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Multidisciplinary Sciences
Sean F. Jordan, Ioannis Ioannou, Hanadi Rammu, Aaron Halpern, Lara K. Bogart, Minkoo Ahn, Rafaela Vasiliadou, John Christodoulou, Amandine Marechal, Nick Lane
Summary: Iron-sulfur (FeS) proteins are ancient and fundamental to life, being involved in electron transfer and CO2 fixation. The study demonstrates that FeS clusters can spontaneously form in the presence of the amino acid cysteine under conditions similar to Hadean alkaline hydrothermal vents, suggesting a plausible mechanism for their emergence at the origin of life.
NATURE COMMUNICATIONS
(2021)
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Ecology
Jia-Wei Zhang, Hong-Po Dong, Li-Jun Hou, Yang Liu, Ya-Fei Ou, Yan-Ling Zheng, Ping Han, Xia Liang, Guo-Yu Yin, Dian-Ming Wu, Min Liu, Meng Li
Summary: Asgard archaea, known for their potential in utilizing various organic substrates in sediment carbon cycling, have a new affiliate phylum called Hermodarchaeota which shows potential in anaerobic degradation of alkanes and aromatic compounds. Through screening metagenomic datasets, genes similar to Hermodarchaeota were identified in marine and freshwater sediments, suggesting widespread presence of Asgard archaea capable of degrading alkanes and aromatics.
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Biochemistry & Molecular Biology
Alexander Katsyv, Volker Mueller
Summary: In this study, it was demonstrated that the energy-converting hydrogenase can reduce protons to produce molecular H-2 by translocating protons across the cell membrane. The purified enzyme showed full retention of its subunits and physiological activities.
JOURNAL OF BIOLOGICAL CHEMISTRY
(2022)
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Chemistry, Inorganic & Nuclear
Flavien Zannini, Sandrine Mathiot, Jeremy Couturier, Claude Didierjean, Nicolas Rouhier
Summary: This study reveals the three-dimensional structure of a natural hybrid protein formed by the fusion of an N-terminal glutaredoxin-like domain and an FDR domain in the marine bacterium Desulfotalea psychrophila Lsv54. The structure provides insights into the dispensability of the variable subunit that normally protects the Fe-S cluster in FDR proteins and the electron flow involving RBX, FDR, and GRX protein domains observed in anaerobic methanogen archaea.
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Biochemistry & Molecular Biology
Mahmudul Hasan, Ipsita Banerjee, Inna Rozman Grinberg, Britt-Marie Sjoberg, Derek T. Logan
Summary: The essential enzyme ribonucleotide reductase (RNR) is highly regulated, and binding of dATP can cause oligomerization that prevents the formation of the active complex. The structural basis for this inhibition of catalysis by oligomerization has been analyzed in this study, revealing a novel type of oligomer formation.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2021)
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Biochemistry & Molecular Biology
Syed Kashif Zaidi, Md Nasrul Hoda, Shams Tabrez, Mohammad Imran Khan
Summary: The restoration of cerebral blood flow (CBF) through remote ischemic conditioning (RIC) is a primary treatment for ischemic stroke. However, NOS3 dysfunction and diabetes may neutralize the benefits of RIC therapy in stroke, but can be turned protective in combination with GSNOR inhibitor (GRI). Our findings support the future clinical trial of RIC in comorbid stroke.
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Biochemical Research Methods
Tom Halliwell, Karl Fisher, Karl A. P. Payne, Stephen E. J. Rigby, David Leys
Summary: A comparative study of four expression strains for cobalamin class-III dependent enzymes revealed that Bacillus megaterium resulted in the highest levels of cofactor incorporation, while co-expression of the cobalamin transporter BtuB in E. coli presented an appropriate balance between cofactor incorporation and protein yield.
PROTEIN EXPRESSION AND PURIFICATION
(2021)
Review
Pharmacology & Pharmacy
William B. Parker, Jaideep V. Thottassery
Summary: DNMT1 depletion is a rational goal in DNA methylation-dependent disorders, and current agents like decitabine and azacitidine have off-target activities limiting their use. Aza-T-dCyd is a promising candidate with less toxicity and higher therapeutic index for selectively depleting DNMT1. Further research is needed to understand its mechanism of action and potential clinical applications.
JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS
(2021)
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Biochemistry & Molecular Biology
Takeshi Haseba, Motoyo Maruyama, Toshio Akimoto, Isao Yamamoto, Midori Katsuyama, Takahisa Okuda
Summary: Lipid accumulation in the liver due to chronic alcohol consumption (CAC) is crucial in the development of alcohol liver disease (ALD). ADH3, acting as GSNOR, plays a key role in the ALD onset by promoting NADH/NAD ratio increase and lipogenesis. ADH3-knockout (Adh3-/-) mice showed no significant pathological changes in the liver, while wild-type (WT) mice exhibited marked hepatic lipid accumulation and increased serum transaminase levels.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
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Biochemistry & Molecular Biology
Molly J. McBride, Mrutyunjay A. Nair, Debangsu Sil, Jeffrey W. Slater, Monica E. Neugebauer, Michelle C. Y. Chang, Amie K. Boal, Carsten Krebs, J. Martin Bollinger
Summary: A newly discovered enzyme BesC from Streptomyces cattleya has been found to catalyze the biosynthesis of beta-ethynyl-L-serine. The enzyme can fragment 4-chloro-L-lysine and L-lysine itself, and the degradation of the intermediate formed during the reaction is influenced by the presence of different analogues. The study also suggests that hydrogen atom extraction plays a role in olefin formation.
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Biochemistry & Molecular Biology
Bin Li, Jennifer Bridwell-Rabb
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Biochemistry & Molecular Biology
Joshua T. Atkinson, Ian J. Campbell, Emily E. Thomas, Sheila C. Bonitatibus, Sean J. Elliott, George N. Bennett, Jonathan J. Silberg
NATURE CHEMICAL BIOLOGY
(2019)
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Multidisciplinary Sciences
Kimberly Rizzolo, Steven E. Cohen, Andrew C. Weitz, Madeline M. Lopez Munoz, Michael P. Hendrich, Catherine L. Drennan, Sean J. Elliott
NATURE COMMUNICATIONS
(2019)
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Biochemistry & Molecular Biology
Lindsey M. Walker, Bin Li, Dimitri Niks, Russ Hille, Sean J. Elliott
JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY
(2019)
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Multidisciplinary Sciences
Divya Prakash, Shikha S. Chauhan, James G. Ferry
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Multidisciplinary Sciences
Hayden Hamby, Bin Li, Katherine E. Shinopoulos, Helena R. Keller, Sean J. Elliott, Gordana Dukovic
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2020)
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Multidisciplinary Sciences
Divya Prakash, Prashanti R. Iyer, Suharti Suharti, Karim A. Walters, Michel Geovanni Santiago-Martinez, John H. Golbeck, Katsuhiko S. Murakami, James G. Ferry
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
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Chemistry, Inorganic & Nuclear
Andrew C. Weitz, Saborni Biswas, Kim Rizzolo, Sean Elliott, Emile L. Bominaar, Michael P. Hendrich
INORGANIC CHEMISTRY
(2020)
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Chemistry, Multidisciplinary
Kimberly Rizzolo, Andrew C. Weitz, Steven E. Cohen, Catherine L. Drennan, Michael P. Hendrich, Sean J. Elliott
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
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Chemistry, Multidisciplinary
Wen Zhu, Lindsey M. Walker, Lizhi Tao, Anthony T. Iavarone, Xuetong Wei, R. David Britt, Sean J. Elliott, Judith P. Klinman
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Physical
Bin Li, Phillip Steindel, Narmien Haddad, Sean J. Elliott
Summary: Modulating the electron-transfer steps in redox reactions has been proven as an effective strategy to regulate enzyme catalysis. By systematically engineering the reduction potential of the electron donor ferredoxin, the study successfully maximized catalytic CO2 reduction.
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Biochemistry & Molecular Biology
Victor Sosa Alfaro, Julius Campecino, Matthew Tracy, Sean J. Elliott, Eric L. Hegg, Nicolai Lehnert
Summary: Cytochrome c nitrite reductases (CcNIR or NrfA) are crucial for conserving usable nitrogen in the soil for the global nitrogen cycle. The study on Geobacter lovleyi NrfA revealed that hemes 4 and 5 serve as electron storage units within the protein, while heme 3 plays a critical role as an electron gateway. Additionally, electrochemical experiments showed a range of reduction potentials for each heme, impacting the enzyme's catalytic activity.
Article
Chemistry, Multidisciplinary
Haoran Pang, Lindsey M. Walker, Alexey Silakov, Pan Zhang, Weitao Yang, Sean J. Elliott, Kenichi Yokoyama
Summary: The diversity of reactions catalyzed by radical S-adenosyl-L-methionine (SAM) enzymes is achieved in part through various mechanisms to quench radical intermediates. Among the SPASM-twitch family, MoaA serves as a representative member with unique cyclization of GTP involving an auxiliary 4Fe-4S cluster. The radical quenching step in MoaA involves a proton-coupled electron transfer mechanism, providing detailed insights into radical SAM enzyme catalysis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Percival Yang-Ting Chen, Bin Li, Catherine L. Drennan, Sean J. Elliott