title: [The fractionation of chlorine isotopes by the aerobic methylotrophic bacterium Methylobacterium dichloromethanicum grown on dichloromethane].
abstract: Methylobacterium dichloromethanicum was found to be able to utilize dichloromethane (DCM) as the source of carbon and energy with the production of biomass, CO2, and HCl. A comparative analysis of abundances of the major DCM isotopomers 35Cl(2)12C1H2, 35Cl37Cl12C1H2 and 37Cl(2)12CH2 made it possible to estimate the fractionation of chlorine isotopes during the bacterial metabolism of DCM. The kinetic chlorine isotope effects for 35Cl37Cl12C1H2 (m/z 86) and 37Cl(2)12C1H2 (m/z 88) relative to 35Cl(2)12C1H2 (m/z 84) turned out to be alpha 86/84 = 1.006 +/- 0.002 and alpha 88/84 = 1.023 +/- 0.003, respectively. The inference is made that the growth of M. dichloromethanicum on DCM is accompanied by the mass-independent fractionation of the DCM isotopomers.
authors.affiliation: Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, pr. Nauki 5, Pushchino, Moscow Oblast, 142290 Russia.
authors.forename: A M
authors.initials: AM
authors.lastname: Ziakun
authors.forename: N V
authors.initials: NV
authors.lastname: Doronina
authors.forename: V N
authors.initials: VN
authors.lastname: Zakharchenko
authors.forename: Iu A
authors.initials: IuA
authors.lastname: Trotsenko
mesh_terms: D005591:Chemical Fractionation; D002713:Chlorine / Q000737:chemistry / Q000378:metabolism; D003470:Culture Media; D007553:Isotope Labeling; D007554:Isotopes / Q000737:chemistry / Q000378:metabolism; D008752:Methylene Chloride / Q000737:chemistry / Q000378:metabolism*; D020580:Methylobacterium / Q000378:metabolism*; D013379:Substrate Specificity
chemical_list: D003470:Culture Media; D007554:Isotopes; D002713:Chlorine; D008752:Methylene Chloride