Results 101 to 110 of about 9,001,251 (226)

The structures of two archaeal type IV pili illuminate evolutionary relationships

Nature Communications, 2020
We have determined the cryo-electron microscopic (cryo-EM) structures of two archaeal type IV pili (T4P), from Pyrobaculum arsenaticum and Saccharolobus solfataricus, at 3.8 Å and 3.4 Å resolution, respectively. This triples the number of high resolution
Feng-Bin Wang, D. Baquero, Zhangli Su, L. Beltrán, D. Prangishvili, M. Krupovic, E. Egelman   +6 more
semanticscholar   +1 more source

The Hare and the Tortoise in Ecological L2 Learning: Distributed Practice Effects in Vocabulary and Grammar

TESOL Quarterly, EarlyView.
Abstract Research on the distributed practice effect, that is the impact of different intervals between learning sessions, has investigated both intentional and incidental learning of second language vocabulary and grammar targets. This research is complex and has produced conflicting findings: whereas robust effects have been shown for intentional ...
Shona Whyte, Katerina Palasis, Amanda Edmonds, Emilie Gerbier   +3 more
wiley   +1 more source

Corporate Governance Pillars and ESG Disclosure: A Systematic Literature Review Piliers de la gouvernance d'entreprise et divulgation ESG : revue systématique de la littérature

Accounting Perspectives, EarlyView.
ABSTRACT Environmental, social, and governance (ESG) disclosure is attracting the attention of standard setters, regulatory bodies, academics, and practitioners. This interest stems from the evolution of ESG disclosure standards—notably, the new sustainability standards developed by the International Sustainability Standards Board.
Salma Charifa Kartout, Hanen Khemakhem
wiley   +1 more source

Attenuation of Type IV pili activity by natural products

Journal of Biomolecular Structure and Dynamics
The virulence factor Type IV pili (T4P) are surface appendages used by the opportunistic pathogen Pseudomonas aeruginosa for twitching motility and adhesion in the environment and during infection. Additionally, the use of these appendages by P. aeruginosa for biofilm formation increases its virulence and drug resistance.
Yalkut, Kerem, Ben Ali Hassine, Soumaya, Basaran, Esra, Kula, Ceyda, Ozcan, Aslıhan, Avci, Fatma Gizem, Keskin, Ozlem, Sariyar Akbulut, Berna, Ozbek, Pemra   +8 more
openaire   +3 more sources

Structure of the Neisseria meningitidis Type IV pilus

Nature Communications, 2016
Type IV pili are present on a wide range of bacterial pathogens and mediate diverse functions. Here the authors report a high resolution crystal structure of the pilin subunit PilE, and a cryoEM reconstruction of the Type IV pilus filament from N ...
Subramania Kolappan, Mathieu Coureuil, Xiong Yu, Xavier Nassif, Edward H. Egelman, Lisa Craig   +5 more
doaj   +1 more source

Hair Degradation Patterns in Aquatic and Soil Environments

Archaeometry, EarlyView.
ABSTRACT Hair is a biological material that can provide information in archaeology and forensics. Previous studies have mainly examined changes occurring post‐mortem. In this study, we focused on hair pulled out ante‐mortem. The aim of the study was to identify patterns in the degradation of hair in water and soil.
Katarzyna Palacz‐Ziółek, Monika Krzyżanowska, Rafał Ogórek, Marcin Kadej   +3 more
wiley   +1 more source

The Keystone‐Pathogen Hypothesis Updated: The Role of Porphyromonas gingivalis in Periodontitis

Journal of Periodontal Research, EarlyView.
Porphyromonas gingivalis orchestrates a coordinated manipulation of immune and inflammatory responses in periodontal tissues which leads to the generation of a dysbiotic, subgingival biofilm community, and progression of periodontitis. The type 9 secretion system, lipid A modification, and the formation of outer membrane vesicles are important ...
Mike A. Curtis, James A. Garnett, Richard P. Darveau   +2 more
wiley   +1 more source

Structural and Evolutionary Analyses Show Unique Stabilization Strategies in the Type IV Pili of Clostridium difficile [PDF]

, 2016
SummaryType IV pili are produced by many pathogenic Gram-negative bacteria and are important for processes as diverse as twitching motility, biofilm formation, cellular adhesion, and horizontal gene transfer.
Rosenvinge, Erik von, Sundberg, Eric J, Lee, Amanda, Maldarelli, Grace A, Mulvey, George L, Piepenbrink, Kurt H, Donnenberg, Michael S, Dingle, Tanis C, Martinez de la Pena, Claudia F, Armstrong, Glen D   +9 more
core  

Periodontal Salutogenesis: Why Are Some People Resistant to Oral Microbial Dysbiosis and Destructive Inflammation?

Journal of Periodontal Research, EarlyView.
Emerging evidence suggests that periodontal health is not simply the absence of disease, but the result of a dynamic interaction between biological resilience, healthy lifestyles, adaptive coping mechanisms, and supportive environments. This results in a strong sense of coherence, which is not only a psychological state but also a biological state ...
Bruno G. Loos, Magda Feres, William V. Giannobile, Hatice Hasturk, Egija Zaura   +4 more
wiley   +1 more source

Adhesion of Neisseria meningitidis to dermal vessels leads to local vascular damage and purpura in a humanized mouse model.

PLoS Pathogens, 2013
Septic shock caused by Neisseria meningitidis is typically rapidly evolving and often fatal despite antibiotic therapy. Further understanding of the mechanisms underlying the disease is necessary to reduce fatality rates.
Keira Melican, Paula Michea Veloso, Tiffany Martin, Patrick Bruneval, Guillaume Duménil   +4 more
doaj   +1 more source