[A-Factor as a selective agent for isolation of the soil Gram-negative bacterium strain--the producent of an antibacterial antibiotic]

Antibiot Khimioter. 2003;48(3):11-6.
[Article in Russian]

Abstract

It was shown the stimulating role of A-factor on soil prokaryotes growth. Soil sample culturing on agar medium, containing A-factor, resulted in the colony forming units (CFU) increasing in comparison with culturing on the medium without this regulator. Gram-negative bacteria were the reason of CFU increasing; previously the effect of A-factor on bacteria of this group was not shown. Gram-negative rod bacterial strain No. 35 was isolated and shown that CFU number was approximately twice increased at A-factor concentration in agar medium 2 and 7 mcg/ml; high A-factor concentration up to 28 mcg/ml was not effective. Isolated strain No. 35 is the producer of antibiotic, effective against gram-positive bacteria.

Publication types

  • English Abstract

MeSH terms

  • 4-Butyrolactone / analogs & derivatives*
  • 4-Butyrolactone / metabolism*
  • 4-Butyrolactone / pharmacology
  • Anti-Bacterial Agents / biosynthesis*
  • Colony Count, Microbial
  • Culture Media
  • Ecosystem*
  • Gram-Negative Bacteria / isolation & purification*
  • Gram-Negative Bacteria / metabolism
  • Gram-Positive Bacteria / growth & development
  • Growth Substances / metabolism*
  • Growth Substances / pharmacology
  • Soil Microbiology*

Substances

  • Anti-Bacterial Agents
  • Culture Media
  • Growth Substances
  • A-factor (Streptomyces)
  • 4-Butyrolactone