Related Experiment Video
Updated: Jun 25, 2025
13:43
A Robust Single-Particle Cryo-Electron Microscopy cryo-EM Processing Workflow with cryoSPARC, RELION, and Scipion
Published on: January 31, 2022
13.1K
Disulfi de constrained Fabs overcome target size limitation for high-resolution single-particle cryo-EM
Jennifer E Kung1, Matthew C Johnson1, Christine C Jao1
1Department of Structural Biology, Genentech Inc., South San Francisco, CA 94080, USA.
Biorxiv : the Preprint Server for Biology
|May 27, 2024
Summary
Researchers developed Rigid-Fabs, conformationally rigid scaffolds, to enable high-resolution cryo-electron microscopy (cryo-EM) of small proteins. This breakthrough overcomes limitations in determining structures of disease-relevant small proteins.
Area of Science:
- Structural Biology
- Biochemistry
- Biophysics
Background:
- High-resolution protein structures are crucial for understanding biological mechanisms and drug discovery.
- While cryo-electron microscopy (cryo-EM) excels for large proteins, small proteins (<50 kDa) remain challenging due to low signal-to-noise and alignment issues.
- Existing methods using flexible scaffolds often result in poor resolution of the target protein.
Conclusions:
- Developed a novel method for creating rigid antibody fragment scaffolds (Rigid-Fabs) for cryo-EM.
- Successfully enabled high-resolution cryo-EM structure determination of previously intractable small proteins.
- Established a versatile approach to expand the scope of cryo-EM for studying small proteins relevant to human diseases.
