NanoSIMS Analysis of Protein Turnover at Subcellular Resolution

The Application

Understanding protein turnover at the subcellular level is essential to uncover how cells maintain structure, function, and long-term health.

The Challenge

Protein turnover often occurs slowly and heterogeneously, making it difficult to quantify using conventional imaging or bulk biochemical approaches. Traditional techniques lack the spatial resolution needed to differentiate turnover at the subcellular scale, especially in highly specialized tissues such as sensory structures in the inner ear. Capturing isotopic variations with sufficient sensitivity—and correlating them to precise intracellular locations—has long been a barrier for cell biologists.

Our Unique Solution

Based on the SIMS technique, CAMECA’s NanoSIMS-HR ion microprobe uniquely overcomes these limitations by combining high precision isotopic measurements with imaging resolution down to 30 nm. This unparalleled capability allows researchers to:

• Quantitatively measure protein turnover at the single-cell and subcellular level
• Map isotopic labels (e.g., ¹⁵Nleucine) with high sensitivity
• Visualize biomolecular processes in situ, preserving structural context
• Follow the intracellular fate of proteins with unprecedented clarity

By integrating NanoSIMS-HR with isotope labeling strategies, scientists can finally capture the subtle, slow, and localized dynamics of protein renewal—something no traditional imaging method can match.

Case Study

NanoSIMS enables researchers to track the fate of biomolecules—such as slowly renewing proteins—inside complex tissues with extraordinary spatial precision. In this study, NanoSIMS was used to measure slow protein turnover within the cochlea of bullfrogs and mice using stable isotope labeling, allowing scientists to visualize and quantify protein dynamics day by day.

Best fit product: CAMECA NanoSIMS-HR

The NanoSIMS-HR is the flagship instrument designed for researchers who require high-resolution, high sensitivity isotopic imaging:

• High resolution imaging down to ~30 nm.
• Unique ion optics design, maximizing transmission at high mass resolution.
• Parallel detection of up to seven masses.

The NanoSIMS-HR analytical performance makes it the most powerful tool available for advanced cell biology studies such as protein turnover, metabolic tracing, intracellular trafficking.

Learn More

Ready to push the boundaries of cellular discovery?

👉 Contact our experts today to discuss your analytical needs, request a demo, or obtain detailed technical specifications.

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