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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cheung, Jonah Hendrickson, Wayne A. |
| Description | Author Affiliation: Cheung J ( Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032, USA.) |
| Abstract | Two-component signaling systems allow bacteria to adapt to changing environments. Typically, a chemical or other stimulus is detected by the periplasmic sensor domain of a transmembrane histidine kinase sensor, which in turn relays a signal through a phosphotransfer cascade to the cognate cytoplasmic response regulator. Such systems lead ultimately to changes in gene expression or cell motility. Mechanisms of ligand binding and signal transduction through the cell membrane in histidine kinases are not fully understood. In an effort to further understand such processes, we have solved the crystal structures of the periplasmic sensor domains of Escherichia coli DcuS and of Vibrio cholerae DctB in complex with the respective cognate ligands, malate and succinate. Both proteins are involved in the regulation of the transport and metabolism of C(4)-dicarboxylates, but they are not highly related by sequence similarity. Our work reveals that despite disparate sizes, both structures contain a similar characteristic alpha/beta PDC (PhoQ-DcuS-CitA) sensor-domain fold and display similar modes of ligand binding, suggesting similar mechanisms of function. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 44 |
| Volume Number | 283 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2008-10-31 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Carboxylic Acids Chemistry Escherichia Coli Proteins Escherichia Coli Metabolism Protein Kinases Vibrio Cholerae Amino Acid Sequence Cloning, Molecular Crystallography, X-Ray Ligands Models, Biological Molecular Sequence Data Protein Binding Protein Structure, Tertiary Sequence Homology, Amino Acid X-Ray Diffraction Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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