Download MendeleyCrystal Structure of Human Herpesvirus 6B Tegument Protein U14.
Wang, B., Nishimura, M., Tang, H., Kawabata, A., Mahmoud, N.F., Khanlari, Z., Hamada, D., Tsuruta, H., Mori, Y.(2016) PLoS Pathog 12: e1005594-e1005594
- PubMed: 27152739
- DOI: https://doi.org/10.1371/journal.ppat.1005594
- Primary Citation of Related Structures:
5B1Q - PubMed Abstract:
The tegument protein U14 of human herpesvirus 6B (HHV-6B) constitutes the viral virion structure and is essential for viral growth. To define the characteristics and functions of U14, we determined the crystal structure of the N-terminal domain of HHV-6B U14 (U14-NTD) at 1.85 Å resolution. U14-NTD forms an elongated helix-rich fold with a protruding β hairpin. U14-NTD exists as a dimer exhibiting broad electrostatic interactions and a network of hydrogen bonds. This is first report of the crystal structure and dimerization of HHV-6B U14. The surface of the U14-NTD dimer reveals multiple clusters of negatively- and positively-charged residues that coincide with potential functional sites of U14. Three successive residues, L424, E425 and V426, which relate to viral growth, reside on the β hairpin close to the dimer's two-fold axis. The hydrophobic side-chains of L424 and V426 that constitute a part of a hydrophobic patch are solvent-exposed, indicating the possibility that the β hairpin region is a key functional site of HHV-6 U14. Structure-based sequence comparison suggests that U14-NTD corresponds to the core fold conserved among U14 homologs, human herpesvirus 7 U14, and human cytomegalovirus UL25 and UL35, although dimerization appears to be a specific feature of the U14 group.
Organizational Affiliation:
Division of Clinical Virology, Kobe University Graduate School of Medicine, Kobe, Japan.
