scholarly journals Role of the Iron Axial Ligands of Heme Carrier HasA in Heme Uptake and Release

2012 ◽  
Vol 287 (32) ◽  
pp. 26932-26943 ◽  
Author(s):  
Célia Caillet-Saguy ◽  
Mario Piccioli ◽  
Paola Turano ◽  
Gudrun Lukat-Rodgers ◽  
Nicolas Wolff ◽  
...  
Keyword(s):  
Heme Uptake ◽  
Axial Ligands ◽  
Uptake And Release

scholarly journals Role of the iron axial ligands of heme carrier HasA in heme uptake and release.

2013 ◽  
Vol 288 (4) ◽  
pp. 2190-2190 ◽  
Author(s):  
Célia Caillet-Saguy ◽  
Mario Piccioli ◽  
Paola Turano ◽  
Gudrun Lukat-Rodgers ◽  
Nicolas Wolff ◽  
...  
Keyword(s):  
Heme Uptake ◽  
Axial Ligands ◽  
Uptake And Release

The Role of Equatorial and Axial Ligands in Promoting the Activity of Non-Heme Oxidoiron(IV) Catalysts in Alkane Hydroxylation

2007 ◽  
Vol 2007 (19) ◽  
pp. 3023-3033 ◽  
Author(s):  
Leonardo Bernasconi ◽  
Manuel J. Louwerse ◽  
Evert Jan Baerends
Keyword(s):  
Axial Ligands ◽  
Alkane Hydroxylation

On the role of the axial ligands in heme-based catalysis

1995 ◽  
Vol 59 (2-3) ◽  
pp. 490
Author(s):  
I.M.C.M. Rietjens ◽  
J. Spee ◽  
R. Weiss ◽  
A.X. Trautwein ◽  
W. Van Dongen ◽  
...  
Keyword(s):  
Axial Ligands

Modeling of Ca2+ flux in pancreatic β-cells: role of the plasma membrane and intracellular stores

2003 ◽  
Vol 285 (1) ◽  
pp. E138-E154 ◽  
Author(s):  
Leonid E. Fridlyand ◽  
Natalia Tamarina ◽  
Louis H. Philipson
Keyword(s):  
Plasma Membrane ◽  
Calcium Oscillations ◽  
Β Cells ◽  
Β Cell ◽  
Pancreatic Β Cells ◽  
Ionic Flux ◽  
Inositol 1,4,5 Trisphosphate ◽  
Intracellular Ca ◽  
Uptake And Release

We have developed a detailed mathematical model of ionic flux in β-cells that includes the most essential channels and pumps in the plasma membrane. This model is coupled to equations describing Ca2+, inositol 1,4,5-trisphosphate (IP3), ATP, and Na+ homeostasis, including the uptake and release of Ca2+ by the endoplasmic reticulum (ER). In our model, metabolically derived ATP activates inward Ca2+ flux by regulation of ATP-sensitive K+ channels and depolarization of the plasma membrane. Results from the simulations support the hypothesis that intracellular Na+ and Ca2+ in the ER can be the main variables driving both fast (2–7 osc/min) and slow intracellular Ca2+ concentration oscillations (0.3–0.9 osc/min) and that the effect of IP3 on Ca2+ leak from the ER contributes to the pattern of slow calcium oscillations. Simulations also show that filling the ER Ca2+ stores leads to faster electrical bursting and Ca2+ oscillations. Specific Ca2+ oscillations in isolated β-cell lines can also be simulated.

Novel Heme Ligand Displacement by CO in the Soluble Hemophore HasA and Its Proximal Ligand Mutants:  Implications for Heme Uptake and Release†

Biochemistry ◽  
2008 ◽  
Vol 47 (7) ◽  
pp. 2087-2098 ◽  
Author(s):  
Gudrun S. Lukat-Rodgers ◽  
Kenton R. Rodgers ◽  
Celia Caillet-Saguy ◽  
Nadia Izadi-Pruneyre ◽  
Anne Lecroisey
Keyword(s):  
Heme Uptake ◽  
Ligand Displacement ◽  
Uptake And Release

scholarly journals Role of redox-active axial ligands of metal porphyrins adsorbed at solid–liquid interfaces in a liquid-STM setup

2020 ◽  
Vol 11 ◽  
pp. 1264-1271
Author(s):  
Thomas Habets ◽  
Sylvia Speller ◽  
Johannes A A W Elemans
Keyword(s):  
Tunneling Current ◽  
Liquid Interfaces ◽  
Manganese Porphyrins ◽  
Metal Porphyrins ◽  
Axial Ligands ◽  
Redox Active ◽  
Conductive Surface ◽  
Solid Liquid ◽  
Porphyrin Moiety

In a liquid-STM setup environment, the redox behavior of manganese porphyrins was studied at various solid–liquid interfaces. In the presence of a solution of Mn(III)Cl porphyrins in 1-phenyloctane, which was placed at a conductive surface, large and constant additional currents relative to a set tunneling current were observed, which varied with the magnitude of the applied bias voltage. These currents occurred regardless of the type of surface (HOPG or Au(111)) or tip material (PtIr, Au or W). The additional currents were ascribed to the occurrence of redox reactions in which chloride is oxidized to chlorine and the Mn(III) center of the porphyrin moiety is reduced to Mn(II). The resulting Mn(II) porphyrin products were identified by UV–vis analysis of the liquid phase. For solutions of Mn(III) porphyrins with non-redox active acetate instead of chloride axial ligands, the currents remained absent.

Role of Heme Axial Ligands in the Conformational Stability of the Native and Molten Globule States of Horse Cytochromec

1996 ◽  
Vol 256 (1) ◽  
pp. 172-186 ◽  
Author(s):  
Daizo Hamada ◽  
Yutaka Kuroda ◽  
Mikio Kataoka ◽  
Saburo Aimoto ◽  
Tetsuro Yoshimura ◽  
...  
Keyword(s):  
Molten Globule ◽  
Conformational Stability ◽  
Axial Ligands
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