Breakthrough Cryo-EM Strategy Enables High-Resolution Imaging of Small Cancer Proteins
Scientists have overcome a major limitation in cryo-electron microscopy by developing a novel fusion strategy that enables high-resolution structural determination of small proteins. The breakthrough method successfully resolved the structure of cancer-related kRasG12C at 3.7 Å resolution, clearly showing how inhibitor drug MRTX849 interacts with its target.
Overcoming Size Limitations in Structural Biology
Structural biologists have reportedly developed an innovative approach that extends the capabilities of cryo-electron microscopy to small protein targets previously considered too challenging for high-resolution analysis, according to recent research published in Scientific Reports. The new method addresses what sources indicate has been a fundamental limitation in the field—the difficulty of imaging proteins smaller than 50 kilodaltons (kDa) using single-particle cryo-EM techniques.