Download MendeleyStructure of the sucrose-specific porin ScrY from Salmonella typhimurium and its complex with sucrose.
Forst, D., Welte, W., Wacker, T., Diederichs, K.(1998) Nat Struct Biol 5: 37-46
- PubMed: 9437428
- DOI: https://doi.org/10.1038/nsb0198-37
- Primary Citation of Related Structures:
1A0S, 1A0T - PubMed Abstract:
The X-ray structure of a sucrose-specific porin (ScrY) from Salmonella typhimurium has been determined by multiple isomorphous replacement at 2.4 A resolution both in its uncomplexed form and with bound sucrose. ScrY is a noncrystallographic trimer of identical subunits, each with 413 structurally well-defined amino acids. A monomer is built up of 18 anti-parallel beta-strands surrounding a hydrophilic pore, with a topology closely similar to that of maltoporin. Two non-overlapping sucrose-binding sites were identified in difference Fourier maps. The higher permeability for sucrose of ScrY as compared to maltoporin is mainly accounted for by differences in their pore-lining residues.
Organizational Affiliation:
Institut für Biophysik und Strahlenbiologie, Albert-Ludwigs-Universität, Freiburg im Breisgau, Germany.
