Results 41 to 50 of about 87,500 (232)

NsrR from Streptomyces coelicolor is a nitric oxide-sensing [4Fe-4S] cluster protein with a specialized regulatory function [PDF]

open access: yes, 2015
The Rrf2 family transcription factor NsrR controls expression of genes in a wide range of bacteria in response to nitric oxide (NO). The precise form of the NO-sensing module of NsrR is the subject of controversy because NsrR proteins containing either ...
Al-Bassam, Mahmoud   +12 more
core   +1 more source

Regulation of photosynthetic electron flow on dark to light transition by ferredoxin:NADP(H) oxidoreductase interactions

open access: yeseLife, 2021
During photosynthesis, electron transport is necessary for carbon assimilation and must be regulated to minimize free radical damage. There is a longstanding controversy over the role of a critical enzyme in this process (ferredoxin:NADP(H ...
Manuela Kramer   +9 more
doaj   +1 more source

Heterocyst Thylakoid Bioenergetics

open access: yesLife, 2019
Heterocysts are specialized cells that differentiate in the filaments of heterocystous cyanobacteria. Their role is to maintain a microoxic environment for the nitrogenase enzyme during diazotrophic growth.
Ann Magnuson
doaj   +1 more source

The oxidoreductase activity of Rnf balances redox cofactors during fermentation of glucose to propionate in Prevotella

open access: yesScientific Reports, 2023
Propionate is a microbial metabolite formed in the gastrointestinal tract, and it affects host physiology as a source of energy and signaling molecule. Despite the importance of propionate, the biochemical pathways responsible for its formation are not ...
Bo Zhang   +3 more
doaj   +1 more source

Exploiting photosynthesis-driven P450 activity to produce indican in tobacco chloroplasts

open access: yesFrontiers in Plant Science, 2023
Photosynthetic organelles offer attractive features for engineering small molecule bioproduction by their ability to convert solar energy into chemical energy required for metabolism.
Silas B. Mellor   +7 more
doaj   +1 more source

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

open access: yesFEBS Letters, EarlyView.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii   +8 more
wiley   +1 more source

Aerobic Barley Mg-protoporphyrin IX Monomethyl Ester Cyclase is Powered by Electrons from Ferredoxin

open access: yesPlants, 2020
Chlorophyll is the light-harvesting molecule central to the process of photosynthesis. Chlorophyll is synthesized through 15 enzymatic steps. Most of the reactions have been characterized using recombinant proteins.
David Stuart   +6 more
doaj   +1 more source

Navigating Transition Metal‐Dependent Cell Death: Mechanisms, Crosstalk, and Future Directions

open access: yesAdvanced Science, EarlyView.
Transition metals trigger distinct regulated cell death pathways beyond traditional apoptosis. This review examines ferroptosis (iron‐catalyzed lipid peroxidation) and cuproptosis (copper‐induced mitochondrial proteotoxicity), while exploring hypothetical “cobaltosis” as a novel pathway.
Qinghang Song, Yuxuan Yang, Lina Yang
wiley   +1 more source

The energy-converting hydrogenase Ech2 is important for the growth of the thermophilic acetogen Thermoanaerobacter kivui on ferredoxin-dependent substrates

open access: yesMicrobiology Spectrum
Thermoanaerobacter kivui is the thermophilic acetogenic bacterium with the highest temperature optimum (66°C) and with high growth rates on hydrogen (H2) plus carbon dioxide (CO2).
Christoph Baum   +5 more
doaj   +1 more source

An Abundant and Diverse New Family of Electron Bifurcating Enzymes With a Non-canonical Catalytic Mechanism

open access: yesFrontiers in Microbiology, 2022
Microorganisms utilize electron bifurcating enzymes in metabolic pathways to carry out thermodynamically unfavorable reactions. Bifurcating FeFe-hydrogenases (HydABC) reversibly oxidize NADH (E′∼−280 mV, under physiological conditions) and reduce protons
Gerrit J. Schut   +5 more
doaj   +1 more source

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