A pathway for complete mineralization of the ambergris constituent (-)-Ambrox in Sphingomonas sp.

Sphingomonas spp. strains fully mineralize the complex polycyclic terpenoid (-)-Ambrox through a unique biodegradation pathway involving ring opening and β-oxidation.

• Why it matters: Understanding how complex natural compounds like saturated polycyclic terpenoids are biodegraded is limited, hindering insights into environmental degradation processes and bioremediation potential.
• What they did: Researchers isolated two Sphingomonas strains capable of rapid mineralization of (-)-Ambrox, elucidated seven metabolites via NMR and mass spectrometry, and mapped the complete pathway using 13C-labeled substrates and genomic sequencing.
• The result: The study reveals a conserved degradation pathway specific to natural (-)-Ambrox, enabling potential biotechnological applications in natural product breakdown and environmental cleanup of similar compounds.