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In the present study, a novel strain of nitrate-dependent Fe-oxidizing bacteria (FOB) was isolated from the riparian zone sediment of the Hanjiang River, China. It was identified as Comamonas terrigena strain HJ-2. The strain HJ-2 oxidized 2.80\u00a0mmol l\u22121 Fe(II) within 144\u00a0h to form Fe(III)\/Fe(II) complex on the cell surface using 1.63\u00a0mmol l\u22121 nitrate as an electron acceptor. The formed nitrite from nitrate reduction chemically oxidized Fe(II). Surprisingly, this strain also reduced nitrilotriacetic iron to form 0.5\u00a0mmol l\u22121 Fe(II) in 120\u00a0h in anaerobic conditions primarily mediated by the NADH flavin oxidoreductase. Besides, the strain completely reduced 0.18\u00a0mmol l\u22121 nitrobenzene to aniline in 24 days and 15.6 \u03bcmol l\u22121 arsenate to arsenite in 7 days due to the existence of nitro and arsenate reductases. However, the Fe(II) inhibited the reduction of nitrate, nitrobenzene, and arsenate, possibly due to the impeding of transport of the solutes through the membrane or the synthesis of the related enzymes. These results provide new knowledge about the Fe(II)-cycling and the fate of some pollutants in the riparian zone. It also informed that some bacteria have universal functions on elements and contaminants transformation.<\/jats:p>","DOI":"10.1093\/lambio\/ovac022","type":"journal-article","created":{"date-parts":[[2024,4,8]],"date-time":"2024-04-08T13:44:55Z","timestamp":1712583895000},"source":"Crossref","is-referenced-by-count":5,"title":["Sediment-isolated <i>Comamonas terrigena<\/i> strain HJ-2: a novel nitrate-dependent ferrous-oxidizing bacterium with multifunction on pollutant transformation"],"prefix":"10.1093","volume":"76","author":[{"given":"Rong","family":"Peng","sequence":"first","affiliation":[{"name":"State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 68 Jincheng Street, East Lake High-Tech Development Zone, Wuhan , Hubei 430078, PR China"},{"name":"Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, 68 Jincheng Street, East Lake High-Tech Development 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