Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (24): 2513-2517.DOI: 10.6023/A12110883 Previous Articles     Next Articles



练荣伟a,b, 田晶a, 高鹏b, 王希越b, 费旭a, 王一a, 许国旺b   

  1. a 大连工业大学生物工程学院 大连 116034;
    b 中国科学院大连化学物理研究所 分离分析化学重点实验室 大连 116023
  • 投稿日期:2012-11-07 发布日期:2012-11-26
  • 通讯作者: 田晶, 高鹏;
  • 基金资助:

    项目受973计划(No. 2007CB707802)、中科院知识创新项目(No. KSCX1-YW-11)、国家自然科学基金(No. 20776029)和辽宁省高校人才项目(No. 2008RC07)资助.

Screening of Metabolite Regulating Lactic Acid Production of Exiguobacterium aurantiacum ATCC49676 by Metabolic Fingerprint Analysis

Lian Rongweia,b, Tian Jinga, Gao Pengb, Wang Xiyueb, Fei Xua, Wang Yia, Xu Guowangb   

  1. a School of Bioengineering, Dalian Polytechnic University, Dalian 116034;
    b CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023
  • Received:2012-11-07 Published:2012-11-26
  • Supported by:

    Project supported by the “973” project (No. 2007CB707802), Knowledge Innovation Program of Chinese Academy of Sciences (No. KSCX1-YW-11), the National Natural Science Foundation of China (No. 20776029), and the program of Talents in Universities supported by Liaoning Province (No. 2008RC07).

A strain of Exiguobacterium aurantiacum ATCC49676 was found to be of great potential to produce lactic acid (LA). In order to screen the metabolites that might regulate or affect the acid yield, a relative higher LA production condition was defined through full factorial experiment design. Fresh cultures harvested from the basic and the higher LA production conditions were subjected to metabolic fingerprint analysis by gas chromatography-mass spectrometry. Significance analysis indicated a distinct change of an intercellular metabolite-L-glutamic acid (Glu). When ATCC49676 was treated by Glu, LA yield declined with the increasing added Glu concentrations. Relative enzyme quantification confirmed that Glu decreased the intracellular lactate dehydrogenase content. This study proved the merit of metabolic fingerprint analysis in exploring the phenotype specific intracellular metabolite and its potential roles in improving industrial fermentation efficiencies.

Key words: metabolic fingerprint analysis, lactic acid, GC-MS, L-glutamic acid, LDH