Archaeal phospholipid biosynthetic pathway reconstructed in Escherichia coli

Archaea. 2012:2012:438931. doi: 10.1155/2012/438931. Epub 2012 May 9.

Abstract

A part of the biosynthetic pathway of archaeal membrane lipids, comprised of 4 archaeal enzymes, was reconstructed in the cells of Escherichia coli. The genes of the enzymes were cloned from a mesophilic methanogen, Methanosarcina acetivorans, and the activity of each enzyme was confirmed using recombinant proteins. In vitro radioassay showed that the 4 enzymes are sufficient to synthesize an intermediate of archaeal membrane lipid biosynthesis, that is, 2,3-di-O-geranylgeranyl-sn-glycerol-1-phosphate, from precursors that can be produced endogenously in E. coli. Introduction of the 4 genes into E. coli resulted in the production of archaeal-type lipids. Detailed liquid chromatography/electron spray ionization-mass spectrometry analyses showed that they are metabolites from the expected intermediate, that is, 2,3-di-O-geranylgeranyl-sn-glycerol and 2,3-di-O-geranylgeranyl-sn-glycerol-1-phosphoglycerol. The metabolic processes, that is, dephosphorylation and glycerol modification, are likely catalyzed by endogenous enzymes of E. coli.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Archaeal Proteins / genetics
  • Archaeal Proteins / metabolism*
  • Biosynthetic Pathways / genetics*
  • Chromatography, Liquid
  • Cloning, Molecular
  • Escherichia coli / chemistry
  • Escherichia coli / genetics*
  • Escherichia coli / metabolism*
  • Membrane Lipids / biosynthesis
  • Metabolic Engineering
  • Methanosarcina / enzymology*
  • Methanosarcina / genetics
  • Models, Biological
  • Phospholipids / biosynthesis*
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization

Substances

  • Archaeal Proteins
  • Membrane Lipids
  • Phospholipids
  • Recombinant Proteins