trans-Stilbene degradation by Arthrobacter sp. SL3 cells

Area of Science:

• Microbiology
• Biochemistry
• Environmental Science

Background:

• Trans-stilbene is a stilbenoid with potential environmental and industrial applications.
• Microbial degradation pathways for aromatic compounds are crucial for bioremediation.
• Understanding the breakdown of trans-stilbene can reveal novel metabolic routes.

Purpose of the Study:

• To isolate and identify microorganisms capable of degrading trans-stilbene.
• To elucidate the degradation pathway of trans-stilbene by a selected microbial strain.
• To identify key intermediates in the microbial degradation of trans-stilbene.

Main Methods:

• Enrichment culture techniques were used to isolate trans-stilbene-degrading microorganisms.
• The most active strain, SL3, was identified using standard microbiological methods.
• Reaction products of trans-stilbene degradation by Arthrobacter sp. SL3 were analyzed to identify intermediates.

Main Results:

• Arthrobacter sp. strain SL3 exhibited the highest trans-stilbene-degrading activity.
• cis,cis-muconic acid was identified as a major degradation product.
• Arthrobacter sp. SL3 also transformed benzaldehyde, benzoic acid, and catechol into cis,cis-muconic acid.

Conclusions:

• Arthrobacter sp. strain SL3 effectively degrades trans-stilbene.
• The degradation pathway likely involves the cleavage of the C(alpha)=C(beta) bond of trans-stilbene, forming benzaldehyde.
• One benzene ring of trans-stilbene is converted to cis,cis-muconic acid, indicating a potential route for aromatic compound biodegradation.