4fqj

Influenza B/Florida/4/2006 hemagglutinin Fab CR8071 complex

spinqualitylabelsall models 4fqj, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4fqj is a 3 chain structure with sequence from Human and Influenza b virus (b/reassortant/nymc bx-21a(lee/1940 x florida/04/2006)). Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: BMA, NAG Related: 4fnk, 4fqh, 4fqi, 4fqk, 4fql, 4fqm, 4fqv, 4fqy Gene: HA (Influenza B virus (B/reassortant/NYMC BX-21A(Lee/1940 x Florida/04/2006))) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [I0B7N4_9INFB] Binds to sialic acid-containing receptors on the cell surface, bringing about the attachment of the virus particle to the cell. This attachment induces virion internalization of about two third of the virus particles through clathrin-dependent endocytosis and about one third through a clathrin- and caveolin-independent pathway. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induces an irreversible conformational change in HA2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore.[RuleBase:RU003324] Publication Abstract from PubMed Identification of broadly neutralizing antibodies against influenza A viruses has raised hopes for the development of monoclonal antibody-based immunotherapy and "universal" vaccines for influenza. However, a significant part of the annual flu burden is caused by two cocirculating, antigenically distinct lineages of influenza B viruses. Here, we report human monoclonal antibodies, CR8033, CR8071, and CR9114, that protect mice against lethal challenge from both lineages. Antibodies CR8033 and CR8071 recognize distinct conserved epitopes in the head region of the influenza B hemagglutinin (HA), whereas CR9114 binds a conserved epitope in the HA stem and protects against lethal challenge with influenza A and B viruses. These antibodies may inform on development of monoclonal antibody-based treatments and a universal flu vaccine for all influenza A and B viruses. Highly Conserved Protective Epitopes on Influenza B Viruses.,Dreyfus C, Laursen NS, Kwaks T, Zuijdgeest D, Khayat R, Ekiert DC, Lee JH, Metlagel Z, Bujny MV, Jongeneelen M, van der Vlugt R, Lamrani M, Korse HJ, Geelen E, Sahin O, Sieuwerts M, Brakenhoff JP, Vogels R, Li OT, Poon LL, Peiris M, Koudstaal W, Ward AB, Wilson IA, Goudsmit J, Friesen RH Science. 2012 Aug 9. PMID:22878502 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Hemagglutinin

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