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Notch Signaling Pathway

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...

Notch Signaling Pathway

Notch Signaling Pathway

The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...

Non-Canonical Wnt Signaling Pathways

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...

Non-Canonical Wnt Signaling Pathways

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...

Intracellular Signaling Affects Focal Adhesions

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...

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Related Experiment Video

Updated: May 25, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

Published on: February 28, 2017

Endocytic routes to Notch activation.

Martin Baron¹

¹Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK. mbaron@manchester.ac.uk

Seminars in Cell & Developmental Biology

|January 31, 2012

Summary

Notch signaling activation involves receptor cleavage, but mechanisms remain unclear. This review proposes distinct cellular location-based pathways contributing to signaling robustness.

Area of Science:

Cellular signaling pathways
Molecular biology
Developmental biology

Background:

Notch signaling is crucial for gene expression, activated by ligand binding and receptor cleavage.
The precise mechanisms and cellular locations of Notch receptor activation are not fully understood.
Conflicting data exists regarding the role of endocytosis in Notch signal activation.

Purpose of the Study:

To review and reconcile conflicting data on Notch signaling activation mechanisms.
To propose distinct activation pathways occurring in different cellular compartments.
To elucidate how these pathways contribute to the pool of active Notch intracellular domain.

Main Methods:

Literature review and synthesis of existing research data.

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Antibody Uptake Assay for Tracking Notch/Delta Endocytosis During the Asymmetric Division of Zebrafish Radial Glia Progenitors

Antibody Uptake Assay for Tracking Notch/Delta Endocytosis During the Asymmetric Division of Zebrafish Radial Glia Progenitors

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Last Updated: May 25, 2026

Stimulation of Notch Signaling in Mouse Osteoclast Precursors

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Antibody Uptake Assay for Tracking Notch/Delta Endocytosis During the Asymmetric Division of Zebrafish Radial Glia Progenitors

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Published on: January 20, 2023

Analysis of studies on receptor endocytosis and Notch activation.

Examination of the role of Deltex and ESCRT complexes in Notch signaling.

Main Results:

Endocytosis's role in Notch signaling is debated: essential or supplementary.
Notch can be activated in the endosomal pathway independently of ligands via Deltex.
Disruption of ESCRT complexes can lead to ectopic Notch signaling.

Conclusions:

Reconciling data suggests distinct Notch activation mechanisms in different cellular locations.
These distinct pathways converge to generate the soluble Notch intracellular domain pool.
The proposed signaling network enhances developmental robustness against variations.