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Size exclusion chromatography: an improved method to harvest Corynebacterium glutamicum cells for the analysis of cytosolic metabolites.

Abstract：

:The efficient separation of Corynebacterium glutamicum cells from culture medium by size exclusion chromatography (SEC) is presented. Residue analysis demonstrated that this method effectively depletes extracellular compounds. For evaluation, SEC was compared with the common methods cold methanol treatment, fast centrifugation and fast filtration. For this purpose, samples of C. glutamicum cells from fermenter cultures were harvested and subjected to a metabolome analysis. In particular, the wild type strain C. glutamicum ATCC13032 and the lysine production strain C. glutamicum DM1730 were grown in a minimal or in a complex medium. Comparison of metabolite pool sizes after harvesting C. glutamicum cells by the methods mentioned above by gas chromatography coupled to mass spectrometry (GC-MS) revealed that SEC is the most suitable method when intracellular metabolite pools are to be measured during growth in complex media or in the presence of significant amounts of secreted metabolites. In contrast to the other methods tested, the SEC method turned out to be fast and able to remove extracellular compounds almost completely.

journal_name

J Biotechnol

journal_title

Journal of biotechnology

authors

Persicke M,Plassmeier J,Neuweger H,Rückert C,Pühler A,Kalinowski J

doi

10.1016/j.jbiotec.2010.08.016

subject

Has Abstract

pub_date

2011-07-10 00:00:00

pages

171-8

issue

2-3

eissn

0168-1656

issn

1873-4863

pii

S0168-1656(10)00407-4

journal_volume

154

pub_type

杂志文章

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