Results 41 to 50 of about 2,296 (207)

Polyphenol Oxidase Activity on Guaiacyl and Syringyl Lignin Units

Angewandte Chemie, Volume 136, Issue 48, November 25, 2024.
The conversion of lignin‐derived guaiacyl (G) and syringyl (S) compounds into methoxy‐ortho‐diphenols through oxidative ortho‐hydroxylation and ortho‐demethoxylation reactions catalyzed by novel fungal polyphenol oxidases (PPOs) is presented. The formation of o‐diphenols rather than reactive quinones can be steered by the addition of a reductant. These
Caio de O. G. Silva, Peicheng Sun, Kristian Barrett, Mark G. Sanders, Willem J. H. van Berkel, Mirjam A. Kabel, Anne S. Meyer, Jane W. Agger   +7 more
wiley   +2 more sources

Uneven distribution of cobamide biosynthesis and dependence in bacteria predicted by comparative genomics. [PDF]

, 2019
The vitamin B12 family of cofactors known as cobamides are essential for a variety of microbial metabolisms. We used comparative genomics of 11,000 bacterial species to analyze the extent and distribution of cobamide production and use across bacteria ...
Haft, David R, Han, Andrew W, Jackson, Samantha N, Mok, Kenny C, Seth, Erica C, Shelton, Amanda N, Taga, Michiko E   +6 more
core   +1 more source

An ancient pathway combining carbon dioxide fixation with the generation and utilization of a sodium ion gradient for ATP synthesis [PDF]

, 2012
Synthesis of acetate from carbon dioxide and molecular hydrogen is considered to be the first carbon assimilation pathway on earth. It combines carbon dioxide fixation into acetyl-CoA with the production of ATP via an energized cell membrane.
Bertsch, Johannes, Daniel, Rolf, Goenrich, Meike, Gottschalk, Gerhard, Hecker, Michael, Kaster, Anne-Kristin, Müller, Volker, Poehlein, Anja, Schmidt, Silke, Schuchmann, Kai, Thauer, Rudolf K., Thürmer, Andrea, Voigt, Birgit, Vollmers, John   +13 more
core   +4 more sources

Pseudovitamin B12 producing Loigolactobacillus coryniformis enhances soy milk fermentation by Lactobacillus delbrueckii subsp. bulgaricus

Journal of the Science of Food and Agriculture, Volume 105, Issue 10, Page 5239-5245, 15 August 2025.
Abstract BACKGROUND Fermenting soy milk with lactic acid bacteria is challenging. Generally, carbohydrates are added to enhance the acid production in soy milk. However, the yoghurt starter Lactobacillus delbrueckii subsp. bulgaricus did not succeed in fermenting soy milk supplemented with carbohydrates.
Harutoshi Tsuda, Kunihisa Iwai, Natsuki Hayashizaki   +2 more
wiley   +1 more source

Theoretical Modeling of Low-Energy Electronic Absorption Bands in Reduced Cobaloximes [PDF]

, 2014
The reduced Co^I states of cobaloximes are powerful nucleophiles that play an important role in the hydrogen-evolving catalytic activity of these species.
Arantes, Guilherme M., Artero, Vincent, Bhattacharjee, Anirban, Chavarot-Kerlidou, Murielle, Dempsey, Jillian L., Field, Martin J., Fontecave, Marc, Fujita, Etsuko, Gray, Harry B., Muckerman, James T.   +9 more
core   +4 more sources

Evolutionary Trajectories of Methionine Metabolism in Mycobacterium and Its Application to Engineer a Vitamin B12 Whole‐Cell Ribosensor

Microbial Biotechnology, Volume 18, Issue 6, June 2025.
Molecular and functional experiments highlight the relevance of species‐specific polymorphisms in a B12 riboswitch of the Mycobacterium genus. This information provided proof‐of‐concept to engineer a whole‐cell biosensor capable of detecting vitamin B12. ABSTRACT Vitamin B12 metabolism differs among members of the Mycobacterium genus.
Elena Campos‐Pardos, Laura Sanz‐Asensio, Sandra Pérez‐Jiménez, Inmaculada Yruela, Bruno Contreras‐Moreira, Alejandro Toledo‐Arana, Jesús Gonzalo‐Asensio   +6 more
wiley   +1 more source

Lettuce fortification through vitamin B12‐producing bacteria – proof of concept study

Journal of the Science of Food and Agriculture, Volume 105, Issue 6, Page 3343-3354, April 2025.
Abstract BACKGROUND Vitamin B12 (cobalamin) can be produced de novo only by certain bacteria and archaea. It plays a crucial role in the health of animals and humans, which obtain it only through diet, mainly from animal products. This study aimed to identify endophytic bacterial strains capable of synthesizing vitamin B12 and enriching edible plants ...
Sara Pipponzi, Stefanie Primisser, Livio Antonielli, Emilio Stefani, Stephane Compant, Angela Sessitsch, Tanja Kostic   +6 more
wiley   +1 more source

Investigating the origins of B12 biosynthesis in the most ancient roots of the tree of life [PDF]

, 2015
Vitamin B12, also known as B12 or cobalamin, is a vital nutrient required across all branches of life, but the ability to synthesize this complex molecule de novo is limited to only a few archaea and bacteria.
Alicea, Edil, Bibis, Stergios S., Celone, Veronica, Jutla, Tripta, Petrus, Amanda K., Swithers, Kristen S.   +5 more
core  

Identification of abiotic and biotic reductive dechlorination in a chlorinated ethene plume after thermal source remediation by means of isotopic and molecular biology tools [PDF]

, 2016
Thermal tetrachloroethene (PCE) remediation by steam injection in a sandy aquifer led to the release of dissolved organic carbon (DOC) from aquifer sediments resulting in more reduced redox conditions, accelerated PCE biodegradation, and changes in ...
Badin, Alice, Broholm, Mette M, Dennis, Philip, Hunkeler, Daniel, Jacobsen, Carsten S, Palau, Jordi   +5 more
core   +1 more source

Methanol and Carbon Monoxide Metabolism of the Thermophile Moorella caeni

Environmental Microbiology, Volume 27, Issue 4, April 2025.
An omics approach was used to elucidate the C1 metabolism of Moorella caeni DSM 21394 T, which exhibits acetogenic metabolism on methanol and hydrogenogenic metabolism on CO. Our results suggest that respiratory Complex I serves as the primary respiratory enzyme in methanol‐grown cells.
Nicolas A. Vecchini Santaella, Alfons J. M. Stams, Diana Z. Sousa   +2 more
wiley   +1 more source