Protein dynamical transition at 110 K.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 22167801.
- Also identified by DOI 10.1073/pnas.1110840108 and PMC identifier 3248492.
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Abstract
Proteins are known to undergo a dynamical transition at around 200 K but the underlying mechanism, physical origin, and relationship to water are controversial. Here we report an observation of a protein dynamical transition as low as 110 K. This unexpected protein dynamical transition precisely correlated with the cryogenic phase transition of water from a high-density amorphous to a low-density amorphous state. The results suggest that the cryogenic protein dynamical transition might be directly related to the two liquid forms of water proposed at cryogenic temperatures.
Medical subject headings
- Cold Temperature
- Plant Proteins
- Protein Conformation