Results 71 to 80 of about 1,634 (145)

Intracanal microbiome profiles of two apical periodontitis cases in one patient: A comparison with saliva and plaque profiles

Clinical and Experimental Dental Research, Volume 10, Issue 2, April 2024.
Abstract Objectives To determine the characteristics of the endodontic microbiome. Material and Methods Saliva, plaque, and infected root canal wall dentin of two teeth suffering from apical periodontitis were harvested from a 58‐year‐old man. Bacterial DNA was extracted from each sample, and 16S rRNA gene analysis targeting the V3–V4 region was ...
Keiko Yamaki, Toru Tamahara, Jumpei Washio, Takuichi Sato, Ritsuko Shimizu, Satoru Yamada   +5 more
wiley   +1 more source

Recent functional insights into the role of (p)ppGpp in bacterial physiology

, 2015
The alarmones guanosine tetraphosphate and guanosine pentaphosphate (collectively referred to as (p)ppGpp) are involved in regulating growth and several different stress responses in bacteria.
Tenson, Tanel, Atkinson, Gemma C.,, Atkinson, Gemma C., Gerdes, Kenn, Hauryliuk, Vasili,, Tenson, Tanel,, Murakami, Katsuhiko S.,, Gerdes, Kenn,, Murakami, Katsuhiko S., Hauryliuk, Vasili   +9 more
core   +1 more source

Accumulation of guanosine tetraphosphate induced by polymixin and gramicidin in Escherichia coli.

, 1983
International audienceThe effects of two polypeptide antibiotics, polymixin B and gramicidin S, on the intracellular pool size and turnover of guanosine tetraphosphate (ppGpp) were analyzed in stringent (relA+) and relaxed (relA) strains of Escherichia ...
Cortay, Jc, Cozzone, Aj
core   +1 more source

A ppGpp-mediated brake on photosynthesis is required for acclimation to nitrogen limitation in Arabidopsis

, 2021
Guanosine pentaphosphate and tetraphosphate (together referred to as ppGpp) are hyperphosphorylated nucleotides found in bacteria and the chloroplasts of plants and algae.
Michel Havaux, Romand, Shanna, Field, Benjamin, Shanna Romand, Citerne, Sylvie, Hatem Fakhfakh, Fakhfakh, Hatem, d'Alessandro, Stefano, Mohamed Belaroussi, Belaroussi, Mohamed, Dussenne, Melanie, Caffarri, Stefano, Cécile Lecampion, Brigitte Ksas, Hela Abdelkefi, Field, Ben, Stefano D'Alessandro, Sylvie Citerne, Havaux, Michel, Caius, José, Ben Field, Stefano Caffarri, Melanie Dussenne, Ksas, Brigitte, Lecampion, Cecile, Jose Caius, Abdelkefi, Hela   +26 more
core   +1 more source

T7 phage factor required for managing RpoS in Escherichia coli [PDF]

, 2018
T7 development in Escherichia coli requires the inhibition of the housekeeping form of the bacterial RNA polymerase (RNAP), Eσ70, by two T7 proteins: Gp2 and Gp5.7.
Wigneshweraraj, S, Qimron, Udi, Aline Tabib-Salazar, Lynn Burchell, Matthews, Steve, Steve J. Matthews, Burchell, Lynn, Liu, Bing, Bing Liu, Udi Qimron, Declan, Barker, Sivaramesh Wigneshweraraj, Tabib-Salazar, Aline, Declan Barker   +13 more
core   +1 more source

Biochemical characterization of Gppa-ppx homologues from Mycobacterium tuberculosis

, 2011
Inorganic polyphosphate (poly-P), guanosine pentaphosphate (pppGpp) and guanosine tetraphosphate (ppGpp) are present within all bacterial cells. These molecules play a variety of important physiological roles; especially regarding stress resistance ...
Choi, MY, Wang, Y, Watt, RM, Wong, LY, Chen, W, Tanner, JA   +5 more
core  

Arabidopsis RelA/SpoT homologs implicate (p)ppGpp in plant signaling

, 2000
Arabidopsis RPP5 is a member of a large class of pathogen resistance genes encoding nucleotide-binding sites and leucine-rich repeat domains. Yeast two-hybrid analysis showed that RPP5 specifically interacts with At-RSH1, an Arabidopsis RelA/SpoT homolog.
Bibb, Mervyn J., Jones, Jonathan D. G., van der Biezen, Erik A., Sun, Jongho, Coleman, Mark J.   +4 more
core   +1 more source

Hit the right spots:Cell cycle control by phosphorylated guanosines in alphaproteobacteria

, 2017
The class Alphaproteobacteria includes Gram-negative free-living, symbiotic and obligate intracellular bacteria, as well as important plant, animal and human pathogens. Recent work has established the key antagonistic roles that phosphorylated guanosines,
Viollier, Patrick, Hallez, Régis, Delaby, Marie, Sanselicio, Stefano, Viollier, Patrick H.   +4 more
core   +1 more source

The Multiple Signaling Systems Regulating Virulence in Pseudomonas aeruginosa [PDF]

, 2012
Cell-to-cell communication is a major process that allows bacteria to sense and coordinately react to the fluctuating conditions of the surrounding environment.
Thompson, Jessica A., Cool, Robbert H., Xavier, Karina B., Quax, Wim J., Jimenez, Pol Nadal, Quax, Wim J.; id_orcid, Koch, Gudrun   +6 more
core   +1 more source

Differential binding of ppGpp and pppGpp to E-coli RNA polymerase: photo-labeling and mass spectral studies

, 2015
(p) ppGpp, a secondary messenger, is induced under stress and shows pleiotropic response. It binds to RNA polymerase and regulates transcription in Escherichia coli.
Syal, Kirtimaan, Chatterji, Dipankar
core   +1 more source