Cyclodipeptides are diverse chemical scaffolds that show a broad range of bioactivities relevant for medicine, agriculture, catalysis, and material sciences. can be synthesized enzymatically through two unrelated enzyme families, non-ribosomal peptide synthetases (NRPS) cyclodipeptide synthases (CDPSs). The diversity cyclodipeptides is derived from the amino acid side chains modification those ...

A cell line of Eschscholtzia californica selected for meta-fluorotyrosine (MFT) tolerance was found to have 10-fold increased levels of phenylalanine and tyrosine compared to the parent line, while most other amino acids were only increased 2-fold. Tracer experiments with shikimic acid in the presence of MFT showed that the biosynthesis of the aromatic amino acids was not impaired in the tolera...

Protylonolide is a lactonic precursor of tylosin aglycone, produced by a mutant of Streptomyces fradiae. It originates from n-butyrate, propionate and acetate units. Studies were carried out using a protylonolide-producing mutant on the correlation between protylonolide biosynthesis, regulation by NH4+ and amino acid metabolism. Protylonolide production decreased in a defined medium containing ...

The pathway of aromatic amino acid biosynthesis was initiated by the enzyme DAHP synthase. In this branched biosynthetic pathway phenylalanine, tyrosine and tryptophan are produced. This enzyme was repressed and inhibited by three said end product of aromatic amino acids. The importance of this enzyme is microbial fermentation of aromatic amino acid production. The present study envisaged the i...

The analogs of rhizobitoxine, aminoethoxyvinylglycine (AVG) (l-2-amino-4-2'-aminoethoxy-trans-3 butenoic acid) and methoxyvinylglycine (MVG) (l-2-amino-4-methoxy-trans-3-butenoic acid), that are potent inhibitors of ethylene biosynthesis at 0.1 millimolar also inhibited protein synthesis and charging of tRNA especially at 1 millimolar and higher concentrations. The saturated analog of MVG inhib...