Results 81 to 90 of about 4,728,729 (346)

Structural snapshots of Xer recombination reveal activation by synaptic complex remodeling and DNA bending [PDF]

, 2016
Bacterial Xer site-specific recombinases play an essential genome maintenance role by unlinking chromosome multimers, but their mechanism of action has remained structurally uncharacterized. Here, we present two high-resolution structures of Helicobacter
Adams, Afonine, Aihara, Arnold, Aussel, Barre, Barre, Biswas, Blakely, Blakely, Blakely, Britton, Carnoy, Chen, Cortez, Das, Debowski, Debowski, Diagne, Dong, Emsley, Ennifar, Fischer, Gopaul, Gopaul, Grainge, Grindley, Guo, Guo, Hendricks, Holliday, Jayaram, Jo, Kabsch, Karaca, Keller, Kelley, Kim, Krissinel, Kuempel, Le Bourgeois, Lee, Leroux, Li, Luscombe, May, McCoy, Midonet, Nagy, Nolivos, Nunes-Düby, Page, Pargellis, Pettersen, Pérals, Rother, Serre, Steiner, Subramanya, Terwilliger, Turan, Val, Van Duyne, Van Duyne, van Zundert, Vonrhein, Yang, Yang, Yates, Yates, Zawadzki, Zheng   +71 more
core   +4 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Transferrin-polycation conjugates as carriers for DNA uptake into cells. [PDF]

, 1990
We have developed a high-efficiency nucleic acid delivery system that uses receptor-mediated endocytosis to carry DNA macromolecules into cells. We accomplished this by conjugating the iron-transport protein transferrin to polycations that bind nucleic ...
Beug, Hartmut, Birnstiel, Max L., Cotten, Matt, Wagner, Ernst, Zenke, Martin   +4 more
core   +1 more source

Control of bacterial DNA supercoiling [PDF]

Molecular Microbiology, 1992
SummaryTwo DNA topoisomerases control the level of negative supercoiling in bacterial cells. DNA gyrase introduces supercoils, and DNA topoisomerase I prevents super‐coiling from reaching unacceptably high levels. Perturbations of supercoiling are corrected by the substrate preferences of these topoisomerases with respect to DNA topology and by changes
openaire   +2 more sources

Bacterial DNA Extraction Using Individual Enzymes and Phenol/Chloroform Separation†

Journal of Microbiology & Biology Education, 2017
Marmur (4) developed one of the first detailed comprehensive methods for purifying bacterial DNA. This procedure is now outdated, and can be difficult to follow for those with limited experience in molecular biology.
M. H. Wright, Joseph Adelskov, A. Greene
semanticscholar   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Hanks-Type Serine/Threonine Protein Kinases and Phosphatases in Bacteria: Roles in Signaling and Adaptation to Various Environments [PDF]

, 2018
Reversible phosphorylation is a key mechanism that regulates many cellular processes in prokaryotes and eukaryotes. In prokaryotes, signal transduction includes two-component signaling systems, which involve a membrane sensor histidine kinase and a ...
Janczarek, Monika, Karaś, Magdalena, Lipa, Paulina, Vinardell González, José María   +3 more
core   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Inherent bacterial DNA contamination of extraction and sequencing reagents may affect interpretation of microbiota in low bacterial biomass samples

Gut Pathogens, 2016
BackgroundThe advent and use of highly sensitive molecular biology techniques to explore the microbiota and microbiome in environmental and tissue samples have detected the presence of contaminating microbial DNA within reagents.
Angela Glassing, S. Dowd, S. Galandiuk, B. Davis, R. Chiodini   +4 more
semanticscholar   +1 more source

TRAIL‐PEG‐Apt‐PLGA nanosystem as an aptamer‐targeted drug delivery system potential for triple‐negative breast cancer therapy using in vivo mouse model

Molecular Oncology, EarlyView.
Aptamers are used both therapeutically and as targeting agents in cancer treatment. We developed an aptamer‐targeted PLGA–TRAIL nanosystem that exhibited superior therapeutic efficacy in NOD/SCID breast cancer models. This nanosystem represents a novel biotechnological drug candidate for suppressing resistance development in breast cancer.
Gulen Melike Demirbolat, Aslihan Kucuk, Omer Erdogan, Samed Ozer, Bensu Kozan, Tugba Cuceli, Erkan Gumus, Evrim Cevik, Ozge Cevik   +8 more
wiley   +1 more source