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- EMDB-3086: negative stain EM of BG505 SOSIP.664 in complex with sCD4, 17b, a... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-3086 | |||||||||
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Title | negative stain EM of BG505 SOSIP.664 in complex with sCD4, 17b, and 8ANC195 | |||||||||
![]() | negative stain EM single particle analysis. The particles were picked using EMAN2. CTF correction was done using EMAN2. 2D and 3D classification was done using Relion to sort particles. The refinement and gold-standard FSC calculation was done using Relion. | |||||||||
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![]() | HIV-1 Env trimer / broadly neutralizing antibody | |||||||||
Function / homology | ![]() helper T cell enhancement of adaptive immune response / interleukin-16 binding / interleukin-16 receptor activity / maintenance of protein location in cell / T cell selection / MHC class II protein binding / cellular response to granulocyte macrophage colony-stimulating factor stimulus / interleukin-15-mediated signaling pathway / positive regulation of monocyte differentiation / Nef Mediated CD4 Down-regulation ...helper T cell enhancement of adaptive immune response / interleukin-16 binding / interleukin-16 receptor activity / maintenance of protein location in cell / T cell selection / MHC class II protein binding / cellular response to granulocyte macrophage colony-stimulating factor stimulus / interleukin-15-mediated signaling pathway / positive regulation of monocyte differentiation / Nef Mediated CD4 Down-regulation / Alpha-defensins / positive regulation of kinase activity / regulation of T cell activation / T cell receptor complex / extracellular matrix structural constituent / Other interleukin signaling / enzyme-linked receptor protein signaling pathway / Dectin-2 family / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / regulation of calcium ion transport / macrophage differentiation / Generation of second messenger molecules / T cell differentiation / PD-1 signaling / positive regulation of protein kinase activity / Binding and entry of HIV virion / coreceptor activity / positive regulation of calcium-mediated signaling / positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / cell surface receptor protein tyrosine kinase signaling pathway / positive regulation of establishment of T cell polarity / T cell activation / positive regulation of interleukin-2 production / protein tyrosine kinase binding / host cell endosome membrane / Vpu mediated degradation of CD4 / calcium-mediated signaling / clathrin-coated endocytic vesicle membrane / transmembrane signaling receptor activity / positive regulation of peptidyl-tyrosine phosphorylation / Downstream TCR signaling / Cargo recognition for clathrin-mediated endocytosis / positive regulation of T cell activation / MHC class II protein complex binding / Clathrin-mediated endocytosis / virus receptor activity / signaling receptor activity / clathrin-dependent endocytosis of virus by host cell / positive regulation of canonical NF-kappaB signal transduction / defense response to Gram-negative bacterium / adaptive immune response / positive regulation of MAPK cascade / positive regulation of viral entry into host cell / cell surface receptor signaling pathway / positive regulation of ERK1 and ERK2 cascade / early endosome / viral protein processing / cell adhesion / positive regulation of protein phosphorylation / immune response / membrane raft / endoplasmic reticulum lumen / fusion of virus membrane with host plasma membrane / external side of plasma membrane / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / viral envelope / lipid binding / virion attachment to host cell / endoplasmic reticulum membrane / protein kinase binding / host cell plasma membrane / structural molecule activity / virion membrane / positive regulation of DNA-templated transcription / enzyme binding / signal transduction / protein homodimerization activity / zinc ion binding / identical protein binding / membrane / plasma membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | single particle reconstruction / negative staining / Resolution: 16.8 Å | |||||||||
![]() | Scharf L / Wang H / Gao H / Chen S / McDowall A / Bjorkman P | |||||||||
![]() | ![]() Title: Broadly Neutralizing Antibody 8ANC195 Recognizes Closed and Open States of HIV-1 Env. Authors: Louise Scharf / Haoqing Wang / Han Gao / Songye Chen / Alasdair W McDowall / Pamela J Bjorkman / ![]() Abstract: The HIV-1 envelope (Env) spike contains limited epitopes for broadly neutralizing antibodies (bNAbs); thus, most neutralizing antibodies are strain specific. The 8ANC195 epitope, defined by crystal ...The HIV-1 envelope (Env) spike contains limited epitopes for broadly neutralizing antibodies (bNAbs); thus, most neutralizing antibodies are strain specific. The 8ANC195 epitope, defined by crystal and electron microscopy (EM) structures of bNAb 8ANC195 complexed with monomeric gp120 and trimeric Env, respectively, spans the gp120 and gp41 Env subunits. To investigate 8ANC195's gp41 epitope at higher resolution, we solved a 3.58 Å crystal structure of 8ANC195 complexed with fully glycosylated Env trimer, revealing 8ANC195 insertion into a glycan shield gap to contact gp120 and gp41 glycans and protein residues. To determine whether 8ANC195 recognizes the CD4-bound open Env conformation that leads to co-receptor binding and fusion, one of several known conformations of virion-associated Env, we solved EM structures of an Env/CD4/CD4-induced antibody/8ANC195 complex. 8ANC195 binding partially closed the CD4-bound trimer, confirming structural plasticity of Env by revealing a previously unseen conformation. 8ANC195's ability to bind different Env conformations suggests advantages for potential therapeutic applications. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.2 KB 14.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 4.9 KB | Display | ![]() |
Images | ![]() | 1.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 261.7 KB | Display | ![]() |
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Full document | ![]() | 260.8 KB | Display | |
Data in XML | ![]() | 7.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 5a7xMC ![]() 3096C ![]() 5a8hC ![]() 5cjxC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | negative stain EM single particle analysis. The particles were picked using EMAN2. CTF correction was done using EMAN2. 2D and 3D classification was done using Relion to sort particles. The refinement and gold-standard FSC calculation was done using Relion. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 2.5 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : soluble HIV-1 Env trimer BG505 SOSIP.664 in complex with soluble ...
Entire | Name: soluble HIV-1 Env trimer BG505 SOSIP.664 in complex with soluble CD4s (D1-D2), broadly neutralizing antibody 17b Fabs, and broadly neutralizing antibody 8ANC195 variant G32K5 Fabs |
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Components |
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-Supramolecule #1000: soluble HIV-1 Env trimer BG505 SOSIP.664 in complex with soluble ...
Supramolecule | Name: soluble HIV-1 Env trimer BG505 SOSIP.664 in complex with soluble CD4s (D1-D2), broadly neutralizing antibody 17b Fabs, and broadly neutralizing antibody 8ANC195 variant G32K5 Fabs type: sample / ID: 1000 Oligomeric state: 3 Fabs of 17b, 3 sCD4, and 3 Fabs of 8ANC195 G52K5 bind to Env trimer BG505 SOSIP Number unique components: 4 |
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Molecular weight | Theoretical: 500 KDa |
-Macromolecule #1: Soluble HIV-1 Env trimer BG505 SOSIP.664
Macromolecule | Name: Soluble HIV-1 Env trimer BG505 SOSIP.664 / type: protein_or_peptide / ID: 1 / Name.synonym: BG505 SOSIP / Number of copies: 1 / Oligomeric state: trimer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 420 KDa |
Recombinant expression | Organism: ![]() |
-Macromolecule #2: Fab of broadly neutralizing antibody 17b
Macromolecule | Name: Fab of broadly neutralizing antibody 17b / type: protein_or_peptide / ID: 2 / Name.synonym: 17b / Number of copies: 3 / Oligomeric state: monomer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 50 KDa |
Recombinant expression | Organism: ![]() |
-Macromolecule #3: soluble CD4 (D1-D2 domains)
Macromolecule | Name: soluble CD4 (D1-D2 domains) / type: protein_or_peptide / ID: 3 / Name.synonym: sCD4 / Number of copies: 3 / Oligomeric state: monomer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 20 KDa |
Recombinant expression | Organism: ![]() |
-Macromolecule #4: Fab of broadly neutralizing antibody 8ANC195 variant G52K5
Macromolecule | Name: Fab of broadly neutralizing antibody 8ANC195 variant G52K5 type: protein_or_peptide / ID: 4 / Name.synonym: 8ANC195 G52K5 / Number of copies: 3 / Oligomeric state: monomer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 50 KDa |
Recombinant expression | Organism: ![]() |
-Experimental details
-Structure determination
Method | negative staining |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.01 mg/mL |
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Buffer | pH: 8 / Details: 20mM Tris, 50mM NaCl |
Staining | Type: NEGATIVE Details: Grids with adsorbed protein cross-linked by glutaraldehyde vapor and stained by 3% w/v uranyl acetate for 30 seconds. |
Grid | Details: glow discharged ultrathin C film on holey carbon support film, 400 mesh, Cu grids |
Vitrification | Cryogen name: NONE / Instrument: OTHER |
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Electron microscopy
Microscope | FEI TECNAI 12 |
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Date | Apr 7, 2015 |
Image recording | Category: CCD / Film or detector model: GATAN ULTRASCAN 1000 (2k x 2k) / Number real images: 642 |
Electron beam | Acceleration voltage: 120 kV / Electron source: LAB6 |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.2 mm / Nominal magnification: 42000 |
Sample stage | Specimen holder model: SIDE ENTRY, EUCENTRIC |
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Image processing
-Atomic model buiding 1
Initial model | PDB ID: Chain - #0 - Chain ID: G / Chain - #1 - Chain ID: C / Chain - #2 - Chain ID: L / Chain - #3 - Chain ID: H |
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Software | Name: ![]() |
Details | Fitted by manual docking first and then using Chimera with the following options: real-time correlation/average update, and use map simulated from atoms, resolution 15 A |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
Output model | ![]() PDB-5a7x: |
-Atomic model buiding 2
Initial model | PDB ID: Chain - #0 - Chain ID: L / Chain - #1 - Chain ID: H |
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Software | Name: ![]() |
Details | Fitted by manual docking first and then using Chimera with the following options: real-time correlation/average update, and use map simulated from atoms, resolution 15 A |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
Output model | ![]() PDB-5a7x: |