Download MendeleyStructure of a conserved Golgi complex-targeting signal in coronavirus envelope proteins.
Li, Y., Surya, W., Claudine, S., Torres, J.(2014) J Biol Chem 289: 12535-12549
- PubMed: 24668816
- DOI: https://doi.org/10.1074/jbc.M114.560094
- Primary Citation of Related Structures:
2MM4 - PubMed Abstract:
Coronavirus envelope (CoV E) proteins are ∼100-residue polypeptides with at least one channel-forming α-helical transmembrane (TM) domain. The extramembrane C-terminal tail contains a completely conserved proline, at the center of a predicted β-coil-β motif. This hydrophobic motif has been reported to constitute a Golgi-targeting signal or a second TM domain. However, no structural data for this or other extramembrane domains in CoV E proteins is available. Herein, we show that the E protein in the severe acute respiratory syndrome virus has only one TM domain in micelles, whereas the predicted β-coil-β motif forms a short membrane-bound α-helix connected by a disordered loop to the TM domain. However, complementary results suggest that this motif is potentially poised for conformational change or in dynamic exchange with other conformations.
Organizational Affiliation:
From the School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, 637551 Singapore.
