Results 91 to 100 of about 114,759 (195)

Effects of Algae β‐Glucan Supplementation on the Performance and Intestinal Immune System of Healthy Weaned Piglets

Journal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT While β‐glucans from plants and yeasts have been extensively studied in weaned piglets, studies examining algae β‐glucans are scarce. Thus, the present study aimed to examine the effects of feeding algae β‐glucan in weaned piglets. Male, 21‐day‐old, weaned crossbred piglets were allotted to three experimental groups, which were fed either an ...
Johanna O. Buckenberger, Felizitas Gutöhrlein, Manfred Henrich, Erika Most, Rose Whelan, John K. Htoo, Robert Ringseis, Klaus Eder   +7 more
wiley   +1 more source

A Single‐Nucleotide Substitution Generates a de Novo Promoter That Activates a Latent Metabolic Bypass in Escherichia coli

Molecular Microbiology, EarlyView.
A chromosomal mutation allows bypass of deletion of the Escherichia coli fabH gene. The bypass results from creation of a new promoter that drives increased madA transcription, resulting in increased synthesis of acetyl‐acyl carrier protein by decarboxylation of malonyl‐acyl carrier protein.
Qiaoqiao Guo, Qi Zou, Jilong Qin, Makrina Totsika, Yaoqin Hong, John E. Cronan   +5 more
wiley   +1 more source

A Nutrient‐Responsive LuxR Regulator Orchestrates Effector Gene Expression Across the Legionella Genus

Molecular Microbiology, EarlyView.
LexR1 is a LuxR‐type regulator that links nutrient sensing to effector gene expression in Legionella. Activated by a casamino acid‐derived ligand, LexR1 directly controls multiple effector genes using a conserved regulatory element present in numerous putative effectors across different Legionella species.
Chen Adler, Gil Segal
wiley   +1 more source

The Role of torS and torT Transcription in Driving a Bet‐Hedging Strategy for Trimethylamine N‐Oxide Reductase Expression in Escherichia coli

Molecular Microbiology, EarlyView.
Low basal activity of divergent promoters driving transcription of the trimethylamine N‐oxide (TMAO) sensor TorT and kinase TorS is integral to an O2‐regulated bet‐hedging strategy for continued E. coli growth upon the onset of anaerobiosis. This, along with repression by IscR, promotes noise in the TorS to TorT ratio, which is critical for adaptation ...
Erin L. Mettert, Jeffrey N. Carey, Wilma Ross, Mark Goulian, Patricia J. Kiley   +4 more
wiley   +1 more source

A Spontaneous Mutation in tfoX Impairs Bioluminescence in Photobacterium kishitanii ANT‐2200

Molecular Microbiology, EarlyView.
A frameshift mutation in tfoX generates a truncated regulator associated with reduced lux–rib expression and low luminescence. Complementation with wild‐type tfoX restores transcription and light production, supporting a role for TfoX in regulating bioluminescence independently of quorum sensing.
Capucine Le Cam Ligier, Gwenola Simon, Charlotte Berthelier, Corinne Valette, Elisa Lefeuvre, Marc Garel, Laurie Casalot   +6 more
wiley   +1 more source

The 3D genome of Gigaspora margarita unveils stable chromatin and nucleolar organization and symbiont‐dependent genome dynamics

New Phytologist, EarlyView.
Summary Arbuscular mycorrhizal fungi (AMF) are widespread plant symbionts that enhance nutrient acquisition and influence ecosystem productivity. Previous chromosome‐level assemblies of the model species Rhizophagus irregularis revealed a two‐compartment genome architecture (active A and repressed B chromatin compartments), yet its conservation across ...
Ken Mugambi, Jordana Oliveira, Franco Magurno, Alessandra Salvioli di Fossalunga, Mara Novero, Luisa Lanfranco, Stefano Ghignone, Gökalp Yildirir, Yan Wang, Paola Bonfante, Nicolas Corradi   +10 more
wiley   +1 more source

rRNA operon improves species-level classification of bacteria and microbial community analysis compared to 16S rRNA

Microbiology Spectrum
Precise identification of species is fundamental in microbial genomics and is crucial for understanding the microbial communities. While the 16S rRNA gene, particularly its V3-V4 regions, has been extensively employed for microbial identification ...
Sohyoung Won, Seoae Cho, Heebal Kim
doaj   +1 more source

Metagenomic Evaluation of Oral Microbiota in Patients Affected by Oral Lichen Planus: A Pilot Study

Oral Diseases, EarlyView.
ABSTRACT Objective To characterize the oral bacterial and fungal microbiota of symptomatic oral lichen planus patients undergoing topical corticosteroid therapy and to explore microbial patterns potentially associated with subsequent oral candidiasis. Methods Twelve patients with clinically and histologically confirmed OLP were enrolled.
A. Dormiente, L. Mancabelli, M. Ventura, G. Longhi, G. Mergoni, M. Manfredi   +5 more
wiley   +1 more source

The ComEA/ComEC Operon is Critical for Nitrosative Stress Tolerance by an Oral Commensal

Molecular Oral Microbiology, EarlyView.
ABSTRACT Oral commensal streptococci play a large role in mediating microbial homeostasis. Our prior work has demonstrated that hydrogen peroxide (H2O2) produced by oral commensal streptococci can react with salivary nitrite (NO2) and generate peroxynitrite (ONOO−), a potent antimicrobial.
Sara E. Edmonds, Hernan Grenett, Priscilla Grenett, Jessica A. Scoffield   +3 more
wiley   +1 more source

FucR Functions as a Transcriptional Regulator for L-Fucose Utilization in Campylobacter jejuni

Microorganisms
Campylobacter jejuni is an enteric pathogen and a major cause of foodborne illness worldwide. It has been shown that C. jejuni primarily utilizes amino acids as its preferred energy source, but its ability to utilize L-fucose can grant a competitive ...
Wayne T. Muraoka, Nicholas Lizer, Peng Liu, Zhangqi Shen, Qingqing Xia, Muslum Ilgu, Qijing Zhang   +6 more
doaj   +1 more source