The role of metal ion-ligand interactions during divalent metal ion adsorption

2015 ◽  
Vol 454 ◽  
pp. 20-26 ◽  
Author(s):  
Daniel S. Eldridge ◽  
Russell J. Crawford ◽  
Ian H. Harding
Keyword(s):  
Metal Ion ◽  
Divalent Metal ◽  
Ion Adsorption ◽  
Metal Ion Adsorption ◽  
Ligand Interactions ◽  
Divalent Metal Ion

scholarly journals Probing the role of the divalent metal ion in uteroferrin using metal ion replacement and a comparison to isostructural biomimetics

2007 ◽  
Vol 13 (1) ◽  
pp. 139-155 ◽  
Author(s):  
Gerhard Schenk ◽  
Rosely A. Peralta ◽  
Suzana Cimara Batista ◽  
Adailton J. Bortoluzzi ◽  
Bruno Szpoganicz ◽  
...  
Keyword(s):  
Metal Ion ◽  
Divalent Metal ◽  
Divalent Metal Ion

Role of the Divalent Metal Ion in Sugar Binding, Ring Opening, and Isomerization by D-Xylose Isomerase: Replacement of a Catalytic Metal by an Amino Acid

Biochemistry ◽  
1994 ◽  
Vol 33 (6) ◽  
pp. 1488-1494 ◽  
Author(s):  
Karen N. Allen ◽  
Arnon Lavie ◽  
Arthur Glasfeld ◽  
Timothy N. Tanada ◽  
Daniel P. Gerrity ◽  
...  
Keyword(s):  
Amino Acid ◽  
Ring Opening ◽  
Metal Ion ◽  
Xylose Isomerase ◽  
Divalent Metal ◽  
Sugar Binding ◽  
Divalent Metal Ion ◽  
Catalytic Metal

A novel phosphagen phosphotransferase in the plerocercoids of Schistocephalus solidus (Cestoda: Pseudophyllidea)

Parasitology ◽  
1981 ◽  
Vol 82 (1) ◽  
pp. 11-16 ◽  
Author(s):  
J. Barrett ◽  
G. M. Lloyd
Keyword(s):  
Metal Ion ◽  
Fasciola Hepatica ◽  
Divalent Metal ◽  
Hymenolepis Diminuta ◽  
Ligula Intestinalis ◽  
Schistocephalus Solidus ◽  
Absolute Requirement ◽  
Phosphate Donor ◽  
Divalent Metal Ion

SUMMARYNeither phosphagens nor phosphagen phosphotransferase activity could be detected in Fasciola hepatica, Hymenolepis diminuta, Moniezia expansa or in the plerocercoids of Ligula intestinalis. The plerocercoids of Schistocephalus solidus, however, possess an active taurocyamine phosphotransferase, although it too contains no detectable phosphagens. The taurocyamine phosphotransferase of S. solidus has an absolute requirement for a divalent metal ion and ATP could not be replaced by ITP, GTP, CTP, or UTP as the phosphate donor. The role of phosphagens in helminths is discussed.

Effect of exopolysaccharides on the adsorption of metal ions by Pseudomonas sp. CU-1

2005 ◽  
Vol 52 (7) ◽  
pp. 63-68 ◽  
Author(s):  
T.C. Lau ◽  
X.A. Wu ◽  
H. Chua ◽  
P.Y. Qian ◽  
P.K. Wong
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Broth Culture ◽  
Ion Adsorption ◽  
Bacterial Cells ◽  
Pseudomonas Sp ◽  
Adsorption Ability ◽  
Metal Ion Adsorption ◽  
Surrounding Environment

Pseudomonas sp. CU-1, which was isolated from an interfacial biofilm of a sludge sample collected from an electroplating company, had a relatively high ability to adsorb Cu2 +  in solution. The bacterium grown in broth culture produced a large amount of capsular exopolymers mainly consisting of polysaccharides. The exopolysaccharides (EPS) were partially purified. The adsorption isotherm experiments showed that cells and EPS of Pseudomonas sp. CU-1 had similar Q0 and b for the dye, Janus Green, and Cu2+. The adsorption of Cu2 +  by cells could be monitored by the amount of dye displaced, due to the binding of metal ions onto the cell surface. The order of adsorption ability of metal ions and dye displacement by metal ion of the bacterium was: Cu2 + > Cd2 + > Zn2 + > Ni2 + . The results of the dye displacement by metal ions binding onto the surfaces of cells, EPS-removed cells, and EPS suggest that EPS produced by Pseudomonas sp. CU-1 plays an important role in preventing metal ions in the surrounding environment from contact with the bacterial cells. The possible role of the metal ion adsorption by the EPS of this biofilm bacterium was discussed.

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