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Bacillus subtilis contains multiple forms of somatostatin-like material
Biochemical and Biophysical Research Communications
|March 29, 1985
Summary
Bacillus subtilis produces somatostatin-like peptides, including forms similar to somatostatin-28 and somatostatin-14. These peptides exhibit biological activity, indicating a novel function for B. subtilis in peptide production.
Area of Science:
- Microbiology
- Biochemistry
- Molecular Biology
Background:
- Somatostatin is a peptide hormone with diverse physiological roles.
- The presence and function of somatostatin-like molecules in bacteria are not well-established.
Purpose of the Study:
- To investigate the presence and characterization of somatostatin-like immunoactivity in Bacillus subtilis.
- To determine the biological activity and forms of these somatostatin-like molecules.
Main Methods:
- Immunoassays targeting N- and C-terminal regions of somatostatin.
- Bioassays to assess biological activity.
- Analysis of conditioned and preconditioned growth media.
Main Results:
- Bacillus subtilis extracts contain somatostatin-like immunoactivity (1-20 pg/g).
- Two major forms were identified, resembling somatostatin-28 and somatostatin-14.
- Both forms demonstrated bioactivity, neutralized by somatostatin-14 antibodies.
- Conditioned medium contained 80-380 pg/L, while preconditioned medium had none.
Conclusions:
- Bacillus subtilis produces biologically active somatostatin-like peptides.
- These findings suggest a potential novel role for B. subtilis in producing peptide hormones.
- Further research is warranted to elucidate the specific functions and pathways of these bacterial somatostatins.