نتایج جستجو برای: tryptophan synthase

تعداد نتایج: 99594  

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2002
Tetsuya Matsukawa Atsushi Ishihara Hajime Iwamura

Oat phytoalexins, avenanthramides, are a series of substituted hydroxycinnamic acid amides with anthranilate. The anthranilate in avenanthramides is biosynthesized by anthranilate synthase (AS, EC 4.1.3.27). Induction of anthranilate synthase activity was investigated in oat leaves treated with oligo-N-acetylchitooligosaccharide elicitors. AS activity increased transiently, peaking 6 h after th...

Journal: :International Journal of Molecular Sciences 2021

Epidermal fragments enriched in guard cells (GCs) were isolated from the halophyte quinoa (Chenopodium Wild.) species, and response at proteome level was studied after salinity treatment of 300 mM NaCl for 3 weeks. In total, 2147 proteins identified, which 36% differentially expressed to stress GCs. Up downregulated included signaling molecules, enzyme modulators, transcription factors oxidored...

2001
Wilson Miles

We have obtained a complete set of 20 variants of the a subunit of tryptophan synthase of Escherichia coli at position 49 in order to extend our previous studies on the effects of single amino acid replacements at position 49 on structure and function. Thirteen mutant a subunits have been newly constructed by sitedirected mutagenesis using oligonucleotides. Six mutants were available from previ...

Journal: :Microbiology 2003
Hélène Bauby Isabelle Saint Girons Mathieu Picardeau

In bacteria, the first reaction of the tryptophan biosynthetic pathway involves the conversion of chorismate and glutamine to anthranilate by the action of anthranilate synthase, which is composed of the alpha (trpE gene product) and beta (trpG gene product) subunits. In this study, the tryptophan biosynthetic gene trpE of the spirochaete Leptospira meyeri was interrupted by a kanamycin-resista...

2010
Anke Meyer-Bäse Fabian J. Theis

The tryptophan operon of E. coli represents an important regulatory unit consisting of multiple feedback loops. The role of these loops is crucial to understand the dynamics of tryptophan biosynthesis. We analyze the robust stability of this system by splitting its state into fast (mRNA concentration) and slow (anthranilate synthase and tryptophan concentrations) variables, under consideration ...

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