Results 1 to 10 of about 11,228 (120)

Stabilizing Genetically Unstable Simple Sequence Repeats in the Campylobacter jejuni Genome by Multiplex Genome Editing: a Reliable Approach for Delineating Multiple Phase-Variable Genes

mBio, 2021
Hypermutable simple sequence repeats (SSRs) are major drivers of phase variation in Campylobacter jejuni. The presence of multiple SSR-mediated phase-variable genes encoding enzymes that modify surface structures, including capsular polysaccharide (CPS ...
Shouji Yamamoto, Sunao Iyoda, Makoto Ohnishi   +2 more
doaj   +1 more source

Phase variations of the summer and winter seasons in the Bohai Sea during the last four decades

Frontiers in Marine Science, 2023
In most coastal oceans, the impacts of global warming on season duration and timing of seasonal transitions remain unknown. To mirror the reality of the ongoing climate change, the summer and winter seasons are redefined using the local water temperature
Chengyi Yuan, Xiaodi Kuang, Jingbo Xu, Ruopeng Li, Chen Wang   +4 more
doaj   +1 more source

An IS-mediated, RecA-dependent, bet-hedging strategy in Burkholderia thailandensis

eLife, 2023
Adaptation to fluctuating environmental conditions is difficult to achieve. Phase variation mechanisms can overcome this difficulty by altering genomic architecture in a subset of individuals, creating a phenotypically heterogeneous population with ...
Lillian C Lowrey, Leslie A Kent, Bridgett M Rios, Angelica B Ocasio, Peggy A Cotter   +4 more
doaj   +1 more source

The Fis Nucleoid Protein Negatively Regulates the Phase Variation fimS Switch of the Type 1 Pilus Operon in Enteropathogenic Escherichia coli

Frontiers in Microbiology, 2022
In Escherichia coli the expression of type 1 pili (T1P) is determined by the site-specific inversion of the fimS ON–OFF switch located immediately upstream of major fimbrial subunit gene fimA.
Zeus Saldaña-Ahuactzi, Jorge Soria-Bustos, Verónica I. Martínez-Santos, Jorge A. Yañez-Santos, Ygnacio Martínez-Laguna, María Lilia Cedillo-Ramirez, José L. Puente, Jorge A. Girón   +7 more
doaj   +1 more source

Bacterial DNA methyltransferase: A key to the epigenetic world with lessons learned from proteobacteria

Frontiers in Microbiology, 2023
Epigenetics modulates expression levels of various important genes in both prokaryotes and eukaryotes. These epigenetic traits are heritable without any change in genetic DNA sequences. DNA methylation is a universal mechanism of epigenetic regulation in
Qun Gao, Qun Gao, Shuwei Lu, Shuwei Lu, Yuwei Wang, Longgui He, Longgui He, Mingshu Wang, Mingshu Wang, Mingshu Wang, Renyong Jia, Renyong Jia, Renyong Jia, Shun Chen, Shun Chen, Shun Chen, Dekang Zhu, Dekang Zhu, Dekang Zhu, Mafeng Liu, Mafeng Liu, Mafeng Liu, Xinxin Zhao, Xinxin Zhao, Xinxin Zhao, Qiao Yang, Qiao Yang, Qiao Yang, Ying Wu, Ying Wu, Ying Wu, Shaqiu Zhang, Shaqiu Zhang, Shaqiu Zhang, Juan Huang, Juan Huang, Juan Huang, Sai Mao, Sai Mao, Sai Mao, Xumin Ou, Xumin Ou, Xumin Ou, Di Sun, Di Sun, Di Sun, Bin Tian, Bin Tian, Bin Tian, Anchun Cheng, Anchun Cheng, Anchun Cheng   +51 more
doaj   +1 more source

Phase variation of hadronic amplitudes [PDF]

Physical Review C, 2008
The phase variation with angle of hadronic amplitudes is studied with a view to understanding the underlying physical quantities which control it and how well it can be determined in free space. We find that unitarity forces a moderately accurate determination of the phase in standard amplitude analyses but that the nucleon-nucleon analyses done to ...
Dedonder, J. P., Gibbs, W. R., Nuseirat, Mutazz   +2 more
openaire   +4 more sources

Phase and Antigenic Variation in Bacteria [PDF]

Clinical Microbiology Reviews, 2004
SUMMARYPhase and antigenic variation result in a heterogenic phenotype of a clonal bacterial population, in which individual cells either express the phase-variable protein(s) or not, or express one of multiple antigenic forms of the protein, respectively.
Marjan W, van der Woude, Andreas J, Bäumler   +1 more
openaire   +2 more sources

A Variational Model for Wrapped Phase Denoising

Mathematics, 2023
This paper presents a variational model for the denoising of wrapped phase images. By enforcing the required Pythagorean trigonometric identity between the real and imaginary components of the signal, this model improves the signal-to-noise ratio of the restored signal. To preserve phase map discontinuities, the model is based on total variation.
Ivan May-Cen, Ricardo Legarda-Saenz, Carlos Brito-Loeza   +2 more
openaire   +3 more sources

Comparative Analysis of Streptococcus pneumoniae Type I Restriction-Modification Loci: Variation in hsdS Gene Target Recognition Domains

Pathogens, 2020
Streptococcus pneumoniae (pneumococcus) is a respiratory commensal pathogen that causes a range of infections, particularly in young children and the elderly.
Melissa B. Oliver, W. Edward Swords
doaj   +1 more source

Slipped-strand mispairing within a polycytidine tract in transcriptional regulator mga leads to M protein phase variation and Mga length polymorphism in Group A Streptococcus

Frontiers in Microbiology, 2023
The M protein, a major virulence factor of Group A Streptococcus (GAS), is regulated by the multigene regulator Mga. An unexplained phenomena frequently occurring with in vitro genetic manipulation or culturing of M1T1 GAS strains is the loss of M ...
Benfang Lei, Tracey S. Hanks, Yunjuan Bao, Mengyao Liu   +3 more
doaj   +1 more source