Sample treatment in Mössbauer spectroscopy for protein-related analyses: Nondestructive possibilities to look inside metal-containing biosystems

• Published in: Talanta (Oxford) Vol. 174; pp. 819 - 837
• Main Authors: Kamnev, Alexander A., Tugarova, Anna V.
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.11.2017
• Subjects: 57Co emission Mössbauer spectroscopy; 57Fe transmission Mössbauer spectroscopy; Coordination microenvironment; Metal-containing proteins; Metalloenzymes; 57Co emission Mössbauer spectroscopy; 57Fe transmission Mössbauer spectroscopy; Coordination microenvironment; Metal-containing proteins; Metalloenzymes; Co emission Mössbauer spectroscopy; Fe transmission Mössbauer spectroscopy
• ISSN: 0039-9140; 1873-3573
• DOI: 10.1016/j.talanta.2017.06.057

In this review, the unique possibilities are considered of the 57Fe transmission (TMS) and 57Co emission (EMS) variants of Mössbauer (nuclear γ-resonance) spectroscopy as nondestructive techniques with minimal sample preparation/treatment and a significant analytical potential, with a focus on the analysis of cation-binding sites in metalloproteins. The techniques are shown to provide unique structural and quantitative information on the coordination microenvironment, the chemical state and transformations of the Mössbauer nuclides in sophisticated metal-containing proteins, including those within complicated supramolecular structures, and in microbial cells or tissues. Recent representative examples of analyses of Fe-containing proteins by 57Fe TMS are briefly discussed, along with the newly emerging data on using 57Co EMS for probing the structural organisation of 57Co-doped cation-binding sites in sophisticated biocomplexes including metalloenzymes. Finally, some rare or exotic applications of Mössbauer spectroscopy (including the synchrotron-based methodology) in protein-related studies are outlined. [Display omitted] •Potentials of Mössbauer spectroscopy (MS) in protein-related analyses are reviewed.•57Fe transmission, 57Co emission and synchrotron-based MS variants are discussed.•Metalloproteins, including those within supramolecular structures, are considered.•Recent data on Mössbauer-active nuclides in microbial cells or tissues are surveyed.