Veronica Carbonell
University of Turku, Finland
Title: Development of stable recombinant cyanobacteria for economically competent solar-fuel-factories: ethylene production
Biography
Biography: Veronica Carbonell
Abstract
Statement of the problem: Greenhouse gas emissions and limited fossil fuel reserves increase the need to find alternative ways to generate substitutes for petroleum-derived products such as ethylene. Ethylene is a simple alkene of commercial value due to multitude of large-scale uses in plastic industry and ever growing demand. One of the promising approaches is to use cyanobacterial cells as biological factories, through their photosynthetic capacity to produce ethylene using atmospheric CO2 and water as substrates. Methodology & Theorical Orientation: The biosynthesis of ethylene has been studied in Synechoccocus sp 7942 by over-expressing the heterologous ethylene forming enzyme (efe) from Pseudomonas syringae which converts the endogenous metabolic precursor 2-oxoglutarate to ethylene. As a volatile gas, ethylene then diffuses out from the cell and spontaneously separates into the culture headspace for collection and analysis. Findings: We have studied different aspects of observed genetic instability which have earlier compromised prolonged ethylene production in Synechococcus and developed stable production strains capable of sustained autotrophic ethylene biosynthesis. Conclusion & Significance: Although the production lev 5:els still remain below the threshold required for commercial applications, cyanobacteria have been intensively studied in this respect, and a range of molecular biology tools and production platforms are being developed and characterized.