Improved osmotolerance of recombinant Escherichia coli by de novo glycine betaine biosynthesis

N. von Weymarn, Antti Nyyssölä, Tapani Reinikainen, Matti Leisola, Heikki Ojamo

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

The genes from the extreme halophile Ectothiorhodospira halochloris encoding the biosynthesis of glycine betaine from glycine were cloned into Escherichia coli. The accumulation of glycine betaine and its effect on osmotolerance of the cells were studied. In mineral medium with NaCl concentrations from 0.15 to 0.5 M, the accumulation of both endogenously synthesized and exogenously provided glycine betaine stimulated the growth of E. coli. The intracellular levels of glycine betaine and the cellular yields were clearly higher for cells receiving glycine betaine exogenously than for cells synthesizing it. The lower level of glycine betaine accumulation in cells synthesizing it is most likely a consequence of the limited availability of precursors (e.g. S-adenosylmethionine) rather than the result of a low expression level of the genes. Glycine betaine also stimulated the growth of E. coli and decreased acetate formation in mineral medium with high sucrose concentrations (up to 200 g.l(-1)).
Original languageEnglish
Pages (from-to)214-218
Number of pages5
JournalApplied Microbiology and Biotechnology
Volume55
Issue number2
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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Betaine
Escherichia coli
Ectothiorhodospira
Minerals
Halobacteriales
S-Adenosylmethionine
Growth
Glycine
Sucrose
Acetates
Gene Expression
Genes

Cite this

von Weymarn, N. ; Nyyssölä, Antti ; Reinikainen, Tapani ; Leisola, Matti ; Ojamo, Heikki. / Improved osmotolerance of recombinant Escherichia coli by de novo glycine betaine biosynthesis. In: Applied Microbiology and Biotechnology. 2001 ; Vol. 55, No. 2. pp. 214-218.
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abstract = "The genes from the extreme halophile Ectothiorhodospira halochloris encoding the biosynthesis of glycine betaine from glycine were cloned into Escherichia coli. The accumulation of glycine betaine and its effect on osmotolerance of the cells were studied. In mineral medium with NaCl concentrations from 0.15 to 0.5 M, the accumulation of both endogenously synthesized and exogenously provided glycine betaine stimulated the growth of E. coli. The intracellular levels of glycine betaine and the cellular yields were clearly higher for cells receiving glycine betaine exogenously than for cells synthesizing it. The lower level of glycine betaine accumulation in cells synthesizing it is most likely a consequence of the limited availability of precursors (e.g. S-adenosylmethionine) rather than the result of a low expression level of the genes. Glycine betaine also stimulated the growth of E. coli and decreased acetate formation in mineral medium with high sucrose concentrations (up to 200 g.l(-1)).",
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Improved osmotolerance of recombinant Escherichia coli by de novo glycine betaine biosynthesis. / von Weymarn, N.; Nyyssölä, Antti; Reinikainen, Tapani; Leisola, Matti; Ojamo, Heikki.

In: Applied Microbiology and Biotechnology, Vol. 55, No. 2, 2001, p. 214-218.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Improved osmotolerance of recombinant Escherichia coli by de novo glycine betaine biosynthesis

AU - von Weymarn, N.

AU - Nyyssölä, Antti

AU - Reinikainen, Tapani

AU - Leisola, Matti

AU - Ojamo, Heikki

PY - 2001

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AB - The genes from the extreme halophile Ectothiorhodospira halochloris encoding the biosynthesis of glycine betaine from glycine were cloned into Escherichia coli. The accumulation of glycine betaine and its effect on osmotolerance of the cells were studied. In mineral medium with NaCl concentrations from 0.15 to 0.5 M, the accumulation of both endogenously synthesized and exogenously provided glycine betaine stimulated the growth of E. coli. The intracellular levels of glycine betaine and the cellular yields were clearly higher for cells receiving glycine betaine exogenously than for cells synthesizing it. The lower level of glycine betaine accumulation in cells synthesizing it is most likely a consequence of the limited availability of precursors (e.g. S-adenosylmethionine) rather than the result of a low expression level of the genes. Glycine betaine also stimulated the growth of E. coli and decreased acetate formation in mineral medium with high sucrose concentrations (up to 200 g.l(-1)).

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