Solution structure of a bacterial microcompartment targeting peptide and its application in the construction of an ethanol bioreactor

Andrew D. Lawrence, Stefanie Frank, Sarah Newnham, Matthew J. Lee, Ian R. Brown, Wei Feng Xue, Michelle L. Rowe, Daniel P. Mulvihill, Michael B. Prentice, Mark J. Howard, Martin J. Warren

Research output: Contribution to journalArticlepeer-review

121 Citations (Scopus)

Abstract

Targeting of proteins to bacterial microcompartments (BMCs) is mediated by an 18-amino-acid peptide sequence. Herein, we report the solution structure of the N-terminal targeting peptide (P18) of PduP, the aldehyde dehydrogenase associated with the 1,2-propanediol utilization metabolosome from Citrobacter freundii. The solution structure reveals the peptide to have a well-defined helical conformation along its whole length. Saturation transfer difference and transferred NOE NMR has highlighted the observed interaction surface on the peptide with its main interacting shell protein, PduK. By tagging both a pyruvate decarboxylase and an alcohol dehydrogenase with targeting peptides, it has been possible to direct these enzymes to empty BMCs in vivo and to generate an ethanol bioreactor. Not only are the purified, redesigned BMCs able to transform pyruvate into ethanol efficiently, but the strains containing the modified BMCs produce elevated levels of alcohol.

Original languageEnglish
Pages (from-to)454-465
Number of pages12
JournalACS Synthetic Biology
Volume3
Issue number7
DOIs
Publication statusPublished - 18 Jul 2014

Keywords

  • compartmentalization
  • metabolic engineering
  • propanediol utilization
  • synthetic biology

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