Download MendeleyOxidation of trimethylamine to trimethylamine N-oxide facilitates high hydrostatic pressure tolerance in a generalist bacterial lineage.
Qin, Q.L., Wang, Z.B., Su, H.N., Chen, X.L., Miao, J., Wang, X.J., Li, C.Y., Zhang, X.Y., Li, P.Y., Wang, M., Fang, J., Lidbury, I., Zhang, W., Zhang, X.H., Yang, G.P., Chen, Y., Zhang, Y.Z.(2021) Sci Adv 7
- PubMed: 33771875
- DOI: https://doi.org/10.1126/sciadv.abf9941
- Primary Citation of Related Structures:
6KBW - PubMed Abstract:
High hydrostatic pressure (HHP) is a characteristic environmental factor of the deep ocean. However, it remains unclear how piezotolerant bacteria adapt to HHP. Here, we identify a two-step metabolic pathway to cope with HHP stress in a piezotolerant bacterium. Myroides profundi D25 T , obtained from a deep-sea sediment, can take up trimethylamine (TMA) through a previously unidentified TMA transporter, TmaT, and oxidize intracellular TMA into trimethylamine N -oxide (TMAO) by a TMA monooxygenase, Mp Tmm. The produced TMAO is accumulated in the cell, functioning as a piezolyte, improving both growth and survival at HHP. The function of the TmaT- Mp Tmm pathway was further confirmed by introducing it into Escherichia coli and Bacillus subtilis Encoded TmaT-like and Mp Tmm-like sequences extensively exist in marine metagenomes, and other marine Bacteroidetes bacteria containing genes encoding TmaT-like and Mp Tmm-like proteins also have improved HHP tolerance in the presence of TMA, implying the universality of this HHP tolerance strategy in marine Bacteroidetes.
Organizational Affiliation:
State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
