The present invention relates to a recombinant microbial cell for producing at least one compound having structural Formula III from at least one simple carbon source:

##STR00001## wherein the simple carbon source is selected from the group consisting of glucose, sucrose, xylose, arabinose, mannose and glycerol; and wherein the cell comprises a further genetic modification to increase production of L-lysine in the cell from at least one of the simple carbon sources.

The embodiment of the present invention discloses Hangtaimycin derivatives and their preparation and application. Hangtaimycin derivatives are obtained by fermentation of Streptomyces spectabilis CCTCC M2017417 and its genetically knockout mutant strain in SFMR medium, with further isolation, purification, and alcoholysis. Through screening, Hangtaimycin derivatives showed excellent anti-inflammatory and analgesic, anti-tumor, liver injury protection, cell membrane protection, and drug addiction prevention activities, providing new drug leads for developing related drugs.

The present application relates to the technical field of biocatalysis and biosynthesis, and specifically discloses a blue pigment and a biosynthesis method thereof. In the present application, an indigoidine synthetase and a 4-phosphopantetheinyl transferase are expressed by a metabolically engineered strain to catalyze the biosynthesis of the blue pigment N-acetyl-indigoidine from glutamine and N-acetylglutamine, and a molecular structure of the blue pigment is inferred by mass spectrometry, nuclear magnetic resonance spectroscopy, etc. The present application achieves the catalytic synthesis of N-acetyl-indigoidine from glutamine and N-acetylglutamine in Escherichia coli (E. coli), Corynebacterium glutamicum (C. glutamicum), Saccharomyces cerevisiae (S. cerevisiae), and Streptomyces. Compared with indigoidine, N-acetyl-indigoidine has a maximum absorption wavelength of 584 nm, and a stable color having high brightness that is not easy to fade. Thus, the blue pigment shows an extensive application range and a promising industrial production prospect.

A microbial composition for improving the conditions in animal farms comprising: a slow-releasing carrier base having a first predetermined percentage by weight (w/w %); and a mixture of microorganisms identified in a 16S rRNA gene sequence so that the composition is capable of denitrification, feces decomposition, and hydrogen sulfide (H.sub.2S) oxidation.

The invention relates to a method of modulating production of a metabolite in an actinomycetes bacterium comprising increasing the expression or activity of the Sporulation and Antibiotic Production Related gene A (SarA. SCO4069) polypeptide to modulate production of the metabolite in the actinomycetes bacterium. In one embodiment, the metabolite is valinomycin, daidzein, fluvirucin, demethyllydicamycin, or TPU-0037 analogues A. C and D.

The present invention provides a new antibiotic compound termed nidaromycin derived from a new biosynthetic gene cluster (BGC), and its uses. Also provided herein are novel genes and nucleic acid molecules encoding the biosynthetic machinery for the production of nidaromycin, and to constructs, vectors, and host cells for expressing the BGC and methods for producing the compound.