TCA cycle enhancement and uptake of monomeric substrates support growth of marine Roseobacter at low temperature View Full Text


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Article Info

DATE

2022-07-14

AUTHORS

Meng Wang, Huan Wang, Peng Wang, Hui-Hui Fu, Chun-Yang Li, Qi-Long Qin, Yantao Liang, Min Wang, Xiu-Lan Chen, Yu-Zhong Zhang, Weipeng Zhang

ABSTRACT

Members of the marine Roseobacter group are ubiquitous in global oceans, but their cold-adaptive strategies have barely been studied. Here, as represented by Loktanella salsilacus strains enriched in polar regions, we firstly characterized the metabolic features of a cold-adapted Roseobacter by multi-omics, enzyme activities, and carbon utilization procedures. Unlike in most cold-adapted microorganisms, the TCA cycle is enhanced by accumulating more enzyme molecules, whereas genes for thiosulfate oxidation, sulfate reduction, nitrate reduction, and urea metabolism are all expressed at lower abundance when L. salsilacus was growing at 5 °C in comparison with higher temperatures. Moreover, a carbon-source competition experiment has evidenced the preferential use of glucose rather than sucrose at low temperature. This selective utilization is likely to be controlled by the carbon source uptake and transformation steps, which also reflects an economic calculation balancing energy production and functional plasticity. These findings provide a mechanistic understanding of how a Roseobacter member and possibly others as well counteract polar constraints. More... »

PAGES

705

References to SciGraph publications

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  • Identifiers

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    http://scigraph.springernature.com/pub.10.1038/s42003-022-03631-2

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