4n8c

Three-dimensional structure of the extracellular domain of Matrix protein 2 of influenza A virus

spinqualitylabelsall models 4n8c, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4n8c is a 6 chain structure with sequence from Influenza A virus (A/Puerto Rico/8/1934(H1N1)) and Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The extracellular domain of influenza A virus matrix protein 2 (M2e) is conserved and is being evaluated as a quasiuniversal influenza A vaccine candidate. We describe the crystal structure at 1.6 A resolution of M2e in complex with the Fab fragment of an M2e-specific monoclonal antibody that protects against influenza A virus challenge. This antibody binds M2 expressed on the surfaces of cells infected with influenza A virus. Five out of six complementary determining regions interact with M2e, and three highly conserved M2e residues are critical for this interaction. In this complex, M2e adopts a compact U-shaped conformation stabilized in the center by the highly conserved tryptophan residue in M2e. This is the first description of the three-dimensional structure of M2e. IMPORTANCE: M2e of influenza A is under investigation as a universal influenza A vaccine, but its three-dimensional structure is unknown. We describe the structure of M2e stabilized with an M2e-specific monoclonal antibody that recognizes natural M2. We found that the conserved tryptophan is positioned in the center of the U-shaped structure of M2e and stabilizes its conformation. The structure also explains why previously reported in vivo escape viruses, selected with a similar monoclonal antibody, carried proline residue substitutions at position 10 in M2. Structure of the extracellular domain of matrix protein 2 of influenza A virus in complex with a protective monoclonal antibody.,Cho KJ, Schepens B, Seok JH, Kim S, Roose K, Lee JH, Gallardo R, Van Hamme E, Schymkowitz J, Rousseau F, Fiers W, Saelens X, Kim KH J Virol. 2015 Apr;89(7):3700-11. doi: 10.1128/JVI.02576-14. Epub 2015 Jan 21. PMID:25609808 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Monoclonal Antibodies 3D structures

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