Cited by 271Calpain Protease Function and RegulationProtein Kinase Regulation and GTPase SignalingS100 Proteins and Annexins

Epidermal Growth Factor Activates m-Calpain (Calpain II), at Least in Part, by Extracellular Signal-Regulated Kinase-Mediated Phosphorylation

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Glading, A., Bodnar, R. J., Reynolds, I. J., Shiraha, H., Satish, L., Potter, D. A., Blair, H. C., Wells, A.·2004·Molecular and Cellular Biology

Abstract

How m-calpain is activated in cells has challenged investigators because in vitro activation requires near-millimolar calcium. Previously, we demonstrated that m-calpain activation by growth factors requires extracellular signal-regulated kinase (ERK); this enables tail deadhesion and allows productive motility. We now show that ERK directly phosphorylates and activates m-calpain both in vitro and in vivo. We identified serine 50 as required for epidermal growth factor (EGF)-induced calpain activation in vitro and in vivo. Replacing the serine with alanine limits activation by EGF and subsequent cell deadhesion and motility. A construct with the serine converted to glutamic acid displays constitutive activity in vivo; expression of an estrogen receptor fusion construct produces a tamoxifen-sensitive enzyme. Interestingly, EGF-induced m-calpain activation occurs in the absence of increased intracellular calcium levels; EGF triggers calpain even in the presence of intracellular calcium chelators and in calcium-free media. These data provide evidence that m-calpain can be activated through the ERK cascade via direct phosphorylation and that this activation may occur in the absence of cytosolic calcium fluxes.

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  1. [2]Allen, F. D., C. F. Asnes, P. Chang, E. L. Elson, D. A. Lauffenburger, and A. Wells. 2002. EGF-induced matrix contraction is modulated by calpain. Wound Repair Regen. 10:67-76. [DOI] [PubMed] [Google Scholar]
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Authors
Glading, A., Bodnar, R. J., Reynolds, I. J., Shiraha, H., Satish, L., Potter, D. A., Blair, H. C., & Wells, A.
Affiliations
  • Departments of Pathology
  • Pharmacology
  • Indiana University School of Medicine (US)
  • University of Pittsburgh (US)
  • Veterans Health Administration (US)
Corresponding author
Wells, A.
Venue
Molecular and Cellular Biology
Published
2004-03-01
Volume
24
Issue
6
Pages
2499-2512
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2153992286
Cited by
271
References
55
Citations by year
2026: 3 · 2025: 4 · 2024: 6 · 2023: 7 · 2022: 7 · 2021: 8 · 2020: 6 · 2019: 6 · 2018: 5 · 2017: 10 · 2016: 11 · 2015: 9 · 2014: 11 · 2013: 16 · 2012: 15
FWCI
9.68
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Veterans Affairs
  • National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Calpain Protease Function and Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › S100 Proteins and Annexins
Keywords
m-calpain, epidermal growth factor, ERK signaling, protein phosphorylation, calpain activation, cell motility, calcium-independent activation
MeSH terms
Animals, Base Sequence, Binding Sites, Calcium, Calpain, Cell Line, Cell Movement, Enzyme Activation, Epidermal Growth Factor, Humans, Phosphorylation, Recombinant Proteins, Serine, Mutagenesis, Site-Directed, DNA, Complementary, Amino Acid Substitution, Mitogen-Activated Protein Kinases, MAP Kinase Signaling System, Mice, In Vitro Techniques

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