Results 81 to 90 of about 1,586,071 (235)

Structure and assembly of archaeal viruses

, 2020
International audienceViruses of archaea represent one of the most enigmatic parts of the virosphere. Most of the characterized archaeal viruses infect extremophilic hosts and display remarkable diversity of virion morphotypes, many of which have never ...
Egelman, Edward, Diana P. Baquero, Liu, Ying, Fengbin Wang, Wang, Fengbin, Mart Krupovic, David Prangishvili, Ying Liu, Edward H. Egelman, Krupovic, Mart, Baquero, Diana, Prangishvili, David   +11 more
core   +1 more source

DNA interference and beyond: structure and functions of prokaryotic Argonaute proteins

Nature Communications, 2018
In this review, Aravin and colleagues examine bacterial and archaeal Argonaute proteins, discuss their diverse architectures and their possible roles in host defense, proposing additional functions for Argonaute proteins in prokaryotic cells.
Lidiya Lisitskaya, Alexei A. Aravin, Andrey Kulbachinskiy   +2 more
doaj   +1 more source

An (αβ)2 Architecture of the Arabidopsis thaliana tRNA Splicing Endonuclease Complex: Structural Modeling and Evolutionary Analyses

Proteins: Structure, Function, and Bioinformatics, EarlyView.
ABSTRACT The tRNA splicing endonuclease (TSEN) removes introns from precursor tRNAs (pre‐tRNAs) in eukaryotes and archaea, but the architecture and subunit organization of plant TSEN remain poorly defined. Here, we integrated in planta bimolecular fluorescence complementation (BiFC) assays with AlphaFold3 (AF3)‐based structural modeling, molecular ...
Mohammad Moniruzzaman, Markus Englert, Kazuhito Akama   +2 more
wiley   +1 more source

Archaeal Unfoldase Counteracts Protein Misfolding Retinopathy in Mice [PDF]

The Journal of Neuroscience, 2018
Deregulation of cellular proteostasis due to the failure of the ubiquitin proteasome system to dispose of misfolded aggregation-prone proteins is a hallmark of various neurodegenerative diseases in humans. Microorganisms have evolved to survive massive protein misfolding and aggregation triggered by heat shock using their protein-unfolding ATPases ...
Celine Brooks, Aaron Snoberger, Marycharmain Belcastro, Joseph Murphy, Oleg G. Kisselev, David M. Smith, Maxim Sokolov   +6 more
openaire   +2 more sources

Seasonal Dynamics of Community and Function of Gut Microbiome in Taihangshan Macaque (Macaca mulatta tcheliensis): Inferred From Metagenomic Data

Integrative Zoology, EarlyView.
A total of 435 non‐redundant metagenome‐assembled genomes (MAGs) were obtained from fecal samples of Taihangshan macaque across all four seasons. The alpha diversity of the gut microbiome in spring and winter was significantly higher than in summer and autumn. Furthermore, marked differences were detected in functional pathways and carbohydrate enzymes
Yanyan Zhou, Qi Shao, Chunbo Liu, Jundong Tian, Xiaowen Guan, Xi Zhang, Jiqi Lu   +6 more
wiley   +1 more source

S‐Adenosylmethionine (SAM) hydrolases counter increased SAM epimerisation in thermophilic archaea

The FEBS Journal, EarlyView.
S‐Adenosyl‐l‐methionine (SAM) is a vital enzyme cofactor. Epimerisation at the sulfonium centre of biologically active (SS,SCα)‐SAM is driven by heat, yielding biologically inactive (RS,SCα)‐SAM. Here, two novel archaeal SAM hydrolases from the thermophilic Sulfolobus acidocaldarius and the halophilic Haloferax volcanii are shown to cleave (RS,SCα)‐SAM.
Agnes Bartels, Michael K. F. Mohr, Phillip Nußbaum, Marie Joest, Bianca Wassmer, Laurent Rasquin, Sonja‐Verena Albers, Jennifer N. Andexer   +7 more
wiley   +1 more source

Characterisation of XPD from Sulfolobus acidocaldarius : an iron-sulphur cluster containing DNA repair helicase [PDF]

, 2007
DNA is constantly damaged by a variety of exogenous and endogenous sources. To maintain the integrity of the genome, different DNA repair mechanisms have evolved, which deal with different kinds of DNA damage.
Rudolf, Jana
core   +2 more sources

Cytochromes c in Archaea: distribution, maturation, cell architecture and the special case of Ignicoccus hospitalis

Frontiers in Microbiology, 2015
Cytochromes c (Cytc) are widespread electron transfer proteins and important enzymes in the global nitrogen and sulfur cycles. The distribution of Cytc in more than 300 archaeal proteomes deduced from sequence was analyzed with computational methods ...
Arnulf eKletzin, Thomas eHeimerl, Thomas eHeimerl, Jennifer eFlechsler, Laura eVan Niftrik, Reinhard eRachel, Andreas eKlingl   +6 more
doaj   +1 more source

A distinct gene expression mechanism for d‐amino acid utilization in hyperthermophilic archaeon Pyrococcus horikoshii

The FEBS Journal, EarlyView.
The genes PH0137, PH0138, and PH0140 form a cluster in the genome of Pyrococcus horikoshii. The PH0140 gene encodes a transcription factor identified as a d‐amino acid‐responsive regulatory protein (DARP). In feast mode, l‐Ile‐bound DARP binds to the promoter and represses transcription of PH0137 and PH0138. In famine mode, DARP binds to d‐allo‐Ile and
Ryushi Kawakami, Tomoki Kawase, Taira Uehara, Haruhiko Sakuraba, Tomohiko Matsuzawa, Junji Hayashi, Toshihisa Ohshima   +6 more
wiley   +1 more source

Protein phosphorylation and its role in archaeal signal transduction [PDF]

FEMS Microbiology Reviews, 2016
Reversible protein phosphorylation is the main mechanism of signal transduction that enables cells to rapidly respond to environmental changes by controlling the functional properties of proteins in response to external stimuli. However, whereas signal transduction is well studied in Eukaryotes and Bacteria, the knowledge in Archaea is still rather ...
Esser, Dominik, Hoffmann, Lena, Pham, Trong Khoa, Bräsen, Christopher, Qiu, Wen, Wright, Phillip C., Albers, Sonja Verena, Siebers, Bettina   +7 more
openaire   +6 more sources