scholarly journals Biosorption of fluoride ion from water using the seeds of the cabbage tree (Moringa stenopetala)

2017 ◽  
Vol 11 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Tiku Mereta Seid
Keyword(s):  
Fluoride Ion ◽  
Moringa Stenopetala ◽  
Cabbage Tree

Targeted Fluorination with the Fluoride Ion by Manganese-Catalyzed Decarboxylation

2015 ◽  
Vol 127 (17) ◽  
pp. 5330-5334 ◽  
Author(s):  
Xiongyi Huang ◽  
Wei Liu ◽  
Jacob M. Hooker ◽  
John T. Groves
Keyword(s):  
Fluoride Ion

scholarly journals Base-Pair Opening Dynamics Study of Fluoride Riboswitch in the Bacillus cereus CrcB Gene

2021 ◽  
Vol 22 (6) ◽  
pp. 3234
Author(s):  
Juhyun Lee ◽  
Si-Eun Sung ◽  
Janghyun Lee ◽  
Jin Young Kang ◽  
Joon-Hwa Lee ◽  
...  
Keyword(s):  
Gene Expression ◽  
Gene Regulation ◽  
Nmr Spectroscopy ◽  
Bacillus Cereus ◽  
Base Pair ◽  
Noncoding Rna ◽  
Hydrogen Exchange ◽  
Magnesium Ion ◽  
Fluoride Ion ◽  
Base Pair Opening

Riboswitches are segments of noncoding RNA that bind with metabolites, resulting in a change in gene expression. To understand the molecular mechanism of gene regulation in a fluoride riboswitch, a base-pair opening dynamics study was performed with and without ligands using the Bacillus cereus fluoride riboswitch. We demonstrate that the structural stability of the fluoride riboswitch is caused by two steps depending on ligands. Upon binding of a magnesium ion, significant changes in a conformation of the riboswitch occur, resulting in the greatest increase in their stability and changes in dynamics by a fluoride ion. Examining hydrogen exchange dynamics through NMR spectroscopy, we reveal that the stabilization of the U45·A37 base-pair due to the binding of the fluoride ion, by changing the dynamics while maintaining the structure, results in transcription regulation. Our results demonstrate that the opening dynamics and stabilities of a fluoride riboswitch in different ion states are essential for the genetic switching mechanism.

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