Results 21 to 30 of about 1,167,503 (297)

Assignment of sigma factors of RNA polymerase to promoters in Corynebacterium glutamicum

AMB Express, 2017
Corynebacterium glutamicum is an important industrial producer of various amino acids and other metabolites. The C. glutamicum genome encodes seven sigma subunits (factors) of RNA polymerase: the primary sigma factor SigA (σA), the primary-like σB and ...
Hana Dostálová, Jiří Holátko, Tobias Busche, Lenka Rucká, Andrey Rapoport, Petr Halada, Jan Nešvera, Jörn Kalinowski, Miroslav Pátek   +8 more
doaj   +1 more source

Recognition of Streptococcal Promoters by the Pneumococcal SigA Protein

Frontiers in Molecular Biosciences, 2021
Promoter recognition by RNA polymerase is a key step in the regulation of gene expression. The bacterial RNA polymerase core enzyme is a complex of five subunits that interacts transitory with one of a set of sigma factors forming the RNA polymerase ...
Virtu Solano-Collado, Sofía Ruiz-Cruz, Fabián Lorenzo-Díaz, Radoslaw Pluta, Manuel Espinosa, Alicia Bravo   +5 more
doaj   +1 more source

Comparative analyses imply that the enigmatic Sigma factor 54 is a central controller of the bacterial exterior. [PDF]

, 2011
Contains fulltext : 95738.pdf (Publisher’s version ) (Open Access)BACKGROUND: Sigma-54 is a central regulator in many pathogenic bacteria and has been linked to a multitude of cellular processes like nitrogen assimilation and important ...
Roland J Siezen, Overmars, L., Moezelaar, R., Groot Kormelink Tom, Hagemeijer, Y., Sluijter Vincent, Siezen Roland J, Tom Groot Kormelink, Sluijter, V., Yanick Hagemeijer, Lex Overmars, Vincent Sluijter, Francke, C., Francke Christof, Hagemeijer Yanick, Overmars Lex, Christof Francke, Moezelaar Roy, Groot Kormelink, T., Roy Moezelaar, Siezen, R.J.   +20 more
core   +1 more source

Two enhancer binding proteins activate σ54-dependent transcription of a quorum regulatory RNA in a bacterial symbiont

eLife, 2023
To colonize a host, bacteria depend on an ensemble of signaling systems to convert information about the various environments encountered within the host into specific cellular activities.
Ericka D Surrett, Kirsten R Guckes, Shyan Cousins, Terry B Ruskoski, Andrew G Cecere, Denise A Ludvik, C Denise Okafor, Mark J Mandel, Tim I Miyashiro   +8 more
doaj   +1 more source

Definition of the σW regulon of Bacillus subtilis in the absence of stress [PDF]

, 2012
Bacteria employ extracytoplasmic function (ECF) sigma factors for their responses to environmental stresses. Despite intensive research, the molecular dissection of ECF sigma factor regulons has remained a major challenge due to overlaps in the ECF sigma
Jessica C Zweers, Nicolas Pierre, Nicolas, Pierre, van Dijl Jan Maarten, Nicolas, Pierre, P., Pierre Nicolas (1549), Zweers, Jessica C., Emma L. Denham (121430), Jan Maarten van Dijl, Jan Maarten van Dijl (90770), Dijl, Jan Maarten van, Thomas Wiegert (121429), Wiegert, Thomas, Denham, Emma, Zweers Jessica C., Wiegert Thomas, Jessica C. Zweers (121427), Denham, Emma L., van Dijl, Jan Maarten, Emma L Denham, Maarten van Dijl, Jan, Denham Emma L., Pierre Nicolas, Thomas Wiegert   +23 more
core   +1 more source

Structural insights into the regulation of SigB activity by RsbV and RsbW

IUCrJ, 2020
Bacillus subtilis SigB is an alternative sigma factor that initiates the transcription of stress-responsive genes. The anti-sigma factor RsbW tightly binds SigB to suppress its activity under normal growth conditions and releases it when ...
Deepak Pathak, Kyeong Sik Jin, Sudarshan Tandukar, Jun Ha Kim, Eunju Kwon, Dong Young Kim   +5 more
doaj   +1 more source

Study on grid inefficiency for mesh-type Frisch-grid ionization chambers

European Physical Journal C: Particles and Fields, 2022
In this study, the grid inefficiency $$\sigma $$ σ for a mesh-type Frisch-grid ionization chamber (FGIC) was investigated using the finite element method and Monte Carlo method.
Changqi Liu, Hang Zhang, Xiaohou Bai, Jianjin Zhou, Pengqi Zhang, E. Dejun, Jinqiu Peng, Zhanwen Ma, Xiaolong Lu, Yu Zhang, Zeen Yao, Junrun Wang, Zheng Wei   +12 more
doaj   +1 more source

Architecture, Dynamics, and Function of the General Stress Response System in B. subtilis [PDF]

, 2012
Cells exhibit diverse and dynamic responses to stress. However, in many cases it remains unclear what the dynamics are, how they are generated, and why they are beneficial to the cell or organism. To investigate these issues we studied the General Stress
Young, Jonathan Wan
core   +1 more source

Sigma factor-anti-sigma factor interaction in alginate synthesis: inhibition of AlgT by MucA [PDF]

Journal of Bacteriology, 1996
Conversion from the nonmucoid to the mucoid phenotype is a typical feature of Pseudomonas aeruginosa strains causing chronic pulmonary infections in cystic fibrosis patients. One of the key genetic controls in this conversion to mucoidy is from the algT(U)-mucA-mucB(algN) locus, located at 67.5 min on the standard P. aeruginosa chromosomal map.
Z D, Xie, C D, Hershberger, S, Shankar, R W, Ye, A M, Chakrabarty   +4 more
openaire   +2 more sources

An RpaA-Dependent Sigma Factor Cascade Sets the Timing of Circadian Transcriptional Rhythms in Synechococcus elongatus

Cell Reports, 2018
Summary: The circadian clock of the cyanobacterium Synechococcus elongatus PCC 7942 drives oscillations in global mRNA abundances with 24-hr periodicity under constant light conditions. The circadian clock-regulated transcription factor RpaA controls the
Kathleen E. Fleming, Erin K. O’Shea
doaj   +1 more source