硒
拉伤
化学
谷胱甘肽
生物修复
生物化学
硝酸还原酶
细菌
生物
酶
有机化学
遗传学
解剖
作者
Mingshi Wang Daihua Jiang,Xuejiao Huang
出处
期刊:iScience
[Elsevier]
日期:2022-08-01
卷期号:25 (9): 104904-104904
标识
DOI:10.1016/j.isci.2022.104904
摘要
Summary
Microorganisms with high selenite-tolerant and efficient reduction ability of selenite have seldom been reported. In this study, a highly selenite-resistant strain (up to 500 mM), isolated from lateritic red soil, was identified as Proteus penneri LAB-1. Remarkably, isolate LAB-1 reduced nearly 2 mM of selenite within 18 h with the production of selenium nanoparticles (SeNPs) at the beginning of the exponential phase. Moreover, in vitro selenite reduction activities of strain LAB-1 were detected in the membrane protein fraction with or without NADPH/NADH as electron donors. Strain LAB-1 transported selenite to the membrane via nitrate transport protein. The selenite was reduced to SeNPs through the glutathione pathway and the catalysis of nitrate reductase, and the glutathione pathway played the decisive role. P. penneri LAB-1 could be a potential candidate for the selenite bioremediation and SeNPs synthesis.
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