scholarly journals Ferrous Iron Binding Key to Mms6 Magnetite Biomineralisation: A Mechanistic Study to Understand Magnetite Formation Using pH Titration and NMR Spectroscopy

2016 ◽  
Vol 22 (23) ◽  
pp. 7885-7894 ◽  
Author(s):  
Andrea E. Rawlings ◽  
Jonathan P. Bramble ◽  
Andrea M. Hounslow ◽  
Michael P. Williamson ◽  
Amy E. Monnington ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Ferrous Iron ◽  
Mechanistic Study ◽  
Iron Binding ◽  
Ph Titration ◽  
Magnetite Formation

Fries Rearrangement of Aryl Formates:  A Mechanistic Study by Means of1H,2H, and11B NMR Spectroscopy and DFT Calculations

2006 ◽  
Vol 71 (25) ◽  
pp. 9331-9340 ◽  
Author(s):  
Alessandro Bagno ◽  
Willi Kantlehner ◽  
Ralf Kress ◽  
Giacomo Saielli ◽  
Edmont Stoyanov
Keyword(s):  
Nmr Spectroscopy ◽  
Dft Calculations ◽  
Mechanistic Study ◽  
Fries Rearrangement

scholarly journals Do FeS clusters rule bacterial iron regulation?

2020 ◽  
Vol 295 (46) ◽  
pp. 15464-15465
Author(s):  
Roland Lill
Keyword(s):  
Escherichia Coli ◽  
Ferrous Iron ◽  
Iron Uptake ◽  
Iron Regulation ◽  
Ferric Uptake Regulator ◽  
Iron Binding ◽  
Cellular Iron ◽  
Open Question ◽  
Exciting Possibility

For decades, the bacterial ferric uptake regulator (Fur) has been thought to respond to ferrous iron to transcriptionally regulate genes required for balancing iron uptake, storage, and utilization. Because iron binding to Fur has never been confirmed in vivo, the physiological iron-sensing mechanism remains an open question. Fontenot et al. now show that Fur purified from Escherichia coli binds an all-Cys-coordinated [2Fe-2S] cluster. This finding opens the exciting possibility that Fur may join numerous well-studied bacterial, fungal, and mammalian proteins that use FeS clusters for cellular iron regulation.

The mechanism of ferrous iron binding by suspensions of Bifidobacterium bifidum var. pennsylvanicus

1986 ◽  
Vol 884 (1) ◽  
pp. 60-66 ◽  
Author(s):  
Anatoly Bezkorovainy ◽  
Robin Miller-Catchpole ◽  
Mark Poch ◽  
Leslie Solberg
Keyword(s):  
Ferrous Iron ◽  
Bifidobacterium Bifidum ◽  
Iron Binding

Mechanism and regulation of synthesis of aerobactin in Escherichia coli K12 (pColV-K30)

1992 ◽  
Vol 38 (7) ◽  
pp. 728-733 ◽  
Author(s):  
J. B. Neilands
Keyword(s):  
Escherichia Coli ◽  
Ferrous Iron ◽  
Attachment Site ◽  
Virulence Plasmid ◽  
Transcriptional Level ◽  
Iron Binding ◽  
Terminal Part ◽  
Escherichia Coli K12 ◽  
Regulation Of Synthesis ◽  
Iron Binding Protein

The aerobactin operon of the virulence plasmid pColV-K30 of Escherichia coli K12 consists of four genes for biosynthesis and one for transport of the siderophore. Regulation by iron occurs at the transcriptional level and is mediated by a ferrous iron binding protein designated Fur (ferric uptake regulation). The metallated Fur repressor binds at a palindromic dyad, the "iron box" operator, situated in the vicinity of the RNA polymerase attachment site of the promoter. Evidence suggests that the ferrous iron enters the C-terminal domain of Fur to cause a conformational change in the N-terminal part of the protein. This results in greatly enhanced affinity of the repressor for the operator. Key words: aerobactin, enterobactin, Fur repressor, regulation, siderophores, virulence.

scholarly journals Global Gene Expression Analysis of Iron-Inducible Genes in Magnetospirillum magneticum AMB-1

2006 ◽  
Vol 188 (6) ◽  
pp. 2275-2279 ◽  
Author(s):  
Takeyuki Suzuki ◽  
Yoshiko Okamura ◽  
Ronie J. Calugay ◽  
Haruko Takeyama ◽  
Tadashi Matsunaga
Keyword(s):  
Expression Profiling ◽  
Ferrous Iron ◽  
Iron Uptake ◽  
Gene Expression Analysis ◽  
Global Gene Expression ◽  
Iron Supply ◽  
Global Gene Expression Analysis ◽  
Inducible Genes ◽  
Magnetospirillum Magneticum ◽  
Magnetite Formation

ABSTRACT Iron uptake systems were identified by global expression profiling of Magnetospirillum magneticum AMB-1. feo, tpd, and ftr, which encode ferrous iron transporters, were up-regulated under iron-rich conditions. The concomitant rapid iron uptake and magnetite formation suggest that these uptake systems serve as iron supply lines for magnetosome synthesis.

Mechanistic Study of Bu2SnCl2-Mediated Ring-Opening Polymerization ofɛ-Caprolactone by Multinuclear NMR Spectroscopy

2003 ◽  
Vol 9 (18) ◽  
pp. 4346-4352 ◽  
Author(s):  
Gaëlle Deshayes ◽  
Frédéric A. G. Mercier ◽  
Philippe Degée ◽  
Ingrid Verbruggen ◽  
Monique Biesemans ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Mechanistic Study ◽  
Multinuclear Nmr ◽  
Multinuclear Nmr Spectroscopy

scholarly journals A multi-pronged mechanistic study of the phosphine-mediated conjugate addition of an alcohol to an acetylenic ester

2014 ◽  
Vol 38 (11) ◽  
pp. 5382-5390 ◽  
Author(s):  
Rhonda L. Stoddard ◽  
Jingwei Luo ◽  
Nicole van der Wal ◽  
Natasha F. O'Rourke ◽  
Jeremy E. Wulff ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Conjugate Addition ◽  
Ionization Mass Spectrometry ◽  
Mechanistic Study ◽  
Ionization Mass ◽  
Acetylenic Ester ◽  
H Nmr

The conjugate addition of an alcohol to a butynoate ester using an organophosphine catalyst was monitored using pressurized sample infusion electrospray ionization mass spectrometry (PSI-ESI-MS), together with 31P and 1H NMR spectroscopy.

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