Authors: Elena Borodina Donovan P Kelly Peter Schumann Frederick A Rainey Naomi L WardRainey Ann P Wood
Publish Date: 2001/12/04
Volume: 177, Issue: 2, Pages: 173-183
Abstract
Novel methylotrophic Arthrobacter and Hyphomicrobium species are described Constitutive membraneassociated dimethylsulfone and dimethylsulfoxidereductases were found in Arthrobacter methylotrophus strain TGA and Hyphomicrobium sulfonivorans strain S1 Enzyme activities increased during growth with dimethylsulfone or dimethylsulfoxide respectively and different ratios of activity with different growth substrates indicated that they are separate enzymes SDSPAGE showed some membraneassociated polypeptides to be enhanced during growth with dimethylsulfone 54 kDa in H sulfonivorans 21–24 kDa 54 kDa and 80 kDa in A methylotrophus Western blotting with antidimethylsulfoxidereductase antibody showed crossreaction with 54 and 21kDa polypeptides in A methylotrophus All strains contained rhodanese and sulfur oxygenase after growth with dimethylsulfone Sulfite was oxidized in the Arthrobacter species by APS reductase and sulfite dehydrogenase H sulfonivorans oxidized sulfite with APS reductase which is unusual for an αproteobacterium The Arthrobacter species were distinguished from each other and from other Arthrobacter and Micrococcus species by 16S rRNA gene sequence analysis The menaquinone and fatty acid profiles of the Arthrobacter species were similar Their peptidoglycan structures were LLys–LSer–LThr–LAla for A sulfonivorans and LLys–LAla2–4 for A methylotrophus H sulfonivorans exhibited gross morphology typical for Hyphomicrobium but possessed helically twisted prosthecae 16S rRNA gene sequence analysis showed it to be distinct from all the other Hyphomicrobium Filomicrobium and Pedomicrobium species sequenced to date Formal descriptions of the new species are given
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