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Violacein biotransformation by basidiomycetes and bacteria.
1Institute of Chemistry, Biological Chemistry Laboratory, Universidade Estadual de Campinas (UNICAMP), C.P. 6154, C.E.P. 13083-970, Campinas - São Paulo, Brazil.
Letters in Applied Microbiology
|September 18, 2001
Summary
This study explored the decolorization of violacein pigment by six microorganisms. Azotobacter vinelandii rapidly decolorized violacein in liquid media, while Lentinus edodes was effective on solid media, indicating microbial potential for pigment biotransformation.
Area of Science:
- Microbiology
- Biochemistry
- Environmental Science
Background:
- Violacein is a pigment produced by Chromobacterium violaceum.
- Biotransformation of microbial pigments is an area of interest for bioremediation and industrial applications.
- Understanding microbial decolorization capabilities is crucial for developing sustainable processes.
Purpose of the Study:
- To investigate the biotransformation of violacein pigment.
- To evaluate the decolorization efficiency of six different microorganisms in liquid and solid media.
- To analyze the enzymatic activities and siderophore production during the decolorization process.
Main Methods:
- Six different microbial strains were used for violacein decolorization experiments.
- Experiments were conducted in both liquid and solid media.
- Enzyme activities (lignin peroxidase, manganese peroxidase, laccase) and siderophore presence were assessed.
Main Results:
- Azotobacter vinelandii demonstrated rapid violacein decolorization in liquid media within 2 hours.
- Lentinus edodes showed the fastest decolorization on solid media by the 8th day.
- Enzyme activity varied among organisms, with notable manganese peroxidase and laccase activity, while lignin peroxidase activity was generally poor. Siderophores were detected in most experiments.
Conclusions:
- Microbial decolorization of violacein is feasible, with different efficiencies depending on the organism and medium.
- Enzyme profiles, particularly manganese peroxidase and laccase, play a role in violacein biotransformation.
- Siderophore production may be associated with the decolorization process.
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