Microalga Eats Plastic

  • Author: ChemistryViews.org
  • Published: 30 October 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Microbial Cell Factories/Springer Nature
thumbnail image: Microalga Eats Plastic

The biological degradation of plastics is currently investigated as an eco-friendly recycling strategy. In 2016, the bacterium Ideonella sakaiensis was isolated which could degrade polyethylene terephthalate (PET) using PETase and use the degradation products as its sole carbon source [1].

Daniel Moog, Philipps University Marburg and SYNMIKRO Research Center, Marburg, Germany, and colleagues have used synthetic biology to turn the photosynthetic microalga Phaeodactylum tricornutum into a microbial cell factory which produces and secretes an engineered version of PETase into the surrounding culture medium.

The produced PETase was active against industrially shredded PET in a salt water-based environment even at mesophilic temperatures (21 °C). PET degradation was particularly effective for plastic pieces smaller than 1 cm and at a water temperature of 30 °C. The degradation products were mainly terephthalic acid (TPA) and mono(2-hydroxyethyl) terephthalic acid (MHET). The team estimated that they are formed in the micromolar range under the selected reaction conditions.

According to the researchers, the modified microalgae could help to break down microplastics and PET plastics in the ocean. To achieve this, the system must be further optimized.


[1] S. Yoshida, K. Hiraga, T. Takehana, I. Taniguchi, H. Yamaji, Y. Maeda, K. Toyohara, K. Miyamoto, Y. Kimura, K. Oda, A bacterium that degrades and assimilates poly(ethylene terephthalate), Science 2016, 351, 1196–9. https://doi.org/10.1126/science.aad6359

 

Article Views: 756

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH