Related Experiment Video
Updated: Jul 8, 2026

Using the Horseshoe Crab, Limulus Polyphemus, in Vision Research
Published on: July 3, 2009
γ-Secretase: a horseshoe structure brings good luck
Michael S Wolfe1, Dennis J Selkoe1
1Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
The intramembrane protease gamma-secretase (γ-secretase) structure reveals a horseshoe shape, aiding substrate recognition. This breakthrough advances understanding of its role in cell signaling and Alzheimer's disease research.
Area of Science:
- Biochemistry
- Neuroscience
- Structural Biology
Background:
- The intramembrane protease gamma-secretase (γ-secretase) is crucial for cellular signaling pathways.
- Dysfunction of γ-secretase is implicated in the pathogenesis of Alzheimer's disease.
- The detailed structural features of γ-secretase have remained largely uncharacterized.
Purpose of the Study:
- To elucidate the structural architecture of the γ-secretase complex.
- To understand the molecular basis of substrate recognition by γ-secretase.
- To provide a foundation for developing targeted therapeutics for Alzheimer's disease.
Main Methods:
- Recent structural determination of the γ-secretase complex.
- Analysis of the spatial arrangement of transmembrane helices.
- Identification of the extracellular domain involved in substrate binding.
Main Results:
- The γ-secretase complex adopts a distinct horseshoe-shaped conformation.
- The structure comprises 19 transmembrane helices.
- An extracellular domain is strategically positioned for interaction with substrate molecules.
Conclusions:
- The determined structure offers unprecedented insight into γ-secretase function.
- This structural advance facilitates a deeper understanding of γ-secretase in signaling and disease.
- Future studies aim for higher resolution structures to further unravel its mechanism.
More Related Videos
06:40Quantitative Measurement of γ-Secretase-mediated Amyloid Precursor Protein and Notch Cleavage in Cell-based Luciferase Reporter Assay Platforms
Published on: January 25, 2018
11:57Saccharomyces cerevisiae Models of Alzheimer's Disease to Screen Genes, Mutations, and Chemicals Affecting Amyloid Beta Production by γ-Secretase
Published on: June 24, 2025
Related Concept Videos
Overview of Secretory Vesicles
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Fusion of Secretory Vesicles with the Plasma Membrane
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
Coat Assembly and GTPases
Coat assembly depends on the local availability of phosphatidylinositol phosphates or PIPs and GTP-binding proteins. Adaptor proteins, which link the coat proteins to the membrane, bind to these PIPs and play a crucial role in controlling...
Hedgehog Signaling Pathway
Protein Translocation Machinery on the ER Membrane
Sec61 protein conducting channel
In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
Hedgehog Signaling Pathway