Glycogen is the primary source of glucose during the lag phase of E. coli proliferation

Tomoaki Yamamotoya, Hitomi Dose, Zhongyuan Tian, Adrien Fauré, Yoshihiro Toya, Masayuki Honma, Kaori Igarashi, Kenji Nakahigashi, Tomoyoshi Soga, Hirotada Mori, Hiroshi Matsuno

研究成果: Article査読

26 被引用数 (Scopus)

抄録

In the studies of Escherichia coli (E. coli), metabolomics analyses have mainly been performed using steady state culture. However, to analyze the dynamic changes in cellular metabolism, we performed a profiling of concentration of metabolites by using batch culture. As a first step, we focused on glucose uptake and the behavior of the first metabolite, G6P (glucose-6-phosphate). A computational formula was derived to express the glucose uptake rate by a single cell from two kinds of experimental data, extracellular glucose concentration and cell growth, being simulated by Cell Illustrator. In addition, average concentration of G6P has been measured by CE-MS. The existence of another carbon source was suggested from the computational result. After careful comparison between cell growth, G6P concentration, and the computationally obtained curve of glucose uptake rate, we predicted the consumption of glycogen in lag phase and its accumulation as an energy source in an E. coli cell for the next proliferation. We confirmed our prediction experimentally. This behavior indicates the importance of glycogen participation in the lag phase for the growth of E. coli. This article is part of a Special Issue entitled: Computational Methods for Protein Interaction and Structural Prediction.

本文言語English
ページ(範囲)1442-1448
ページ数7
ジャーナルBiochimica et Biophysica Acta - Proteins and Proteomics
1824
12
DOI
出版ステータスPublished - 2012 12月

ASJC Scopus subject areas

  • 分析化学
  • 生物理学
  • 生化学
  • 分子生物学

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