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The Barnacle Balanus improvisus as a Marine Model - Culturing and Gene Expression
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Bacillamidins A⁻G from a Marine-Derived

Si-Yu Zhou1, Yi-Jie Hu2, Fan-Cheng Meng3

  • 1Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Ministry of Education), College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China. vividysz@sina.com.

Marine Drugs
|September 14, 2018
PubMed
Summary

Marine bacteria Bacillus pumilus yielded seven long-chain amides, including five new bacillamidins. These compounds were evaluated for cytotoxic and antimicrobial activities.

Keywords:
Bacillus pumilusantimicrobial activitycytotoxic activitylong-chain amides

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Area of Science:

  • Marine natural products chemistry
  • Microbial secondary metabolites

Background:

  • Marine microorganisms are a rich source of novel bioactive compounds.
  • Bacillus species are known producers of diverse chemical structures.

Purpose of the Study:

  • To isolate and characterize new long-chain amides from Bacillus pumilus.
  • To evaluate the cytotoxic and antimicrobial potential of the isolated compounds.

Main Methods:

  • Isolation of compounds using chromatographic techniques.
  • Structure elucidation via 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy and High-Resolution Mass Spectrometry (HRMS).
  • Determination of absolute configurations using Electronic Circular Dichroism (ECD) spectroscopy.

Main Results:

  • Five new bacillamidins (1-5) and two known analogs (6-7) were identified.
  • Structures were confirmed through comprehensive spectroscopic analysis.
  • Cytotoxic and antimicrobial activities of all seven compounds were assessed.

Conclusions:

  • The marine-derived Bacillus pumilus strain RJA1515 produces a series of long-chain amides.
  • The isolated bacillamidins represent a novel class of marine natural products.
  • Further investigation into the biological activities of these compounds is warranted.