Chemical Evolution of a Bacterial Proteome

Overview

Journal Angew Chem Int Ed Engl

Specialty Chemistry

Date 2015 Jul 3

PMID 26136259

Citations 30

Authors

Michael Georg Hoesl

Stefan Oehm

Patrick Durkin

Elise Darmon

Lauri Peil

Hans-Rudolf Aerni

Juri Rappsilber

Jesse Rinehart

David Leach

Dieter Soll

Nediljko Budisa

Affiliations

Soon will be listed here.

Abstract

We have changed the amino acid set of the genetic code of Escherichia coli by evolving cultures capable of growing on the synthetic noncanonical amino acid L-β-(thieno[3,2-b]pyrrolyl)alanine ([3,2]Tpa) as a sole surrogate for the canonical amino acid L-tryptophan (Trp). A long-term cultivation experiment in defined synthetic media resulted in the evolution of cells capable of surviving Trp→[3,2]Tpa substitutions in their proteomes in response to the 20,899 TGG codons of the E. coli W3110 genome. These evolved bacteria with new-to-nature amino acid composition showed robust growth in the complete absence of Trp. Our experimental results illustrate an approach for the evolution of synthetic cells with alternative biochemical building blocks.

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