Identification of genes for dimethyl sulfide production in bacteria in the gut of Atlantic Herring (Clupea harengus).
Phytoplankton are the primary producers of the sulfur-containing compatible solute dimethylsulfoniopropionate (DMSP). These cells are consumed by mesozooplankton, which, in turn, may be eaten by marine vertebrates. From the gut of one such animal, the Atlantic Herring Clupea harengus, we isolated strains of the gamma-proteobacteria Pseudomonas and Psychrobacter that grew on DMSP as sole carbon source, and which produced the environmentally important sulfurous volatile dimethyl sulfide (DMS). In both bacterial genera, this ability was because of the previously identified gene dddD, which specifies an enzyme that liberates DMS from DMSP. DMS production was stimulated by pre-growth of cells on the substrate DMSP. This is the first identification of DMSP-degrading bacteria and their relevant genes in the gut microflora of any vertebrate.
Curson
Andrew R J
AR
School of Biological Sciences, University of East Anglia, Norwich, UK.
Sullivan
Matthew J
MJ
Todd
Jonathan D
JD
Johnston
Andrew W B
AW
D000818:Animals; D043344:Chordata / Q000382:microbiology*; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D041981:Gastrointestinal Tract / Q000382:microbiology*; D023061:Gene Order; D053858:Metabolic Networks and Pathways / Q000235:genetics*; D008969:Molecular Sequence Data; D011549:Pseudomonas / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D044096:Psychrobacter / Q000145:classification / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D017422:Sequence Analysis, DNA; D013440:Sulfides / Q000378:metabolism*; D013452:Sulfonium Compounds / Q000378:metabolism
D004269:DNA, Bacterial; D013440:Sulfides; D013452:Sulfonium Compounds; C068078:dimethylpropiothetin; C004784:dimethyl sulfide