Download MendeleyCrystal structure of the receptor-binding domain of adenovirus type 5 fiber protein at 1.7 A resolution.
Xia, D., Henry, L.J., Gerard, R.D., Deisenhofer, J.(1994) Structure 2: 1259-1270
- PubMed: 7704534
- DOI: https://doi.org/10.1016/s0969-2126(94)00126-x
- Primary Citation of Related Structures:
1KNB - PubMed Abstract:
Adenoviral infection begins with the binding of virion to the surface of host cells. Specific attachment is achieved through interactions between host-cell receptors and the adenovirus fiber protein and is mediated by the globular carboxy-terminal domain of the adenovirus fiber protein, termed the carboxy-terminal knob domain. The crystal structure of the carboxy-terminal knob domain of the adenovirus type 5 (Ad5) fiber protein has been determined at 1.7 A resolution. Each knob monomer forms an eight-stranded antiparallel beta-sandwich structure. In the crystal lattice, the knob monomers form closely interacting trimers which possess a deep surface depression centered around the three-fold molecular symmetry axis and three symmetry-related valleys. The amino acid residues lining the wall of the central surface depression and the three symmetry-related floors of the valleys are strictly conserved in the knob domains of Ad5 and adenovirus type 2 (Ad2) fiber proteins, which share the same cellular receptor. The beta-sandwich structure of the knob monomer demonstrates a unique folding topology which is different from that of other known antiparallel beta-sandwich structures. The large buried surface area and numerous polar interactions in the trimer indicate that this form of the knob protein is predominant in solution, suggesting a possible assembly pathway for the native fiber protein.
Organizational Affiliation:
Howard Hughes Medical Institute, University of Texas Southwestern Medical Center at Dallas 75235-9050.
