CD81 extracellular domain 3D structure: insight into the tetraspanin superfamily structural motifs.
Kitadokoro, K., Bordo, D., Galli, G., Petracca, R., Falugi, F., Abrignani, S., Grandi, G., Bolognesi, M.(2001) EMBO J 20: 12-18
- PubMed: 11226150 
- DOI: 10.1093/emboj/20.1.12
- Primary Citation of Related Structures:  
1G8Q - PubMed Abstract: 
Human CD81, a known receptor for hepatitis C virus envelope E2 glycoprotein, is a transmembrane protein belonging to the tetraspanin family. The crystal structure of human CD81 large extracellular domain is reported here at 1.6 A resolution. Each subunit within the homodimeric protein displays a mushroom-like structure, composed of five alpha-helices arranged in 'stalk' and 'head' subdomains ...