title: Simultaneous analysis of microbial identity and function using NanoSIMS.
abstract: Identifying the function of uncultured microbes in their environments today remains one of the main challenges for microbial ecologists. In this article, we describe a new method allowing simultaneous analysis of microbial identity and function. This method is based on the visualization of oligonucleotide probe-conferred hybridization signal in single microbial cells and isotopic measurement using high-resolution ion microprobe (NanoSIMS). In order to characterize the potential of the method, an oligonucleotide containing iodized cytidine was hybridized on fixed cells of Escherichia coli cultured on media containing different levels of 13C or 15N. Iodine signals could clearly be localized on targeted cells and the isotopic enrichment could be monitored at the single-cell level. The applicability of this new technique to the study of in situ ecophysiology of uncultured microorganisms within complex microbial communities is illustrated.
authors.affiliation: Cemagref, Unité de Recherche Hydrosystèmes et Bioprocédés, Parc de Tourvoie, BP 44, 92163 Antony Cedex, France.
authors.forename: Tianlun
authors.initials: T
authors.lastname: Li
authors.forename: Ting-Di
authors.initials: TD
authors.lastname: Wu
authors.forename: Laurent
authors.initials: L
authors.lastname: Mazéas
authors.forename: Laurent
authors.initials: L
authors.lastname: Toffin
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Guerquin-Kern
authors.forename: Gérard
authors.initials: G
authors.lastname: Leblon
authors.forename: Théodore
authors.initials: T
authors.lastname: Bouchez
mesh_terms: D015373:Bacterial Typing Techniques / Q000379:methods*; D002247:Carbon Isotopes; D019411:Clinical Laboratory Techniques; D004783:Environmental Microbiology; D017403:In Situ Hybridization; D008828:Microbiological Techniques; D015345:Oligonucleotide Probes / Q000235:genetics / Q000378:metabolism*
chemical_list: D002247:Carbon Isotopes; D015345:Oligonucleotide Probes