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 ...
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.
Related Citations:
Crystallization and Preliminary X-Ray Diffraction Analysis of Scry, a Specific Bacterial Outer Membrane Porin Forst, D., Schulein, K., Wacker, T., Diederichs, K., Kreutz, W., Benz, R., Welte, W. (1993) J Mol Biol 229: 258
Organizational Affiliation:
Institut für Biophysik und Strahlenbiologie, Albert-Ludwigs-Universität, Freiburg im Breisgau, Germany.
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