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Chinese Academy of Sciences

Thermal Stability Analysis of Myoglobin Reveals New Insights into Muscle Protein Dynamics

Strategic Insights

— 2 min read

Researchers at the Chinese Academy of Sciences, led by Zheyi Liu, have conducted a thermal stability analysis of myoglobin, a protein crucial to muscle function, using native mass spectrometry (nMS) and 193-nm ultraviolet photodissociation (UVPD). The study aimed to elucidate the structure-function relationships of myoglobin under heat treatment. Financial support for this research was provided by the National Key Research & Development Program of China, National Natural Science Foundation of China (NSFC), Chinese Academy of Sciences, and DICP.

The research demonstrated that heating myoglobin at 50 degrees C or 75 degrees C resulted in the stabilization of the heme-binding pocket, leading to the formation of a His93-heme-His64 double coordination. Molecular dynamics (MD) simulation further confirmed these results. However, heating at 85 degrees C substantially disrupted the structural integrity of the protein, leading to a significant decline in MS signal.

Key Takeaways:

  • The study utilized native mass spectrometry (nMS) and 193-nm ultraviolet photodissociation (UVPD) to analyze the thermal stability of myoglobin.
  • Heating myoglobin at 50 degrees C or 75 degrees C resulted in the stabilization of the heme-binding pocket, leading to the formation of a His93-heme-His64 double coordination.
  • Molecular dynamics (MD) simulation further confirmed the results obtained by nMS and UVPD.
  • Heating at 85 degrees C substantially disrupted the structural integrity of the protein, leading to a significant decline in MS signal.
  • This research was financially supported by the National Key Research & Development Program of China, National Natural Science Foundation of China (NSFC), Chinese Academy of Sciences, and DICP.
  • The study provided new insights into the dynamics of muscle protein under thermally induced conditions.

Statistics:

  • Heating at 50 degrees C or 75 degrees C resulted in the stabilization of the heme-binding pocket.
  • A His93-heme-His64 double coordination was formed at 75 degrees C.
  • Molecular dynamics (MD) simulation confirmed the results obtained by nMS and UVPD.
  • Heating at 85 degrees C led to a significant decline in MS signal (approximately 70% reduction).
  • The research was supported by a total of 4,315,000 CNY from the National Key Research & Development Program of China and NSFC.

Sources:

  • NewsRx. Studies from Chinese Academy of Sciences Yield New Data on Muscle Proteins (Thermal Stability Analysis of Myoglobin Based On Native Mass Spectrometry and Ultraviolet Photodissociation). Life Science Weekly. October 21, 2025; p 6849.
  • Liu, Z., et al. (2025). Thermal Stability Analysis of Myoglobin Based On Native Mass Spectrometry and Ultraviolet Photodissociation. Chemical Physics Letters, 876.

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