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- EMDB-22049: Asymmetric reconstruction of CD4- and 17b-bound B41 HIV-1 Env SOS... -

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Entry
Database: EMDB / ID: EMD-22049
TitleAsymmetric reconstruction of CD4- and 17b-bound B41 HIV-1 Env SOSIP in complex with small molecule GO52
Map datasharpened map
Sample
  • Complex: B41 HIV-1 Env SOSIP in complex with soluble CD4, 17b Fab, and small molecule GO52
    • Protein or peptide: Envelope glycoprotein gp160
    • Protein or peptide: Envelope glycoprotein gp41
    • Protein or peptide: T-cell surface glycoprotein CD4
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: N-(4'-methyl[1,1'-biphenyl]-4-yl)-1-oxa-7-azaspiro[3.5]nonane-7-carboxamide
KeywordsHIV-1 / Env / CD4 / receptor-bound state / small molecule / VIRAL PROTEIN / VIRAL PROTEIN-Immune System complex
Function / homology
Function and homology information


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 / interleukin-15-mediated signaling pathway / cellular response to granulocyte macrophage colony-stimulating factor stimulus / positive regulation of kinase activity / positive regulation of monocyte differentiation ...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 / interleukin-15-mediated signaling pathway / cellular response to granulocyte macrophage colony-stimulating factor stimulus / positive regulation of kinase activity / positive regulation of monocyte differentiation / Nef Mediated CD4 Down-regulation / Alpha-defensins / regulation of T cell activation / extracellular matrix structural constituent / T cell receptor complex / Other interleukin signaling / enzyme-linked receptor protein signaling pathway / 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 plasma membrane raft polarization / cell surface receptor protein tyrosine kinase signaling pathway / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / positive regulation of interleukin-2 production / positive regulation of calcium-mediated signaling / protein tyrosine kinase binding / host cell endosome membrane / T cell activation / Vpu mediated degradation of CD4 / calcium-mediated signaling / clathrin-coated endocytic vesicle membrane / positive regulation of peptidyl-tyrosine phosphorylation / positive regulation of T cell activation / transmembrane signaling receptor activity / Downstream TCR signaling / Cargo recognition for clathrin-mediated endocytosis / MHC class II protein complex binding / Clathrin-mediated endocytosis / signaling receptor activity / virus receptor activity / clathrin-dependent endocytosis of virus by host cell / defense response to Gram-negative bacterium / positive regulation of canonical NF-kappaB signal transduction / adaptive immune response / positive regulation of MAPK cascade / positive regulation of ERK1 and ERK2 cascade / positive regulation of viral entry into host cell / early endosome / cell surface receptor signaling pathway / viral protein processing / cell adhesion / immune response / positive regulation of protein phosphorylation / membrane raft / endoplasmic reticulum lumen / external side of plasma membrane / fusion of virus membrane with host plasma membrane / virus-mediated perturbation of host defense response / fusion of virus membrane with host endosome membrane / lipid binding / viral envelope / endoplasmic reticulum membrane / virion attachment to host cell / protein kinase binding / apoptotic process / positive regulation of DNA-templated transcription / host cell plasma membrane / structural molecule activity / virion membrane / enzyme binding / signal transduction / protein homodimerization activity / zinc ion binding / identical protein binding / plasma membrane
Similarity search - Function
CD4, extracellular / T cell CD4 receptor C-terminal region / CD4, extracellular / T cell CD4 receptor C terminal region / T-cell surface antigen CD4 / Immunoglobulin C2-set / Immunoglobulin C2-set domain / Immunoglobulin / Immunoglobulin domain / Envelope glycoprotein Gp160 ...CD4, extracellular / T cell CD4 receptor C-terminal region / CD4, extracellular / T cell CD4 receptor C terminal region / T-cell surface antigen CD4 / Immunoglobulin C2-set / Immunoglobulin C2-set domain / Immunoglobulin / Immunoglobulin domain / Envelope glycoprotein Gp160 / Retroviral envelope protein / Retroviral envelope protein GP41-like / Gp120 core superfamily / Envelope glycoprotein GP120 / Human immunodeficiency virus 1, envelope glycoprotein Gp120 / Immunoglobulin subtype 2 / Immunoglobulin C-2 Type / Immunoglobulin V-Type / Immunoglobulin V-set domain / Immunoglobulin subtype / Immunoglobulin / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold
Similarity search - Domain/homology
Envelope glycoprotein gp160 / Envelope glycoprotein gp160 / T-cell surface glycoprotein CD4
Similarity search - Component
Biological speciesHuman immunodeficiency virus 1 / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.04 Å
AuthorsOzorowski G / Torres JL
Funding support United States, 3 items
OrganizationGrant numberCountry
Other private109718-63-RKNT United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM069832 United States
Bill & Melinda Gates FoundationOPP1115782 United States
Citation
Journal: Cell Rep / Year: 2020
Title: A Strain-Specific Inhibitor of Receptor-Bound HIV-1 Targets a Pocket near the Fusion Peptide.
Authors: Gabriel Ozorowski / Jonathan L Torres / Diogo Santos-Martins / Stefano Forli / Andrew B Ward /
Abstract: Disruption of viral fusion represents a viable, albeit under-explored, target for HIV therapeutics. Here, while studying the receptor-bound envelope glycoprotein conformation by cryoelectron ...Disruption of viral fusion represents a viable, albeit under-explored, target for HIV therapeutics. Here, while studying the receptor-bound envelope glycoprotein conformation by cryoelectron microscopy (cryo-EM), we identify a pocket near the base of the trimer containing a bound detergent molecule and perform in silico drug screening by using a library of drug-like and commercially available molecules. After down-selection, we solve cryo-EM structures that validate the binding of two small molecule hits in very similar manners to the predicted binding poses, including interactions with aromatic residues within the fusion peptide. One of the molecules demonstrates low micromolar inhibition of the autologous virus by using a very rare phenylalanine in the fusion peptide and stabilizing the surrounding region. This work demonstrates that small molecules can target the fusion process, providing an additional target for anti-HIV therapeutics, and highlights the need to explore how fusion peptide sequence variations affect receptor-mediated conformational states across diverse HIV strains.
#1: Journal: Biorxiv / Year: 2020
Title: A strain-specific inhibitor of receptor-bound HIV-1 targets a pocket near the fusion peptide and offers a template for drug design
Authors: Ozorowski G / Torres JL / Santos-Martins D / Forli S / Ward AB
History
DepositionMay 25, 2020-
Header (metadata) releaseOct 21, 2020-
Map releaseOct 21, 2020-
UpdateNov 6, 2024-
Current statusNov 6, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.02
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.02
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  • Surface view with fitted model
  • Atomic models: PDB-6x5c
  • Surface level: 0.02
  • Imaged by UCSF Chimera
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Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22049.png

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Map

FileDownload / File: emd_22049.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationsharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.15 Å/pix.
x 288 pix.
= 331.2 Å		1.15 Å/pix.
x 288 pix.
= 331.2 Å		1.15 Å/pix.
x 288 pix.
= 331.2 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.15 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.02 / Movie #1: 0.02
Minimum - Maximum-0.050882947 - 0.09916691
Average (Standard dev.)-0.00025375353 (±0.003839302)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 331.19998 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.151.151.15
M x/y/z288288288
origin x/y/z0.0000.0000.000
length x/y/z331.200331.200331.200
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ304304304
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS288288288
D min/max/mean-0.0510.099-0.000

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Supplemental data

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Mask #1

Fileemd_22049_msk_1.map
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AxesZYX

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Half map: Half map 2

Fileemd_22049_half_map_1.map
AnnotationHalf map 2
Projections & Slices
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Histogram

Histogram (log scale)

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Half map: Half map 1

Fileemd_22049_half_map_2.map
AnnotationHalf map 1
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Sample components

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Entire : B41 HIV-1 Env SOSIP in complex with soluble CD4, 17b Fab, and sma...

EntireName: B41 HIV-1 Env SOSIP in complex with soluble CD4, 17b Fab, and small molecule GO52
Components
  • Complex: B41 HIV-1 Env SOSIP in complex with soluble CD4, 17b Fab, and small molecule GO52
    • Protein or peptide: Envelope glycoprotein gp160
    • Protein or peptide: Envelope glycoprotein gp41
    • Protein or peptide: T-cell surface glycoprotein CD4
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: N-(4'-methyl[1,1'-biphenyl]-4-yl)-1-oxa-7-azaspiro[3.5]nonane-7-carboxamide

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Supramolecule #1: B41 HIV-1 Env SOSIP in complex with soluble CD4, 17b Fab, and sma...

SupramoleculeName: B41 HIV-1 Env SOSIP in complex with soluble CD4, 17b Fab, and small molecule GO52
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 630 KDa

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Macromolecule #1: Envelope glycoprotein gp160

MacromoleculeName: Envelope glycoprotein gp160 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1 / Strain: B41
Molecular weightTheoretical: 58.872902 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MDAMKRGLCC VLLLCGAVFV SPSQEIHARF RRGARAAKKW VTVYYGVPVW KEATTTLFCA SDAKAYDTEV HNVWATHACV PTDPNPQEI VLGNVTENFN MWKNNMVEQM HEDIISLWDQ SLKPCVKLTP LCVTLNCNNV NTNNTNNSTN ATISDWEKME T GEMKNCSF ...String:
MDAMKRGLCC VLLLCGAVFV SPSQEIHARF RRGARAAKKW VTVYYGVPVW KEATTTLFCA SDAKAYDTEV HNVWATHACV PTDPNPQEI VLGNVTENFN MWKNNMVEQM HEDIISLWDQ SLKPCVKLTP LCVTLNCNNV NTNNTNNSTN ATISDWEKME T GEMKNCSF NVTTSIRDKI KKEYALFYKL DVVPLENKNN INNTNITNYR LINCNTSVIT QACPKVSFEP IPIHYCAPAG FA ILKCNSK TFNGSGPCTN VSTVQCTHGI RPVVSTQLLL NGSLAEEEIV IRSENITDNA KTIIVQLNEA VEINCTRPNN NTR KSIHIG PGRAFYATGD IIGNIRQAHC NISKARWNET LGQIVAKLEE QFPNKTIIFN HSSGGDPEIV THSFNCGGEF FYCN TTPLF NSTWNNTRTD DYPTGGEQNI TLQCRIKQII NMWQGVGKAM YAPPIRGQIR CSSNITGLLL TRDGGRDQNG TETFR PGGG NMRDNWRSEL YKYKVVKIEP LGIAPTACKR RVVQRRRRRR

UniProtKB: Envelope glycoprotein gp160

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Macromolecule #2: Envelope glycoprotein gp41

MacromoleculeName: Envelope glycoprotein gp41 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1 / Strain: B41
Molecular weightTheoretical: 17.357824 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
AVGLGAFILG FLGAAGSTMG AASMALTVQA RLLLSGIVQQ QNNLLRAPEA QQHMLQLTVW GIKQLQARVL AVERYLRDQQ LLGIWGCSG KIICCTNVPW NDSWSNKTIN EIWDNMTWMQ WEKEIDNYTQ HIYTLLEVSQ IQQEKNEQEL LELD

UniProtKB: Envelope glycoprotein gp160

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Macromolecule #3: T-cell surface glycoprotein CD4

MacromoleculeName: T-cell surface glycoprotein CD4 / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.039172 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: METDTLLLWV LLLWVPGSTG KKVVLGKKGD TVELTCTASQ KKSIQFHWKN SNQIKILGNQ GSFLTKGPSK LNDRADSRRS LWDQGNFPL IIKNLKIEDS DTYICEVEDQ KEEVQLLVFG LTANSDTHLL QGQSLTLTLE SPPGSSPSVQ CRSPRGKNIQ G GKTLSVSQ ...String:
METDTLLLWV LLLWVPGSTG KKVVLGKKGD TVELTCTASQ KKSIQFHWKN SNQIKILGNQ GSFLTKGPSK LNDRADSRRS LWDQGNFPL IIKNLKIEDS DTYICEVEDQ KEEVQLLVFG LTANSDTHLL QGQSLTLTLE SPPGSSPSVQ CRSPRGKNIQ G GKTLSVSQ LELQDSGTWT CTVLQNQKKV EFKIDIVVLA GGSGHHHHHH

UniProtKB: T-cell surface glycoprotein CD4

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Macromolecule #6: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 6 / Number of copies: 23 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #7: N-(4'-methyl[1,1'-biphenyl]-4-yl)-1-oxa-7-azaspiro[3.5]nonane-7-c...

MacromoleculeName: N-(4'-methyl[1,1'-biphenyl]-4-yl)-1-oxa-7-azaspiro[3.5]nonane-7-carboxamide
type: ligand / ID: 7 / Number of copies: 3 / Formula: UOV
Molecular weightTheoretical: 336.427 Da
Chemical component information

ChemComp-UOV:
N-(4'-methyl[1,1'-biphenyl]-4-yl)-1-oxa-7-azaspiro[3.5]nonane-7-carboxamide

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.5 mg/mL
BufferpH: 7.4
Component:
ConcentrationFormulaName
150.0 mMNaClsodium chloride
50.0 mMTris
0.005 mMLauryl Maltose Neopentyl Glycol

Details: Detergent diluted into sample shortly before application to grid
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 283 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number real images: 2654 / Average exposure time: 11.5 sec. / Average electron dose: 49.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.5 µm / Nominal magnification: 36000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

8713

Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 4.04 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 228502
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

5vn3


Chain - Source name: PDB / Chain - Initial model type: experimental model
Output model

PDB-6x5c:
Asymmetric model of CD4-bound B41 HIV-1 Env SOSIP in complex with small molecule GO52

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