期刊
BIOTECHNOLOGY ADVANCES
卷 53, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biotechadv.2020.107682
关键词
Extracellular electron transfer (EET); Electroactive microorganisms (EAMs); Electroactivity; Cytochrome; Electron shuttles; Biofilms
资金
- National Key Research and Development Program of China [2018YFA0901300]
- National Natural Science Foundation of China [NSFC-21776209, NSFC-21621004, NSFC32001034, NSFC-32071411]
This review explores the extracellular electron transfer (EET) mechanisms of electroactive microorganisms (EAMs) and their applications in bioelectrochemical systems, focusing on bacteria, fungi, and archaea. Additionally, the article provides detailed insights into three engineering strategies aimed at improving the EET ability of EAMs.
Electroactive microorganisms (EAMs) are ubiquitous in nature and have attracted considerable attention as they can be used for energy recovery and environmental remediation via their extracellular electron transfer (EET) capabilities. Although the EET mechanisms of Shewanella and Geobacter have been rigorously investigated and are well characterized, much less is known about the EET mechanisms of other microorganisms. For EAMs, efficient EET is crucial for the sustainable economic development of bioelectrochemical systems (BESs). Currently, the low efficiency of EET remains a key factor in limiting the development of BESs. In this review, we focus on the EET mechanisms of different microorganisms, (i.e., bacteria, fungi, and archaea). In addition, we describe in detail three engineering strategies for improving the EET ability of EAMs: (1) enhancing transmembrane electron transport via cytochrome protein channels; (2) accelerating electron transport via electron shuttle synthesis and transmission; and (3) promoting the microbe-electrode interface reaction via regulating biofilm formation. At the end of this review, we look to the future, with an emphasis on the cross-disciplinary integration of systems biology and synthetic biology to build high-performance EAM systems.
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