Archives of Microbiology

, Volume 160, Issue 4, pp 312–318 | Cite as

Characterization of a DMSP-degrading bacterial isolate from the Sargasso Sea

  • Kathleen M. Ledyard
  • Edward F. DeLong
  • John W. H. Dacey
Original Papers


A bacterium which cleaves dimethylsulfoniopropionate (DMSP) to form dimethylsulfide (DMS) was isolated from surface Sargasso Sea water by a DMSP enrichment technique. The isolate, here designated LFR, is a Gram-negative, obligately aerobic, rod-shaped, carotenoid-containing bacterium with a DNA G+C content of 70%. Sequencing and comparison of its 16S ribosomal ribonucleic acid (rRNA) with that of known eubacteria revealed highest similarity (91% unrestricted sequence similarity) to Roseobacter denitrificans (formerly Erythrobacter species strain OCh114), an aerobic, bacteriochlorophyll-containing marine representative of the α-Proteobacteria. However, physiological differences between the two bacteria, and the current lack of other characterized close relatives, preclude assignment of strain LFR to the Roseobacter genus. Screening of fifteen characterized marine bacteria revealed only one, Pseudomonas doudoroffii, capable of degrading DMSP to DMS. Strain LFR is deposited with the American Type Culture Collection (ATCC 51258) and 16S rRNA sequence data are available under GenBank accession number 15345.

Key words

Dimethylsulfoniopropionate Dimethylsulfide DMSP lyase marine bacteria α-Proteobacteria Roseobacter denitrificans 


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Copyright information

© Springer Verlag 1993

Authors and Affiliations

  • Kathleen M. Ledyard
    • 1
  • Edward F. DeLong
    • 2
  • John W. H. Dacey
    • 3
  1. 1.Chemistry DepartmentWoods Hole Oceanographic InstitutionWoods HoleUSA
  2. 2.Department of BiologyUniversity of CaliforniaSanta BarbaraUSA
  3. 3.Biology DepartmentWoods Hole Oceanographic InstitutionWoods HoleUSA

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