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Production of Antibiotics01:27

Production of Antibiotics

Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
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Updated: Jun 27, 2026

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
11:56

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids

Published on: May 4, 2018

New pacidamycin antibiotics through precursor-directed biosynthesis.

Sabine Grüschow1, Emma J Rackham, Benjamin Elkins

  • 1School of Chemical Sciences and Pharmacology, University of East Anglia, Earlham Road, Norwich NR4 7TJ, UK.

Chembiochem : a European Journal of Chemical Biology
|December 19, 2008
PubMed
Summary
This summary is machine-generated.

Researchers modified pacidamycin antibiotics using precursor-directed biosynthesis, creating novel derivatives. Halogenated analogues, like chloro- and bromopacidamycins, were produced in high yields, enabling further chemical modification.

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Last Updated: Jun 27, 2026

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
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Published on: May 4, 2018

Synthesis of Masarimycin, a Small Molecule Inhibitor of Gram-Positive Bacterial Growth
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Synthesis of Masarimycin, a Small Molecule Inhibitor of Gram-Positive Bacterial Growth

Published on: January 7, 2022

Area of Science:

  • Biochemistry
  • Natural Product Chemistry
  • Synthetic Biology

Background:

  • Pacidamycins, mureidomycins, and napsamycins are uridyl peptide antibiotics targeting translocase I.
  • Translocase I is a promising, yet unexploited, therapeutic target.
  • The complex structure and bioactivity of pacidamycin make it a compelling subject for research.

Purpose of the Study:

  • To explore precursor-directed biosynthesis for generating novel pacidamycin derivatives.
  • To investigate the substrate specificity of the pacidamycin biosynthetic machinery.
  • To create new analogues for potential therapeutic applications.

Main Methods:

  • Administering various tryptophan analogues to the biosynthetic machinery.
  • Utilizing precursor-directed biosynthesis to produce pacidamycin derivatives.
  • Analyzing the yield and structure of newly synthesized analogues.

Main Results:

  • The biosynthetic machinery demonstrated broad substrate specificity towards administered tryptophan analogues.
  • New pacidamycin derivatives were successfully produced.
  • Analogues derived from 2-methyl-, 7-methyl-, 7-chloro-, and 7-bromotryptophans were produced in higher yields than the natural pacidamycin.
  • Limited incorporation was observed for tryptophans substituted at positions 4, 5, and 6.
  • The generation of bromo- and chloropacidamycins was achieved, facilitating further chemical functionalization.

Conclusions:

  • Precursor-directed biosynthesis is an effective strategy for generating diverse pacidamycin analogues.
  • The relaxed substrate specificity of the biosynthetic machinery allows for significant structural modification.
  • The accessibility of halogenated pacidamycins opens avenues for creating expanded chemical libraries via cross-coupling reactions.