Download MendeleyCrystallographic Structure of SurA, a Molecular Chaperone that Facilitates Folding of Outer Membrane Porins
Bitto, E., McKay, D.B.(2002) Structure 10: 1489-1498
- PubMed: 12429090
- DOI: https://doi.org/10.1016/s0969-2126(02)00877-8
- Primary Citation of Related Structures:
1M5Y - PubMed Abstract:
The SurA protein facilitates correct folding of outer membrane proteins in gram-negative bacteria. The sequence of Escherichia coli SurA presents four segments, two of which are peptidyl-prolyl isomerases (PPIases); the crystal structure reveals an asymmetric dumbbell, in which the amino-terminal, carboxy-terminal, and first PPIase segments of the sequence form a core structural module, and the second PPIase segment is a satellite domain tethered approximately 30 A from this module. The core module, which is implicated in membrane protein folding, has a novel fold that includes an extended crevice. Crystal contacts show that peptides bind within the crevice, suggesting a model for chaperone activity whereby segments of polypeptide may be repetitively sequestered and released during the membrane protein-folding process.
Organizational Affiliation:
Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.
