1VPS

POLYOMAVIRUS VP1 PENTAMER COMPLEXED WITH A DISIALYLATED HEXASACCHARIDE

Summary for 1VPS

• Entry DOI: 10.2210/pdb1vps/pdb
• Descriptor: POLYOMAVIRUS VP1 PENTAMER, N-acetyl-alpha-neuraminic acid-(2-3)-beta-D-galactopyranose-(1-3)-[N-acetyl-alpha-neuraminic acid-(2-6)]2-acetamido-2-deoxy-beta-D-glucopyranose (3 entities in total)
• Functional Keywords: virus coat protein, oligosaccharide binding, virus assembly, sialic acid, viral protein
• Biological source: Murine polyomavirus
• Cellular location: Virion: P49302
• Total number of polymer chains: 5
• Total formula weight: 165265.36

Authors

Stehle, T.,Harrison, S.C. (deposition date: 1997-03-07, release date: 1997-05-15, Last modification date: 2024-05-22)

Primary citation

Stehle, T.,Harrison, S.C.
High-resolution structure of a polyomavirus VP1-oligosaccharide complex: implications for assembly and receptor binding.
Embo J., 16:5139-5148, 1997

PubMed Abstract: The crystal structure of a recombinant polyomavirus VP1 pentamer (residues 32-320) in complex with a branched disialylated hexasaccharide receptor fragment has been determined at 1.9 A resolution. The result extends our understanding of oligosaccharide receptor recognition. It also suggests a mechanism for enhancing the fidelity of virus assembly. We have previously described the structure of the complete polyomavirus particle complexed with this receptor fragment at 3.65 A. The model presented here offers a much more refined view of the interactions that determine carbohydrate recognition and allows us to assign additional specific contacts, in particular those involving the (alpha2,6)-linked, branching sialic acid. The structure of the unliganded VP1 pentamer, determined independently, shows that the oligosaccharide fits into a preformed groove and induces no measurable structural rearrangements. A comparison with assembled VP1 in the virus capsid reveals a rearrangement of residues 32-45 at the base of the pentamer. This segment may help prevent the formation of incorrectly assembled particles by reducing the likelihood that the C-terminal arm will fold back into its pentamer of origin.

PubMed: 9305654
DOI: 10.1093/emboj/16.16.5139

Experimental method

X-RAY DIFFRACTION (1.9 Å)