نتایج جستجو برای: encoding operons

تعداد نتایج: 125313  

2015
Hildegunn Iversen Toril Lindbäck Trine M. L’Abée-Lund Norbert Roos Marina Aspholm Lotte Stenfors Arnesen

Enterohemorrhagic E. coli (EHEC) is associated with severe gastrointestinal disease. Upon entering the gastrointestinal tract, EHEC is exposed to a fluctuating environment and a myriad of other bacterial species. To establish an infection, EHEC strains have to modulate their gene expression according to the GI tract environment. In order to explore the interspecies interactions between EHEC and...

Journal: :Biospektrum 2021

Abstract VAAM-Forschungspreis 2021 Bacterial retrons are operons containing reverse transcriptases. Despite three decades of research, their physiological role remained mysterious. Recently, have been uncovered as a widespread novel class antiphage defense systems. We here discuss how high-throughput genetics enabled this discovery, illustrating the power such approaches to illuminate function ...

Journal: :Journal of bacteriology 2006
Soon-Yong Choi Dindo Reyes Montira Leelakriangsak Peter Zuber

Spx is a global transcriptional regulator of the oxidative stress response in Bacillus subtilis. Its target is RNA polymerase, where it contacts the alpha subunit C-terminal domain. Recently, evidence was presented that Spx participates in sulfate-dependent control of organosulfur utilization operons, including the ytmI, yxeI, ssu, and yrrT operons. The yrrT operon includes the genes that funct...

Journal: :Journal of clinical microbiology 2003
Kari S Gobius Glen M Higgs Patricia M Desmarchelier

Stx2d is a recently described Shiga toxin whose cytotoxicity is activated 10- to 1000-fold by the elastase present in mouse or human intestinal mucus. We examined Shiga toxigenic Escherichia coli (STEC) strains isolated from food and livestock sources for the presence of activatable stx(2d). The stx(2) operons of STEC were first analyzed by PCR-restriction fragment length polymorphism (RFLP) an...

Journal: :Applied and environmental microbiology 2004
Lothar Feustel Stephan Nakotte Peter Dürre

The use of lacZ from Thermoanaerobacterium thermosulfurigenes (encoding beta-galactosidase) and lucB from Photinus pyralis (encoding luciferase) as reporter genes in Clostridium acetobutylicum was analyzed with promoters of genes required for solventogenesis and acidogenesis. Both systems proved to be well suited and allowed the detection of differences in promoter strength at least up to 100-f...

Journal: :Applied and environmental microbiology 2002
R Tracy Ellis Brian A Stockhoff Lisa Stamp H Ernest Schnepf George E Schwab Mark Knuth Josh Russell Guy A Cardineau Kenneth E Narva

A new family of insecticidal crystal proteins was discovered by screening sporulated Bacillus thuringiensis cultures for oral activity against western corn rootworm (WCR) larvae. B. thuringiensis isolates PS80JJ1, PS149B1, and PS167H2 have WCR insecticidal activity attributable to parasporal inclusion bodies containing proteins with molecular masses of ca. 14 and 44 kDa. The genes encoding thes...

Journal: :Journal of bacteriology 1999
C M Gifford S S Wallace

Escherichia coli formamidopyrimidine (Fpg) DNA glycosylase and MutY DNA glycosylase are base excision repair proteins that work together to protect cells from the mutagenic effects of the commonly oxidized guanine product 7,8-dihydro-8-oxoguanine. The genes encoding these proteins, fpg and mutY, are both cotranscribed as part of complex operons. fpg is the terminal gene in an operon with the ge...

Journal: :Journal of bacteriology 1991
G Jagura-Burdzy J P Ibbotson C M Thomas

Broad-host-range IncP plasmid RK2 possesses a series of operons involved in plasmid maintenance, whose expression is coordinated by a number of regulators, most of which are encoded in the central regulatory korA-korB operon. The nucleotide sequence of two new cistrons in this operon, comprising what we have previously designated the korF locus located between coordinates 57.0 and 56.0 kb on th...

2014
NEELAM SINGH

Arsenic resistance in bacteria is basically due to a detoxification system encoded by the ars operon. It has been reported in various grams negative as well as gram positive genera. The E. coli chromosomal ars operon and E. coli plasmid R773 borne ars operons were the first ones to be discovered. The ars operon Staphylococcus aureus plasmid pI 258 which shows only 30% structural homology with t...

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