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- W1870248034 abstract "We have developed a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS)-based identification technique for Planctomycetes organisms, which are used here as bacteria of suitable diversity at genus and species level for testing resolution of the method. Planctomyces maris ATCC 29201, Planctomyces brasiliensis ATCC 49424T, P. brasiliensis ATCC 49425, Planctomyces limnophilus ATCC 43296T, Blastopirellula marina ATCC 49069T, Rhodopirellula baltica DSM 10527T and Gemmata obscuriglobus DSM 5831T were cultured on half-strength marine broth and agar, or alternatively on caulobacter broth and agar. The resulting pellets of organisms (liquid) or colonies (solid agar) were directly applied to a MALDI-TOF plate. This yielded a reproducible, unique protein profiles comprising 23–39 peaks ranging in size from 2403 to 12 091 Da. These peaks were unambiguously distinguished from any of the 3038 bacterial spectra in the Brüker database. Matrix-assisted laser desorption/ionization time-of-flight patterns were similar for isolates grown in solid and in liquid medium, albeit the patterns from solid growth were more easily interpretable. After the incorporation of the herein determined profiles into the Brüker database, Planctomycetes isolates were blindly identified within 10 min, with an identification score in the range of 1.8 to 2.3. Matrix-assisted laser desorption/ionization time-of-flight-based clustering of these Planctomycetes organisms was consistent with 16S rDNA-based phylogeny. However, the incorporation of additional non-Planctomycetes MALDI-TOF profiles in the analysis resulted in inconsequential clustering. In conclusion, MALDI-TOF protein profiling is a new approach for the rapid and accurate identification of cultured environmental organisms, as illustrated in this study through the analysis of Planctomycetes." @default.
- W1870248034 created "2016-06-24" @default.
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- W1870248034 date "2010-11-21" @default.
- W1870248034 modified "2023-09-25" @default.
- W1870248034 title "Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for the identification of environmental organisms: the Planctomycetes paradigm" @default.
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- W1870248034 doi "https://doi.org/10.1111/j.1758-2229.2010.00176.x" @default.
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