Resonance Raman detection of structural dynamics at the active site in hemoglobin.
Year: 1982
Type: article
Abstract: The iron-histidine stretching mode in deoxyhemoglobin displays a large change in frequency and width upon lowering the temperature from 300 to 10 K. The temperature dependence of the data indicates the presence of dynamic process. The dynamics of this mode in frozen hemoglobins can be qualitatively and quantitatively described as a vibrational dephasing via anharmonic coupling to other vibrations of the heme-imidazole system. the effect that occur at the melting transition in the low frequency modes cannot be quantitatively addressed at this point but may be indicative of the introduction of additional degrees of freedom predicated on protein influences that reflect differences in protein quaternary structure.
Authors: M R Ondrias, D L Rousseau, S R Simon
Language: English
Subfield: Cell Biology
Domain: Life Sciences
Open Access status: green
Funder: American Heart Association
OpenAlex ID: W2053183750