Comparison of Carbonic Anhydrases for CO2 Sequestration

Strategies for depleting carbon dioxide (CO2) from flue gases are urgently needed and carbonic anhydrases (CAs) can contribute to solving this problem. They catalyze the hydration of CO2 in aqueous solutions and therefore capture the CO2. However, the harsh conditions due to varying process temperat...

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Bibliographic Details
Published in:International journal of molecular sciences 2022-01, Vol.23 (2), p.957
Main Authors: Steger, Franziska, Reich, Johanna, Fuchs, Werner, Rittmann, Simon K.-M. R., Gübitz, Georg M., Ribitsch, Doris, Bochmann, Günther
Format: Article
Language:English
Subjects:
activity assay
Alternative energy sources
Anaerobic microorganisms
Aqueous solutions
Carbon dioxide
carbonic anhydrase
CO2 sequestration
E coli
Energy resources
Enzymes
Flue gas
Hydration
Microorganisms
Organisms
Peptides
Proteins
recombinant expression
Renewable resources
Solvents
thermostability
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Summary:Strategies for depleting carbon dioxide (CO2) from flue gases are urgently needed and carbonic anhydrases (CAs) can contribute to solving this problem. They catalyze the hydration of CO2 in aqueous solutions and therefore capture the CO2. However, the harsh conditions due to varying process temperatures are limiting factors for the application of enzymes. The current study aims to examine four recombinantly produced CAs from different organisms, namely CAs from Acetobacterium woodii (AwCA or CynT), Persephonella marina (PmCA), Methanobacterium thermoautotrophicum (MtaCA or Cab) and Sulphurihydrogenibium yellowstonense (SspCA). The highest expression yields and activities were found for AwCA (1814 WAU mg−1 AwCA) and PmCA (1748 WAU mg−1 PmCA). AwCA was highly stable in a mesophilic temperature range, whereas PmCA proved to be exceptionally thermostable. Our results indicate the potential to utilize CAs from anaerobic microorganisms to develop CO2 sequestration applications.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23020957