iron hydrogenase
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Author(s):  
Rebecca Thomas ◽  
Jenny Dunn ◽  
Deborah Dawson ◽  
Helen Hipperson ◽  
Gavin Horsburgh ◽  
...  

Understanding the frequency, spatiotemporal dynamics and impacts of parasite coinfections is fundamental to developing control measures and predicting disease impacts. The European turtle dove (Streptopelia turtur) is one of Europe’s most threatened bird species. High prevalence of infection by the protozoan parasite Trichomonas gallinae has previously been identified, but the role of this and other coinfecting parasites in turtle dove declines remains unclear. Using a high-throughput sequencing approach, we identified seven strains of T. gallinae, including two novel strains, from ITS1/5.8S/ITS2 ribosomal sequences in turtle doves on breeding and wintering grounds, with further intra-strain variation and four novel sub-types revealed by the iron-hydrogenase gene. High spatiotemporal turnover was observed in T. gallinae strain composition, and infection was prevalent in all populations (89–100%). Coinfection by multiple Trichomonas strains was rarer than expected (1% observed compared to 38.6% expected), suggesting either within-host competition, or high mortality of coinfected individuals. In contrast, coinfection by multiple haemosporidians was common (43%), as was coinfection by haemosporidians and T. gallinae (90%), with positive associations between strains of T. gallinae and Leucocytozoon suggesting a mechanism such as parasite-induced immune modulation. We found no evidence for negative associations between coinfections and host body condition. We suggest that longitudinal studies involving the recapture and investigation of infection status of individuals over their lifespan are crucial to understand the epidemiology of coinfections in natural populations.


2021 ◽  
Author(s):  
Miho Isegawa ◽  
Takahiro Matsumoto ◽  
Seiji Ogo

Hydrogen fuel is a promising alternative to fossil fuel. Therefore, efficient hydrogen production is crucial to elucidate the distinctive reactivities of metal hydride species, the intermediates formed during hydrogen activation/evolution...


2020 ◽  
Vol 67 (4) ◽  
pp. 563-573 ◽  
Author(s):  
Kalani Kariyawasam ◽  
Wadih Ghattas ◽  
Yossef López De Los Santos ◽  
Nicolas Doucet ◽  
Sylvain Gaillard ◽  
...  

2020 ◽  
Author(s):  
Shiny Joseph Srinivasan ◽  
Sarah Cleary ◽  
Caroline Paul ◽  
Miguel A. Ramirez ◽  
Kylie Vincent

<p>Robust [NiFe] hydrogenase 1 (Hyd1) from <i>Escherichia coli</i> is shown to have non-native, H<sub>2</sub>-dependent activity for FMN and FAD reduction, and to function as a promising recycling system for FMNH<sub>2</sub> supply to flavoenzymes for chemical synthesis, giving a total turnover number over 10 thousand when coupled with an Old Yellow Enzyme ene reductase. </p>


Author(s):  
Shiny Joseph Srinivasan ◽  
Sarah Cleary ◽  
Caroline Paul ◽  
Miguel A. Ramirez ◽  
Kylie Vincent

<p>Robust [NiFe] hydrogenase 1 (Hyd1) from <i>Escherichia coli</i> is shown to have non-native, H<sub>2</sub>-dependent activity for FMN and FAD reduction, and to function as a promising recycling system for FMNH<sub>2</sub> supply to flavoenzymes for chemical synthesis, giving a total turnover number over 10 thousand when coupled with an Old Yellow Enzyme ene reductase. </p>


2020 ◽  
Author(s):  
Shiny Joseph Srinivasan ◽  
Sarah Cleary ◽  
Caroline Paul ◽  
Miguel A. Ramirez ◽  
Kylie Vincent

<p>Robust [NiFe] hydrogenase 1 (Hyd1) from <i>Escherichia coli</i> is shown to have non-native, H<sub>2</sub>-dependent activity for FMN and FAD reduction, and to function as a promising recycling system for FMNH<sub>2</sub> supply to flavoenzymes for chemical synthesis, giving a total turnover number over 10 million when coupled with an Old Yellow Enzyme ene reductase. </p>


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