[HTML][HTML] Involvement of high-valent manganese-oxo intermediates in oxidation reactions: realisation in nature, nano and molecular systems

M Balamurugan, N Saravanan, H Ha, YH Lee… - Nano …, 2018 - Springer
Manganese plays multiple role in many biological redox reactions in which it exists in
different oxidation states from Mn (II) to Mn (IV). Among them the high-valent manganese …

Solving a new R2lox protein structure by microcrystal electron diffraction

H Xu, H Lebrette, MTB Clabbers, J Zhao, JJ Griese… - Science …, 2019 - science.org
Microcrystal electron diffraction (MicroED) has recently shown potential for structural biology.
It enables the study of biomolecules from micrometer-sized 3D crystals that are too small to …

Self-sacrificial tyrosine cleavage by an Fe:Mn oxygenase for the biosynthesis of para-aminobenzoate in Chlamydia trachomatis

OM Manley, HN Phan, AK Stewart… - Proceedings of the …, 2022 - National Acad Sciences
Chlamydia protein associating with death domains (CADD) is involved in the biosynthesis of
para-aminobenzoate (pABA), an essential component of the folate cofactor that is required …

Orientational Jahn–teller isomerism in the dark‐stable state of Nature's water oxidase

M Drosou, G Zahariou, DA Pantazis - Angewandte Chemie, 2021 - Wiley Online Library
The tetramanganese–calcium cluster of the oxygen‐evolving complex of photosystem II
adopts electronically and magnetically distinct but interconvertible valence isomeric forms in …

The first state in the catalytic cycle of the water-oxidizing enzyme: identification of a water-derived μ-hydroxo bridge

T Lohmiller, V Krewald, A Sedoud… - Journal of the …, 2017 - ACS Publications
Nature's water-splitting catalyst, an oxygen-bridged tetramanganese calcium (Mn4O5Ca)
complex, sequentially activates two substrate water molecules generating molecular O2. Its …

Site-Differentiated MnIIFeII Complex Reproducing the Selective Assembly of Biological Heterobimetallic Mn/Fe Cofactors

AL Poptic, YP Chen, T Chang, YS Chen… - Journal of the …, 2023 - ACS Publications
Class Ic ribonucleotide reductases (RNRIc) and R2-like ligand-binding oxidases (R2lox) are
known to contain heterobimetallic MnIIFeII cofactors. How these enzymes assemble MnIIFeII …

Pulsed Multifrequency Electron Paramagnetic Resonance Spectroscopy Reveals Key Branch Points for One-vs Two-Electron Reactivity in Mn/Fe Proteins

EC Kisgeropoulos, YJ Gan, SM Greer… - Journal of the …, 2022 - ACS Publications
Traditionally, the ferritin-like superfamily of proteins was thought to exclusively use a diiron
active site in catalyzing a diverse array of oxygen-dependent reactions. In recent years …

[HTML][HTML] Characterization and Preliminary Application of a Novel Lipoxygenase from Enterovibrio norvegicus

B Zhang, M Chen, B Xia, Z Lu, KS Khoo, PL Show, F Lu - Foods, 2022 - mdpi.com
Lipoxygenases have proven to be a potential biocatalyst for various industrial applications.
However, low catalytic activity, low thermostability, and narrow range of pH stability largely …

Key structural motifs balance metal binding and oxidative reactivity in a heterobimetallic Mn/Fe protein

EC Kisgeropoulos, JJ Griese, ZR Smith… - Journal of the …, 2020 - ACS Publications
Heterobimetallic Mn/Fe proteins represent a new cofactor paradigm in bioinorganic
chemistry and pose countless outstanding questions. The assembly of the active site defies …

[HTML][HTML] Structural basis for oxygen activation at a heterodinuclear manganese/iron cofactor

JJ Griese, R Kositzki, P Schrapers, RMM Branca… - Journal of Biological …, 2015 - ASBMB
Two recently discovered groups of prokaryotic di-metal carboxylate proteins harbor a
heterodinuclear Mn/Fe cofactor. These are the class Ic ribonucleotide reductase R2 proteins …