Extensive features of tight oligosaccharide binding revealed in high-resolution structures of the maltodextrin transport/chemosensory receptor.Quiocho, F.A., Spurlino, J.C., Rodseth, L.E.
(1997) Structure 5: 997-1015
- PubMed: 9309217
- DOI: https://doi.org/10.1016/s0969-2126(97)00253-0
- Primary Citation of Related Structures:
1ANF, 3MBP, 4MBP
- PubMed Abstract:
Active-transport processes perform a vital function in the life of a cell, maintaining cell homeostasis and allowing access of nutrients. Maltodextrin/maltose-binding protein (MBP; M(r) = 40k) is a receptor protein which serves as an initial high-affinity binding component of the active-transport system of maltooligosaccharides in bacteria. MBP also participates in chemotaxis towards maltooligosaccharides. The interaction between MBP and specific cytoplasmic membrane proteins initiates either active transport or chemotaxis. In order to gain new understanding of the function of MBP, especially its versatility in binding different linear and cyclic oligosaccharides with similar affinities, we have undertaken high-resolution X-ray analysis of three oligosaccharide-bound structures.
Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA. email@example.com