Joachim Frank: Pioneer of Single-Particle Cryo-Electron Microscopy

Career overview

Trained originally in the physical sciences, Frank applied quantitative image-processing and statistical methods to electron microscopy. Over several decades he developed computational approaches that made it possible to extract high-resolution structural information from images of individual macromolecular particles embedded in vitreous ice. Those advances helped transform cryo-electron microscopy into a mainstream technique for structural biology.

Scientific contributions

• Led the development and refinement of single-particle analysis methods that align and average many two-dimensional projections to reconstruct three-dimensional structures.
• Applied these techniques to study the architecture and dynamics of ribosomes from both bacterial and eukaryotic sources, improving understanding of how they synthesize proteins.
• Integrated image-processing theory with practical workflows used by many laboratories worldwide, influencing software and experimental protocols in cryo-EM.

Awards

In 2017 Frank was one of three recipients of the Nobel Prize in Chemistry, an honor he shared with Jacques Dubochet and Richard Henderson for developments in cryo-electron microscopy that have enabled high-resolution structure determination of biomolecules.