Results 71 to 80 of about 76,623 (339)

Ammonia Oxidation by the Arctic Terrestrial Thaumarchaeote Candidatus Nitrosocosmicus arcticus Is Stimulated by Increasing Temperatures

open access: yesFrontiers in Microbiology, 2019
Climate change is causing arctic regions to warm disproportionally faster than those at lower latitudes, leading to alterations in carbon and nitrogen cycling, and potentially higher greenhouse gas emissions.
Ricardo J. Eloy Alves   +9 more
doaj   +1 more source

Electron cryo-microscopy reveals the structure of the archaeal thread filament

open access: yesNature Communications, 2022
Pili are filamentous appendages on the surface of bacteria and archaea, and play roles in multiple processes such as adhesion, motility and horizontal gene transfer. Here, Gaines et al. describe the structure of a new type of pilus, termed ‘thread’, from
Matthew C. Gaines   +10 more
doaj   +1 more source

At the core of the Archaea. [PDF]

open access: yesProceedings of the National Academy of Sciences, 1996
There are three kinds of taxonomists, according to Ernst Mayr (1). Pheneticists group species by overall phenotypic similarity, renouncing evolutionary theory and explanation. Cladists, conversely, concern themselves exclusively with genealogy. Phenotypic resemblance between two taxa (lizards and crocodiles as reptiles, for instance), counts for ...
openaire   +3 more sources

A Unique THN Motif Is Critical for Enabling Efficient C‐Terminal Traceless Cleavage

open access: yesAdvanced Science, EarlyView.
THN is identified as the key motif to facilitate the rapid traceless cleavage of gp41‐1. The deflection of THN motif not only avoids the interaction between C‐exteins and active sites, but also separates Asp107 away from Asn125. In addition, a flexible block F contributes to faster C‐cleavage.
Ruocheng Gu   +7 more
wiley   +1 more source

mibPOPdb: An online database for microbial biodegradation of persistent organic pollutants

open access: yesiMeta, Volume 1, Issue 4, December 2022., 2022
This study presents the Microbial Biodegradation of Persistent Organic Pollutants Database (mibPOPdb) database, a web‐accessible literature‐based microbial biodegradation of persistent organic pollutants (POPs) resource. We also developed a robust chemical biodegradability prediction model with Graph Neural Networks.
Tanyaradzwa R. Ngara   +2 more
wiley   +1 more source

Length, Protein-Protein Interactions, and Complexity [PDF]

open access: yes, 2004
The evolutionary reason for the increase in gene length from archaea to prokaryotes to eukaryotes observed in large scale genome sequencing efforts has been unclear. We propose here that the increasing complexity of protein-protein interactions has driven the selection of longer proteins, as longer proteins are more able to distinguish among a larger ...
arxiv   +1 more source

Physical Model of the Immune Response of Bacteria Against Bacteriophage Through the Adaptive CRISPR-Cas Immune System [PDF]

open access: yesPhys. Biol. 10 (2013) 025004, 2014
Bacteria and archaea have evolved an adaptive, heritable immune system that recognizes and protects against viruses or plasmids. This system, known as the CRISPR-Cas system, allows the host to recognize and incorporate short foreign DNA or RNA sequences, called `spacers' into its CRISPR system.
arxiv   +1 more source

Overcoming Extreme Ammonia Inhibition on Methanogenesis by Artificially Constructing a Synergistically Community with Acidogenic Bacteria and Hydrogenotrophic Archaea

open access: yesAdvanced Science, EarlyView.
This study proposes a two‐step biological strategy to synergistically enhance the three stages of anaerobic digestion, ultimately eliminating the extreme ammonia inhibition and breaking through the inefficiency bottleneck of conventional biotechnology.
Heng Wu   +6 more
wiley   +1 more source

Fungi stabilize multi‐kingdom community in a high elevation timberline ecosystem

open access: yesiMeta, Volume 1, Issue 4, December 2022., 2022
Multi‐kingdom network construction increased network complexity. Multi‐kingdom network construction increased negative edge proportion. Fungi stabilized multi‐kingdom network structure. Fungi linked above‐ and below‐ground biota at the community level.
Teng Yang   +6 more
wiley   +1 more source

Candidatus Nitrosocaldus cavascurensis, an Ammonia Oxidizing, Extremely Thermophilic Archaeon with a Highly Mobile Genome

open access: yesFrontiers in Microbiology, 2018
Ammonia oxidizing archaea (AOA) of the phylum Thaumarchaeota are widespread in moderate environments but their occurrence and activity has also been demonstrated in hot springs. Here we present the first enrichment of a thermophilic representative with a
Sophie S. Abby   +8 more
doaj   +1 more source

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