Vol 4: Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm.Reportar como inadecuado



 Vol 4: Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm.


Vol 4: Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm. - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Descargar gratis o leer online en formato PDF el libro: Vol 4: Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm.
This article is from Scientific Reports, volume 4.AbstractIn situ reduction of selenite to elemental selenium Se0, by microorganisms in sediments and soils is an important process and greatly affects the environmental distribution and the biological effects of selenium. However, the mechanism behind such a biological process remains unrevealed yet. Here we use Shewanella oneidensis MR-1, a widely-distributed dissimilatory metal-reducing bacterium with a powerful and diverse respiration capability, to evaluate the involvement of anaerobic respiration system in the microbial selenite reduction. With mutants analysis, we identify fumarate reductase FccA as the terminal reductase of selenite in periplasm. Moreover, we find that such a reduction is dependent on central respiration c-type cytochrome CymA. In contrast, nitrate reductase, nitrite reductase, and the Mtr electron transfer pathway do not work as selenite reductases. These findings reveal a previously unrecognized role of anaerobic respiration reductases of S. oneidensis MR-1 in selenite reduction and geochemical cycles of selenium in sediments and soils.



Autor: Li, Dao-Bo; Cheng, Yuan-Yuan; Wu, Chao; Li, Wen-Wei; Li, Na; Yang, Zong-Chuang; Tong, Zhong-Hua; Yu, Han-Qing

Fuente: https://archive.org/







Documentos relacionados