Cited by 468Protein Kinase Regulation and GTPase SignalingDevelopmental Biology and Gene RegulationAxon Guidance and Neuronal Signaling

Sprouty, an intracellular inhibitor of Ras signaling

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Casci, Tanita, Vinós, Javier, Freeman, Matthew·1999·Cell

Abstract

Sprouty was identified in a genetic screen as an inhibitor of Drosophila EGF receptor signaling. The Egfr triggers cell recruitment in the eye, and sprouty- eyes have excess photoreceptors, cone cells, and pigment cells. Sprouty's function is, however, more widespread. We show that it also interacts genetically with the receptor tyrosine kinases Torso and Sevenless, and it was first discovered through its effect on FGF receptor signaling. In contrast to an earlier proposal that Sprouty is extracellular, we show by biochemical analysis that Sprouty is an intracellular protein, associated with the inner surface of the plasma membrane. Sprouty binds to two intracellular components of the Ras pathway, Drk and Gap1. Our results indicate that Sprouty is a widespread inhibitor of Ras pathway signal transduction.

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Crossref · 10.1016/s0092-8674(00)80576-0

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  • Four of the validated miR-21 target genes are known negative regulators of the Ras/MEK/ERK pathway: Spry1, Spry2, Btg2, and Pdcd4.

    “Four of the validated miR-21 target genes are known negative regulators of the Ras/MEK/ERK pathway: sprouty 1 (Spry1), sprouty 2 (Spry2), B-cell translocation gene 2 (Btg2), and programmed cell death 4 (Pdcd4).”

    From Modulation of K-Ras-Dependent Lung Tumorigenesis by MicroRNA-21 (2010) · cites this paper as Casci et al., 1999

    The Discussion identifies Drosophila Sprouty as an inhibitor of Ras/MAP kinase signaling. The paper predicts that mammalian Sprouty homologs may have the same function, but does not establish it for Spry1 or Spry2 specifically. It does not address Btg2, Pdcd4, or whether these genes are validated miR-21 targets. (LLM, conf=0.88)

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Authors
Casci, T., Vinós, J., & Freeman, M.
Affiliations
MRC Laboratory of Molecular Biology (GB)
Corresponding author
Freeman, Matthew
Venue
Cell
Publisher
Elsevier BV
Published
1999-03
Volume
96
Issue
5
Pages
655-665
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2082773871
Cited by
467
References
62
Citations by year
2026: 2 · 2025: 2 · 2024: 5 · 2023: 8 · 2022: 8 · 2021: 13 · 2020: 13 · 2019: 4 · 2018: 10 · 2017: 11 · 2016: 19 · 2015: 16 · 2014: 12 · 2013: 15 · 2012: 17
FWCI
10.93
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Axon Guidance and Neuronal Signaling
Keywords
Sprouty, Ras signaling, EGF receptor signaling, Drosophila, Torso receptor, FGF receptor signaling, DRK, GAP1, receptor tyrosine kinase, pigment cells, plasma membrane
MeSH terms
Animals, Cells, Cultured, Cysteine, Depression, Chemical, Drosophila melanogaster, Eye, Eye Abnormalities, Eye Proteins, Membrane Glycoproteins, Membrane Proteins, Morphogenesis, Proteins, Signal Transduction, ras Proteins, Insect Proteins, ras GTPase-Activating Proteins, Receptor Protein-Tyrosine Kinases, Drosophila Proteins, Macromolecular Substances, ErbB Receptors

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