Electroactive bacteria--molecular mechanisms and genetic tools.

Area of Science:

• Microbiology
• Bioelectrochemistry
• Synthetic Biology

Background:

• Bacteria have evolved extracellular electron transfer (EET) mechanisms.
• Electroactive bacteria (EAB) utilize EET for applications in bioelectrochemical systems (BES).
• BES, including microbial fuel cells (MFCs) and microbial electrosynthesis (MES), leverage EAB for sustainable processes.

Purpose of the Study:

• To review and compare the key microbiological features of diverse EAB.
• To highlight the achievements in genetic manipulation of EAB for enhanced performance.
• To discuss future prospects for strain development in BES applications.

Main Methods:

• Comparative analysis of microbiological characteristics of various EAB.
• Review of current research on genetic engineering strategies for EAB.
• Assessment of EAB performance in established BES.

Main Results:

• EAB possess unique EET pathways enabling electron exchange with electrodes.
• Genetic engineering approaches have shown promise in improving EAB efficiency and expanding their substrate range.
• Successful applications of EAB in MFCs and MES demonstrate their potential for energy and chemical synthesis.

Conclusions:

• EAB are crucial for the advancement of bioelectrochemical systems.
• Targeted genetic manipulation is key to optimizing EAB for industrial applications.
• Further research into EAB biology and engineering will drive sustainable bio-production.