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McsA and the roles of metal-binding motif in Staphylococcus aureus.
- Source :
-
FEMS microbiology letters [FEMS Microbiol Lett] 2012 Feb; Vol. 327 (2), pp. 126-33. Date of Electronic Publication: 2011 Dec 20. - Publication Year :
- 2012
-
Abstract
- McsA is a key modulator of stress response in Staphylococcus aureus that contains four CXXC potential metal-binding motifs at the N-terminal. Staphylococcus aureus ctsR operon encodes ctsR, clpC, and putative mcsA and mcsB genes. The expression of the ctsR operon in S. aureus was shown to be induced in response to various types of heavy metals such as copper and cadmium. McsA was cloned and overexpressed, and purified product was tested for metal-binding activity. The protein bound to Cu(II), Zn(II), Co(II), and Cd(II). No binding with any heavy metal except copper was found when we performed site-directed mutagenesis of Cys residues of three CXXC motifs of McsA. These data suggest that two conserved cysteine ligands provided by one CXXC motif are required to bind copper ions. In addition, using a bacterial two-hybrid system, McsA was found to be able to bind to McsB and CtsR of S. aureus and the CXXC motif was needed for the binding. This indicates that the Cys residues in the CXXC motif are involved in metal binding and protein interaction.<br /> (© 2011 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.)
- Subjects :
- Amino Acid Motifs
Bacterial Proteins genetics
Binding Sites
Cadmium metabolism
Copper metabolism
Gene Expression Regulation, Bacterial
Molecular Sequence Data
Protein Binding
Staphylococcus aureus chemistry
Staphylococcus aureus genetics
Bacterial Proteins chemistry
Bacterial Proteins metabolism
Metals, Heavy metabolism
Staphylococcus aureus metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1574-6968
- Volume :
- 327
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- FEMS microbiology letters
- Publication Type :
- Academic Journal
- Accession number :
- 22126623
- Full Text :
- https://doi.org/10.1111/j.1574-6968.2011.02468.x