6.2.1.44 ATP + 3-(methylthio)propanoate + CoA - Ruegeria pomeroyi AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA - Candidatus Pelagibacter ubique AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA - Ruegeria lacuscaerulensis AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA - Pseudomonas aeruginosa AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA - Burkholderia thailandensis AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA degradation 3-(methylthio)propanoate, the first product in 3-(dimethylsulfonio)propanoate degradation. 3-(Dimethylsulfonio)propanoate is an osmolyte of many marine algae and certain plants. The global importance of dimethylsulfoniopropionate lies in its availability as a carbon and sulfur source for marine microorganisms and as a precursor of the gas dimethylsulfide, the oceanic emission of which leads to the formation of cloud condensation nuclei and promotion of solar radiation backscatter. Two competing pathways exist for the bacterial catabolism of 3-(dimethylsulfonio)propanoate, one releasing dimethylsulphide and the other releasing methanethiol Ruegeria pomeroyi AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA once released from phytoplankton, marine bacteria degrade dimethylsulfoniopropionate by either the cleavage pathway to form the volatile gas dimethylsulfide or the demethylation pathway, yielding methanethiol, which is readily assimilated or oxidized. The enzyme DmdB, a methylmercaptopropionate-coenzyme A ligase, catalyzes the second step in the demethylation pathway and is a major regulatory point. Two forms of DmdB are present in the marine roseobacter Ruegeria pomeroyi DSS-3, RPO_DmdB1 and RPO_DmdB2 Candidatus Pelagibacter ubique AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA once released from phytoplankton, marine bacteria degrade dimethylsulfoniopropionate by either the cleavage pathway to form the volatile gas dimethylsulfide or the demethylation pathway, yielding methanethiol, which is readily assimilated or oxidized. The enzyme DmdB, a methylmercaptopropionate-coenzyme A ligase, catalyzes the second step in the demethylation pathway and is a major regulatory point. Two forms of DmdB are present in the marine roseobacter Ruegeria pomeroyi DSS-3, RPO_DmdB1 and RPO_DmdB2 Ruegeria pomeroyi AMP + diphosphate + 3-(methylthio)propionyl-CoA - ? 427363 6.2.1.44 ATP + 3-(methylthio)propanoate + CoA once released from phytoplankton, marine bacteria degrade dimethylsulfoniopropionate by either the cleavage pathway to form the volatile gas dimethylsulfide or the demethylation pathway, yielding methanethiol, which is readily assimilated or oxidized. The enzyme DmdB, a methylmercaptopropionate-coenzyme A ligase, catalyzes the second step in the demethylation pathway and is a major regulatory point. Two forms of DmdB are present in the marine roseobacter Ruegeria pomeroyi DSS-3, RPO_DmdB1 and RPO_DmdB2 Ruegeria pomeroyi AMP + diphosphate + 3-methylmercaptopropionyl-CoA - ? 427364 6.2.1.44 ATP + 3-methylbutanoate + CoA activity is 14% of the activity with 3-(methylthio)propanoate Ruegeria pomeroyi AMP + diphosphate + 3-methylbutanoyl-CoA - ? 428220