Structure of DsbC from Haemophilus influenzae.Zhang, M., Monzingo, A.F., Segatori, L., Georgiou, G., Robertus, J.D.
(2004) Acta Crystallogr D Biol Crystallogr 60: 1512-1518
- PubMed: 15333920
- DOI: https://doi.org/10.1107/S0907444904014593
- Primary Citation of Related Structures:
- PubMed Abstract:
Bacterial DsbC proteins are involved in rearranging or reducing mismatched disulfide bonds folding within the periplasm. The X-ray structure of the enzyme from Haemophilus influenzae has been solved and compared with the known structure of the Escherichia coli protein. The proteins act as V-shaped dimers with a large cleft to accommodate substrate proteins. The dimers are anchored by a small N-terminal domain, but have a flexible linker region which allows the larger C-terminal domain, with its reactive sulfhydryls, to clamp down on substrates. The overall folds are very similar, but the comparison shows a wider range of hinge motions than previously thought. The crystal packing of the H. influenzae protein allows the movement of the N-terminal domain with respect to the C-terminal domain through motions in the flexible hinge, generating high thermal parameters and unusually high anisotropy in the crystallographic data.
Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, 1 University Station, University of Texas at Austin, Austin, TX 78712, USA.