PMID:1304894
| Citation |
Binnie, RA, Zhang, H, Mowbray, S and Hermodson, MA (1992) Functional mapping of the surface of Escherichia coli ribose-binding protein: mutations that affect chemotaxis and transport. Protein Sci. 1:1642-51 |
|---|---|
| Abstract |
Ribose-binding protein is a bifunctional soluble receptor found in the periplasm of Escherichia coli. Interaction of liganded binding protein with the ribose high affinity transport complex results in the transfer of ribose across the cytoplasmic membrane. Alternatively, interaction of liganded binding protein with a chemotactic signal transducer, Trg, initiates taxis toward ribose. We have generated a functional map of the surface of ribose-binding protein by creating and analyzing directed mutations of exposed residues. Residues in an area on the cleft side of the molecule including both domains have effects on transport. A portion of the area involved in transport is also essential to chemotactic function. On the opposite face of the protein, mutations in residues near the hinge are shown to affect chemotaxis specifically. |
| Links |
PubMed PMC2142133 Online version:10.1002/pro.5560011212 |
| Keywords |
Biological Transport; Carrier Proteins/chemistry; Carrier Proteins/genetics; Carrier Proteins/metabolism; Chemotaxis; Escherichia coli/genetics; Escherichia coli/metabolism; Escherichia coli/physiology; Escherichia coli Proteins; Genes, Bacterial; Models, Structural; Mutagenesis, Site-Directed; Operon; Periplasmic Binding Proteins; Protein Structure, Secondary; Ribose/metabolism |
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