نتایج جستجو برای: carbon catabolite repression

تعداد نتایج: 305443  

2014
Saoussen Ben Khedher Samir Jaoua Nabil Zouari

The overcoming of catabolite repression, in bioinsecticides production by sporeless Bacillus thuringiensis strain S22 was investigated into fully controlled 3 L fermenter, using glucose based medium. When applying adequate oxygen profile throughout the fermentation period (75% oxygen saturation), it was possible to partially overcome the catabolite repression, normally occurring at high initial...

Journal: :Microbiology and Molecular Biology Reviews 2003

2014
Michael A. Trembley Hunter L. Berrus Jonathan R. Whicher Emily L. Humphrey-Dixon

14-3-3 proteins are highly conserved and have been found in all eukaryotic organisms investigated. They are involved in many varied cellular processes, and interact with hundreds of other proteins. Among many other roles in cells, yeast 14-3-3 proteins have been implicated in rapamycin-mediated cell signalling. We determined the transcription profiles of bmh1 and bmh2 yeast after treatment with...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Erik M Boczko Terrance G Cooper Tomas Gedeon Konstantin Mischaikow Deborah G Murdock Siddharth Pratap K Sam Wells

By using current biological understanding, a conceptually simple, but mathematically complex, model is proposed for the dynamics of the gene circuit responsible for regulating nitrogen catabolite repression (NCR) in yeast. A variety of mathematical "structure" theorems are described that allow one to determine the asymptotic dynamics of complicated systems under very weak hypotheses. It is show...

Journal: :Journal of bacteriology 2010
Preston P Garcia Ryan M Bringhurst Catalina Arango Pinedo Daniel J Gage

When they are available, Sinorhizobium meliloti utilizes C(4)-dicarboxylic acids as preferred carbon sources for growth while suppressing the utilization of some secondary carbon sources such as α- and β-galactosides. The phenomenon of using succinate as the sole carbon source in the presence of secondary carbon sources is termed succinate-mediated catabolite repression (SMCR). Genetic screenin...

Journal: :Genetics 1980
H C Stark D Fugit D B Mowshowitz

The flk1 mutation, which was originally isolated in the yeast Saccharomyces carlsbergenesis, causes insensitivity to catabolite repression. This mutation has been further characterized and mapped. The gene flk1 is located on chromosome III between thr4 and MAL2, 14 centimorgans from MAL2. flk1 is shown to be allelic to the pleiotropic mutants tup1, cyc9, and umr7; and flk1 is shown to exhibit a...

2003
Octavio Loera Jesús Córdova

A diploid strain (D4) isolated via parasexual recombination between two Aspergillus niger xylanase overproducing mutants was characterised in terms of enzyme production and catabolite repression by glucose. This strain increased xylanase production (607 nkat/ml), which was nearly 100% higher than titers achieved by the wild type strain (305 nkat/ml) and 28% higher than the best mutant used to i...

2016
Yifei Wu Xiaolin Shen Qipeng Yuan Yajun Yan

Co-utilization of carbon sources in microbes is an important topic in metabolic engineering research. It is not only a way to reduce microbial production costs but also an attempt for either improving the yields of target products or decreasing the formation of byproducts. However, there are barriers in co-utilization of carbon sources in microbes, such as carbon catabolite repression. To overc...

Journal: :Nucleic Acids Research 2006
Oliver Schilling Christina Herzberg Tina Hertrich Hanna Vörsmann Dirk Jessen Sebastian Hübner Fritz Titgemeyer Jörg Stülke

Regulatory systems often evolve by duplication of ancestral systems and subsequent specialization of the components of the novel signal transduction systems. In the Gram-positive soil bacterium Bacillus subtilis, four homologous antitermination systems control the expression of genes involved in the metabolism of glucose, sucrose and beta-glucosides. Each of these systems is made up of a sensor...

Journal: :Journal of bacteriology 2008
Marcelo Mendez I-Hsiu Huang Kaori Ohtani Roberto Grau Tohru Shimizu Mahfuzur R Sarker

Clostridium perfringens is an anaerobic, gram-positive, spore-forming bacterium responsible for the production of severe histotoxic and gastrointestinal diseases in humans and animals. In silico analysis of the three available genome-sequenced C. perfringens strains (13, SM101, and ATCC13124) revealed that genes that encode flagellar proteins and genes involved in chemotaxis are absent. However...

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