نتایج جستجو برای: encoding operons

تعداد نتایج: 125313  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Karsten Temme Dehua Zhao Christopher A Voigt

Bacterial genes associated with a single trait are often grouped in a contiguous unit of the genome known as a gene cluster. It is difficult to genetically manipulate many gene clusters because of complex, redundant, and integrated host regulation. We have developed a systematic approach to completely specify the genetics of a gene cluster by rebuilding it from the bottom up using only syntheti...

Journal: :International journal of systematic and evolutionary microbiology 2013
Céline Villeneuve Christine Martineau Florian Mauffrey Richard Villemur

Two bacterial strains, designated JAM1(T) and JAM7(T), were isolated from a methanol-fed denitrification system treating seawater at the Montreal Biodome, Canada. They were affiliated within the genus Methylophaga of the Gammaproteobacteria by analysis of the 16S rRNA gene sequences. Strain JAM1(T) had the capacity to grow under denitrifying conditions by reducing nitrate into nitrite which is ...

Journal: :Journal of bacteriology 2004
Guillermo Gosset Zhongge Zhang Samir Nayyar William A Cuevas Milton H Saier

We report here the transcriptome analyses of highly expressed genes that are subject to catabolite repression or activation mediated by the cyclic AMP receptor protein (Crp). The results reveal that many operons encoding enzymes of central carbon metabolic pathways (e.g., Krebs cycle enzymes), as well as transporters and enzymes that initiate carbon metabolism, are subject to direct Crp-mediate...

2013
Katalin Kovács Benjamin J Willson Katrin Schwarz John T Heap Adam Jackson David N Bolam Klaus Winzer Nigel P Minton

BACKGROUND Consolidated bioprocessing (CBP) is reliant on the simultaneous enzyme production, saccharification of biomass, and fermentation of released sugars into valuable products such as butanol. Clostridial species that produce butanol are, however, unable to grow on crystalline cellulose. In contrast, those saccharolytic species that produce predominantly ethanol, such as Clostridium therm...

Journal: :Journal of bacteriology 2005
Katharina Veit Claudia Ehlers Ruth A Schmitz

The methanogenic archaeon Methanosarcina mazei strain Gö1 uses versatile carbon sources and is able to fix molecular nitrogen with methanol as carbon and energy sources. Here, we demonstrate that when growing on trimethylamine (TMA), nitrogen fixation does not occur, indicating that ammonium released during TMA degradation is sufficient to serve as a nitrogen source and represses nif gene induc...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Yinghong Lu Habib Rijzaani Daniel Karcher Stephanie Ruf Ralph Bock

The engineering of complex metabolic pathways requires the concerted expression of multiple genes. In plastids (chloroplasts) of plant cells, genes are organized in operons that are coexpressed as polycistronic transcripts and then often are processed further into monocistronic mRNAs. Here we have used the tocochromanol pathway (providing tocopherols and tocotrienols, collectively also referred...

Journal: :Briefings in functional genomics & proteomics 2004
Thomas Blumenthal

It was thought that polycistronic transcription is a characteristic of bacteria and archaea, where many of the genes are clustered in operons composed of two to more than ten genes. By contrast, the genes of eukaryotes are generally considered to be monocistronic, each with its own promoter at the 5' end and a transcription terminator at the 3' end; however, it has recently become clear that no...

ژورنال: Medical Laboratory Journal 2018
Bouzari, Majid, Ghaemi, Ezzat Allah , Yazdi, Mahsa,

ABSTRACT              Background and objectives: Urinary tract infections (UTIs) are one of the most common infectious diseases caused by bacteria. The primary etiologic agent of UTIs is Escherichia coli. Uropathogenic E.coli (UPEC) strains have a number of specific virulence factors, which can worsen UTIs. This study was performed to...

Journal: :Biophysical journal 2014
David Fange Harriet Mellenius Patrick P Dennis Måns Ehrenberg

Previous electron-microscopic imaging has shown high RNA polymerase occupation densities in the 16S and 23S encoding regions and low occupation densities in the noncoding leader, spacer, and trailer regions of the rRNA (rrn) operons in E. coli. This indicates slower transcript elongation within the coding regions and faster elongation within the noncoding regions of the operon. Inactivation of ...

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