Condensation of an Additive-Free Cell Extract to Mimic the Conditions of Live Cells

Kei Fujiwara, Shin ichiro M Nomura

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The cellular environment differs from that of reconstituted materials mainly because of the presence of highly condensed biomacromolecules. To mimic the environment and conditions in living cells, we developed a method to prepare additive-free, highly concentrated cell extracts. First, we verified the requirement for specific salts and buffers for functional cell-free translation extracts. The S30 fraction of Escherichia coli cell extracts without additives exhibited sufficient cell-free protein production. Next, we established a method to accumulate biological components by gradual evaporation by using a vacuum desiccator. Bovine serum albumin, green fluorescent protein, alkaline phosphatase, and a diluted reconstituted protein expression system were successfully condensed in their active forms using this method. The protein concentration of the prepared cell extract was elevated to 180 mg/mL, which was expected to contain approximately 260 mg/mL macromolecules, without the loss of cell-free protein expression activity. Such a condensed cell extract may be useful for investigating the differences between cells and reconstituted materials and may contribute to the development of methods to synthesize cells from cell extracts in the future.

Original languageEnglish
Article numbere54155
JournalPLoS One
Volume8
Issue number1
DOIs
Publication statusPublished - 2013 Jan 17
Externally publishedYes

Fingerprint

Cell Extracts
Condensation
extracts
Proteins
cells
Bovine Serum Albumin
Green Fluorescent Proteins
Macromolecules
Escherichia coli
Alkaline Phosphatase
Buffers
Evaporation
Salts
Phosphoprotein Phosphatases
Social Conditions
Cells
Vacuum
tebufenozide
condensation (phase transition)
bovine serum albumin

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Condensation of an Additive-Free Cell Extract to Mimic the Conditions of Live Cells. / Fujiwara, Kei; Nomura, Shin ichiro M.

In: PLoS One, Vol. 8, No. 1, e54155, 17.01.2013.

Research output: Contribution to journalArticle

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