/2 by survival factors. The dissociation of Bim from Mcl-1 is specific for Bim(EL) and requires ERK1/2-dependent phosphorylation of Bim(EL) at Ser(65). Finally, ERK1/2-dependent dissociation of Bim(EL) from Mcl-1 and Bcl-x(L) may play a role in regulating Bim(EL) degradation, since mutations in the Bim(EL) BH3 domain that disrupt binding to Mcl-1 cause increased turnover of Bim(EL). These results provide new insights into the role of Bim in cell death and its regulation by the ERK1/2 survival pathway.

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Crossref · 10.1038/sj.emboj.7601723

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  • The RAS/MEK/ERK pathway regulates many of the same BCL-2 family genes via transcriptional and posttranslational mechanisms.

    “This observation is consistent with reports that the RAS/MEK/ERK pathway also regulates many of these same genes via transcriptional and posttranslational mechanisms (27, 35–37).”

    From Cotargeting a MYC/eIF4A-survival axis improves the efficacy of KRAS inhibitors in lung cancer (2023) · cites this paper as [36]

    The Introduction (page not available) reports that Bim mRNA increases when ERK1/2 signaling is inactivated, and the Results section on ERK1/2 activation reports posttranslational phosphorylation and dissociation of BimEL from Mcl-1 and Bcl-xL. This supports regulation of Bim through both mechanisms, but this paper does not establish that the pathway regulates many BCL-2 family genes. (LLM, conf=0.85)

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Authors
Ewings, K. E., Hadfield‐Moorhouse, K., Wiggins, C. M., Wickenden, J. A., Balmanno, K., Gilley, R., Degenhardt, K., White, E., & Cook, S. J.
Affiliations
  • Babraham Institute (GB)
  • Rutgers, The State University of New Jersey (US)
Corresponding author
Cook, Simon J
Venue
The EMBO Journal
Published
2007-05-24
Volume
26
Issue
12
Pages
2856-2867
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2122549662
Cited by
176
References
45
Citations by year
2026: 3 · 2025: 4 · 2024: 1 · 2023: 5 · 2022: 5 · 2021: 5 · 2020: 6 · 2019: 4 · 2018: 5 · 2017: 7 · 2016: 11 · 2015: 8 · 2014: 11 · 2013: 10 · 2012: 22
FWCI
6.42
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Cancer Research UK
  • Biotechnology and Biological Sciences Research Council (BBS/E/B/0000C199, BB/E02162X/1, BBS/E/B/0000H457, BBS/E/B/0000H151)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
Keywords
BimEL, ERK1/2, Mcl-1, Bcl-xL, Bax, apoptosis, protein phosphorylation, BH3 domain, protein complex dissociation, cell survival factors, serum deprivation, pro-apoptotic proteins, Bcl-2 family proteins
MeSH terms
Bcl-2-Like Protein 11, Cell Line, Humans, Membrane Proteins, Neoplasm Proteins, Phosphorylation, Proto-Oncogene Proteins, Culture Media, Serum-Free, Proto-Oncogene Proteins c-bcl-2, Mitogen-Activated Protein Kinase 1, Mitogen-Activated Protein Kinase 3, Apoptosis Regulatory Proteins, bcl-X Protein, Myeloid Cell Leukemia Sequence 1 Protein

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