Metal binding studies

Few studies have evaluated the potential for use of microorganisms in the remediation of sea water however, the problems encountered are similar to those of other aquatic systems. Stupakova et al. (1988) proposed the use of the marine bacteria Deleya venustus and Moraxella sp. for copper uptake from sea water. Additionally, Corpe (1975) performed metal-binding studies with copper using exopolymer from film-producing marine bacteria and found that insoluble copper precipitates formed, effectively decreasing copper toxicity. 

Larsson-Raznikiewicz, M., and B. G. Malmstrdm The metal-ion activation of 3-phosphoglycerate kinase in correlation with metal binding studies. Arch. Biochem. Biophys. 92, 94 (1961). 

A new synthesis of oxacalix[3]arene macrocycles and alkali-metal-binding studies, R D. Hampton, Z. Bencze, W. D. Tong and C. E. Daitch, J. Org. Chem., 1994,59,4838. 

Previous studies have reported silver staining with other amino acids. Heukeshoven and Dernick reported silver staining of the homopolymers of glycine, serine, proline and aspartic acid (4 ) while Nielsen and Brown reported the formation of colored silver complexes with aspartate, and tyrosine (45,). Staining of these homopolymers was not observed in the study of Merril and Pratt (32,), and prior metal binding studies failed to demonstrate metal interactions with the side-chain hydroxyl groups of serine, threonine or tyrosine... 

Figure 31. A model system developed by Parkin and co-workers (a), Tris(2-mercapto-l-phenylimidazolyl)hydroborato lead complex, [Tm ]Pb [C104] (197), is strikingly similar in structure to the lead bound in the active site of the target protein ALAD (b), (only lead and coordinated cysteines are shown) (245). In both systems, lead is bound in a trigonal pyramidal geometry by three sulfurs. Metal-binding studies on the model system (198) and inhibition studies on the enzyme reveal that lead has a higher affinity for this type of site than the native zinc ion. [Part (a) reprinted with permission from B. M. Bridgewater and G. Parkin, J. Am. Chem. Soc., 122, 7140-7141 (2000). Copyright 1999 American Chemical Society. Coordinates for figure part b) were downloaded from the Protein Databank (pdb file id IQNV).]...

Metal Binding Studies of Ferrocene Peptides in Solution... 

Atactic PSSA is soluble in water, methanol, and ethanol but insoluble in hydrocarbons. PSSA salts are insoluble in common organic solvents but soluble in water. Ultraviolet and fluorescence spectrometry measurements can yield information on features including local environment, neighboring groups, and tacticity. MHS values and solution properties are reviewed in Reference 56. Cross-linked PSSA has been used commercially as an ion-exchange resin and in heavy metal binding studies. Fractionated PSSA has been offered as a standard for aqueous gel-permeation chromatography... 

Previously, McCarthy investigated whether the deprotonation of a histidine residue in the vicinity of the active site, His81 or His 217, can be attributed to pKai using the HisSlAla and His217Ala mutants for the metal binding studies [14]. While for the His217Ala mutant pKai was still present when titrating Zn(Il) into the Fe(n) half-apo enzyme, no apparent pH dependence was observed for the HisSlAla mutant (Fig. 3.11, Table 3.3). Thus, pK i was attributed to this histidine residue [14],... 

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