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Biochemical Purification and Proteomic Characterization of Amyloid Fibril Cores from the Brain
Published on: April 28, 2022
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A computational suite for the structural and functional characterization of amyloid aggregates
Zengjie Xia1,2, Yunzhao Wu1,2, Jeff Yui Long Lam1,2
1Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK.
Cell Reports Methods
|July 10, 2023
Summary
We created the Aggregate Characterization Toolkit (ACT), an automated software for analyzing protein aggregate size and activity. This open-source tool aids in studying diseases like Alzheimer's and developing new diagnostics.
Area of Science:
- Biophysics
- Computational Biology
- Neuroscience
Background:
- Protein aggregates are implicated in various human diseases, including Alzheimer's.
- Accurate characterization of these aggregates is crucial for understanding disease mechanisms and developing therapeutics.
- Existing methods for aggregate analysis can be time-consuming and lack high-throughput capabilities.
Purpose of the Study:
- To develop a fully automated computational suite, the Aggregate Characterization Toolkit (ACT).
- To enable high-throughput measurement of aggregate number, size, and permeabilizing activity.
- To provide an accessible, open-source tool for researchers studying protein aggregates.
Main Methods:
- Developed ACT using existing core algorithms for automated image analysis.
- Integrated methods for processing images from both diffraction-limited and super-resolution microscopy.
- Validated ACT using simulated ground-truth aggregate images and real-world Alzheimer's disease protein aggregates.
Main Results:
- ACT accurately measures the number, size, and permeabilizing activity of protein aggregates.
- The toolkit demonstrates high-throughput batch processing capabilities for multiple samples.
- Validated performance on simulated data and human-derived protein aggregates from Alzheimer's disease.
Conclusions:
- ACT is an accurate, fast, and accessible tool for aggregate characterization.
- It is expected to advance the study of amyloid intermediates and related diseases.
- ACT will aid in developing early diagnostics and screening for therapeutic antibodies against toxic aggregates.
