6nc3

AMC011 v4.2 SOSIP Env trimer in complex with fusion peptide targeting antibody VRC34 fragment antigen bindingAMC011 v4.2 SOSIP Env trimer in complex with fusion peptide targeting antibody VRC34 fragment antigen binding

6nc3, resolution 4.50Å Show:Asymmetric Unit Biological Assembly Structural highlights 6nc3 is a 24 chain structure with sequence from Homo sapiens and Human immunodeficiency virus 1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 4.5Å Ligands: Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q78156_9HIV1 Publication Abstract from PubMed The fusion peptide (FP) of HIV-1 envelope glycoprotein (Env) is essential for mediating viral entry. Detection of broadly neutralizing antibodies (bnAbs) that interact with the FP has revealed it as a site of vulnerability. We delineate X-ray and cryo-electron microscopy (cryo-EM) structures of bnAb ACS202, from an HIV-infected elite neutralizer, with an FP and with a soluble Env trimer (AMC011 SOSIP.v4.2) derived from the same patient. We show that ACS202 CDRH3 forms a "beta strand" interaction with the exposed hydrophobic FP and recognizes a continuous region of gp120, including a conserved N-linked glycan at N88. A cryo-EM structure of another previously identified bnAb VRC34.01 with AMC011 SOSIP.v4.2 shows that it also penetrates through glycans to target the FP. We further demonstrate that the FP can twist and present different conformations for recognition by bnAbs, which enables approach to Env from diverse angles. The variable recognition of FP by bnAbs thus provides insights for vaccine design. Conformational Plasticity in the HIV-1 Fusion Peptide Facilitates Recognition by Broadly Neutralizing Antibodies.,Yuan M, Cottrell CA, Ozorowski G, van Gils MJ, Kumar S, Wu NC, Sarkar A, Torres JL, de Val N, Copps J, Moore JP, Sanders RW, Ward AB, Wilson IA Cell Host Microbe. 2019 Jun 12;25(6):873-883.e5. doi: 10.1016/j.chom.2019.04.011. PMID:31194940 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Gp120 3D structures Gp41 3D Structures Immunodeficiency virus protease 3D structures Monoclonal Antibodies 3D structures