Title : Oxidative modification of a carboxyl-terminal vicinal methionine in calmodulin by hydrogen peroxide inhibits calmodulin-dependent activation of the plasma membrane Ca-ATPase.

Pub. Date : 1996 Feb 27

PMID : 8611584






18 Functional Relationships(s)
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1 Oxidative modification of a carboxyl-terminal vicinal methionine in calmodulin by hydrogen peroxide inhibits calmodulin-dependent activation of the plasma membrane Ca-ATPase. vicinal methionine CaM5 Triticum aestivum
2 Oxidative modification of a carboxyl-terminal vicinal methionine in calmodulin by hydrogen peroxide inhibits calmodulin-dependent activation of the plasma membrane Ca-ATPase. vicinal methionine CaM5 Triticum aestivum
3 Oxidative modification of a carboxyl-terminal vicinal methionine in calmodulin by hydrogen peroxide inhibits calmodulin-dependent activation of the plasma membrane Ca-ATPase. Hydrogen Peroxide CaM5 Triticum aestivum
4 Oxidative modification of a carboxyl-terminal vicinal methionine in calmodulin by hydrogen peroxide inhibits calmodulin-dependent activation of the plasma membrane Ca-ATPase. Hydrogen Peroxide CaM5 Triticum aestivum
5 In order to investigate the possibility that calmodulin (CaM) may be a principal target of reactive oxygen species (ROS) produced under conditions of oxidative stress, we have examined wheat germ CaM for the presence of highly reactive sites that correlate with the loss of function. Reactive Oxygen Species CaM5 Triticum aestivum
6 In order to investigate the possibility that calmodulin (CaM) may be a principal target of reactive oxygen species (ROS) produced under conditions of oxidative stress, we have examined wheat germ CaM for the presence of highly reactive sites that correlate with the loss of function. Reactive Oxygen Species CaM5 Triticum aestivum
7 In order to investigate the possibility that calmodulin (CaM) may be a principal target of reactive oxygen species (ROS) produced under conditions of oxidative stress, we have examined wheat germ CaM for the presence of highly reactive sites that correlate with the loss of function. Reactive Oxygen Species CaM5 Triticum aestivum
8 In order to investigate the possibility that calmodulin (CaM) may be a principal target of reactive oxygen species (ROS) produced under conditions of oxidative stress, we have examined wheat germ CaM for the presence of highly reactive sites that correlate with the loss of function. Reactive Oxygen Species CaM5 Triticum aestivum
9 We find that one of the vicinal methionines (i.e., Met146 or Met147) near the C-terminus of CaM is selectively oxidized. vicinal CaM5 Triticum aestivum
10 We find that one of the vicinal methionines (i.e., Met146 or Met147) near the C-terminus of CaM is selectively oxidized. Methionine CaM5 Triticum aestivum
11 There is a 30-fold decrease in the calcium affinity of oxidatively modified CaM. Calcium CaM5 Triticum aestivum
12 While there is a little change in the binding constant between the carboxyl-terminal domain of calcium-saturated CaM and a peptide homologous to the autoinhibitory sequence of the PM-Ca-ATPase, we find that there is a 9-fold reduction in the affinity of the amino-terminal domain of CaM with respect to the ability to bind target peptides. Calcium CaM5 Triticum aestivum
13 While there is a little change in the binding constant between the carboxyl-terminal domain of calcium-saturated CaM and a peptide homologous to the autoinhibitory sequence of the PM-Ca-ATPase, we find that there is a 9-fold reduction in the affinity of the amino-terminal domain of CaM with respect to the ability to bind target peptides. Calcium CaM5 Triticum aestivum
14 The extent of oxidative modification to one of the vicinal methionines near the carboxyl-terminal domain correlates with the loss of CaM-dependent activation of the PM-Ca-ATPase. Methionine CaM5 Triticum aestivum
15 We suggest that the functional sensitivity of CaM to the oxidation of one of the C-terminal vicinal methionines permits CAM to serve a regulatory role in modulating cellular metabolism under conditions of oxidative stress. vicinal methionines CaM5 Triticum aestivum
16 We suggest that the functional sensitivity of CaM to the oxidation of one of the C-terminal vicinal methionines permits CAM to serve a regulatory role in modulating cellular metabolism under conditions of oxidative stress. vicinal methionines CaM5 Triticum aestivum
17 The predominant oxidation of a methionine near the carboxyl terminal of CaM is rationalized in terms of the enhanced solvent accessibility of these vicinal methionines. Methionine CaM5 Triticum aestivum
18 The predominant oxidation of a methionine near the carboxyl terminal of CaM is rationalized in terms of the enhanced solvent accessibility of these vicinal methionines. vicinal methionines CaM5 Triticum aestivum