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- EMDB-8407: Cryo-EM structure of a BG505 Env-sCD4-17b-8ANC195 complex -

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Basic information

Entry
Database: EMDB / ID: EMD-8407
TitleCryo-EM structure of a BG505 Env-sCD4-17b-8ANC195 complex
Map dataBG505 SOSIP in complex with sCD4, 17b Fab, and 8ANC195 Fab.
Sample
  • Complex: BG505 SOSIP-sCD4-17b-8ANC195 complex
    • Complex: 17b Fab
      • Protein or peptide: 17b Fab VL domain
      • Protein or peptide: 17b Fab VH domain
    • Complex: BG505 SOSIP trimer
      • Protein or peptide: BG505 SOSIP gp41
      • Protein or peptide: BG505 SOSIP gp120
    • Complex: 8ANC195 G52K5 Fab
      • Protein or peptide: 8ANC195 G52K5 VH domain
      • Protein or peptide: 8ANC195 G52K5 VL domain
    • Organelle or cellular component: CD4 D1-D2 domain
      • Protein or peptide: T-cell surface glycoprotein CD4
Keywordscryo-EM / HIV-1 Env / CD4 / VIRAL PROTEIN
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
T-cell surface glycoprotein CD4 / Envelope glycoprotein gp160
Similarity search - Component
Biological speciesHomo sapiens (human) / Human immunodeficiency virus 1
Methodsingle particle reconstruction / cryo EM / Resolution: 8.9 Å
AuthorsWang H / Bjorkman PJ
Funding support United States, 3 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)2 P50 GM082545-06 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)HIVRAD P01 AI100148 United States
Bill & Melinda Gates FoundationCollaboration for AIDS Vaccine Discovery Grant 1040753 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2016
Title: Cryo-EM structure of a CD4-bound open HIV-1 envelope trimer reveals structural rearrangements of the gp120 V1V2 loop.
Authors: Haoqing Wang / Alexander A Cohen / Rachel P Galimidi / Harry B Gristick / Grant J Jensen / Pamela J Bjorkman /
Abstract: The HIV-1 envelope (Env) glycoprotein, a trimer of gp120-gp41 heterodimers, relies on conformational flexibility to function in fusing the viral and host membranes. Fusion is achieved after gp120 ...The HIV-1 envelope (Env) glycoprotein, a trimer of gp120-gp41 heterodimers, relies on conformational flexibility to function in fusing the viral and host membranes. Fusion is achieved after gp120 binds to CD4, the HIV-1 receptor, and a coreceptor, capturing an open conformational state in which the fusion machinery on gp41 gains access to the target cell membrane. In the well-characterized closed Env conformation, the gp120 V1V2 loops interact at the apex of the Env trimer. Less is known about the structure of the open CD4-bound state, in which the V1V2 loops must rearrange and separate to allow access to the coreceptor binding site. We identified two anti-HIV-1 antibodies, the coreceptor mimicking antibody 17b and the gp120-gp41 interface-spanning antibody 8ANC195, that can be added as Fabs to a soluble native-like Env trimer to stabilize it in a CD4-bound conformation. Here, we present an 8.9-Å cryo-electron microscopy structure of a BG505 Env-sCD4-17b-8ANC195 complex, which reveals large structural rearrangements in gp120, but small changes in gp41, compared with closed Env structures. The gp120 protomers are rotated and separated in the CD4-bound structure, and the three V1V2 loops are displaced by ∼40 Å from their positions at the trimer apex in closed Env to the sides of the trimer in positions adjacent to, and interacting with, the three bound CD4s. These results are relevant to understanding CD4-induced conformational changes leading to coreceptor binding and fusion, and HIV-1 Env conformational dynamics, and describe a target structure relevant to drug design and vaccine efforts.
History
DepositionOct 28, 2016-
Header (metadata) releaseNov 16, 2016-
Map releaseNov 16, 2016-
UpdateOct 23, 2024-
Current statusOct 23, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0074
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.0074
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-5thr
  • Surface level: 0.0074
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_8407.png

Downloads & links

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Map

FileDownload / File: emd_8407.map.gz / Format: CCP4 / Size: 226.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationBG505 SOSIP in complex with sCD4, 17b Fab, and 8ANC195 Fab.
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 390 pix.
= 319.8 Å		0.82 Å/pix.
x 390 pix.
= 319.8 Å		0.82 Å/pix.
x 390 pix.
= 319.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.82 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0074 / Movie #1: 0.0074
Minimum - Maximum-0.008169234 - 0.016621148
Average (Standard dev.)0.00014300481 (±0.0013653535)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions390390390
Spacing390390390
CellA=B=C: 319.8 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.820.820.82
M x/y/z390390390
origin x/y/z0.0000.0000.000
length x/y/z319.800319.800319.800
α/β/γ90.00090.00090.000
start NX/NY/NZ-152-37
NX/NY/NZ998271
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS390390390
D min/max/mean-0.0080.0170.000

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Supplemental data

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Sample components

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Entire : BG505 SOSIP-sCD4-17b-8ANC195 complex

EntireName: BG505 SOSIP-sCD4-17b-8ANC195 complex
Components
  • Complex: BG505 SOSIP-sCD4-17b-8ANC195 complex
    • Complex: 17b Fab
      • Protein or peptide: 17b Fab VL domain
      • Protein or peptide: 17b Fab VH domain
    • Complex: BG505 SOSIP trimer
      • Protein or peptide: BG505 SOSIP gp41
      • Protein or peptide: BG505 SOSIP gp120
    • Complex: 8ANC195 G52K5 Fab
      • Protein or peptide: 8ANC195 G52K5 VH domain
      • Protein or peptide: 8ANC195 G52K5 VL domain
    • Organelle or cellular component: CD4 D1-D2 domain
      • Protein or peptide: T-cell surface glycoprotein CD4

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Supramolecule #1: BG505 SOSIP-sCD4-17b-8ANC195 complex

SupramoleculeName: BG505 SOSIP-sCD4-17b-8ANC195 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Molecular weightTheoretical: 50 KDa

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Supramolecule #3: 17b Fab

SupramoleculeName: 17b Fab / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #4-#5
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #4: BG505 SOSIP trimer

SupramoleculeName: BG505 SOSIP trimer / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #1-#2
Source (natural)Organism: Human immunodeficiency virus 1

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Supramolecule #5: 8ANC195 G52K5 Fab

SupramoleculeName: 8ANC195 G52K5 Fab / type: complex / ID: 5 / Parent: 1 / Macromolecule list: #6-#7
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #2: CD4 D1-D2 domain

SupramoleculeName: CD4 D1-D2 domain / type: organelle_or_cellular_component / ID: 2 / Parent: 1 / Macromolecule list: #3
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: BG505 SOSIP gp41

MacromoleculeName: BG505 SOSIP gp41 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 17.146482 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
AVGIGAVFLG FLGAAGSTMG AASMTLTVQA RNLLSGIVQQ QSNLLRAPEA QQHLLKLTVW GIKQLQARVL AVERYLRDQQ LLGIWGCSG KLICCTNVPW NSSWSNRNLS EIWDNMTWLQ WDKEISNYTQ IIYGLLEESQ NQQEKNEQDL LALD

UniProtKB: Envelope glycoprotein gp160

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Macromolecule #2: BG505 SOSIP gp120

MacromoleculeName: BG505 SOSIP gp120 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 54.064277 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: AENLWVTVYY GVPVWKDAET TLFCASDAKA YETEKHNVWA THACVPTDPN PQEIHLENVT EEFNMWKNNM VEQMHTDIIS LWDQSLKPC VKLTPLCVTL QCTNVTNNIT DDMRGELKNC SFNMTTELRD KKQKVYSLFY RLDVVQINEN QGNRSNNSNK E YRLINCNT ...String:
AENLWVTVYY GVPVWKDAET TLFCASDAKA YETEKHNVWA THACVPTDPN PQEIHLENVT EEFNMWKNNM VEQMHTDIIS LWDQSLKPC VKLTPLCVTL QCTNVTNNIT DDMRGELKNC SFNMTTELRD KKQKVYSLFY RLDVVQINEN QGNRSNNSNK E YRLINCNT SAITQACPKV SFEPIPIHYC APAGFAILKC KDKKFNGTGP CPSVSTVQCT HGIKPVVSTQ LLLNGSLAEE EV MIRSENI TNNAKNILVQ FNTPVQINCT RPNNNTRKSI RIGPGQAFYA TGDIIGDIRQ AHCNVSKATW NETLGKVVKQ LRK HFGNNT IIRFANSSGG DLEVTTHSFN CGGEFFYCNT SGLFNSTWIS NTSVQGSNST GSNDSITLPC RIKQIINMWQ RIGQ AMYAP PIQGVIRCVS NITGLILTRD GGSTNSTTET FRPGGGDMRD NWRSELYKYK VVKIEPLGVA PTRCKRRVVG RRRRR R

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: 21.47235 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: KKVVLGKKGD TVELTCTASQ KKSIQFHWKN SNQIKILGNQ GSFLTKGPSK LNDRADSRRS LWDQGNFPLI IKNLKIEDSD TYICEVEDQ KEEVQLLVFG LTANSDTHLL QGQSLTLTLE SPPGSSPSVQ CRSPRGKNIQ GGKTLSVSQL ELQDSGTWTC T VLQNQKKV ...String:
KKVVLGKKGD TVELTCTASQ KKSIQFHWKN SNQIKILGNQ GSFLTKGPSK LNDRADSRRS LWDQGNFPLI IKNLKIEDSD TYICEVEDQ KEEVQLLVFG LTANSDTHLL QGQSLTLTLE SPPGSSPSVQ CRSPRGKNIQ GGKTLSVSQL ELQDSGTWTC T VLQNQKKV EFKIDIVVLA FQKAIDGRHH HHHH

UniProtKB: T-cell surface glycoprotein CD4

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Macromolecule #4: 17b Fab VL domain

MacromoleculeName: 17b Fab VL domain / type: protein_or_peptide / ID: 4 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.399898 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DIVMTQSPAT LSVSPGERAT LSCRASESVS SDLAWYQQKP GQAPRLLIYG ASTRATGVPA RFSGSGSGAE FTLTISSLQS EDFAVYYCQ QYNNWPPRYT FGQGTRLEIK RTVAAPSVFI FPPSDEQLKS GTASVVCLLN NFYPREAKVQ WKVDNALQSG N SQESVTEQ ...String:
DIVMTQSPAT LSVSPGERAT LSCRASESVS SDLAWYQQKP GQAPRLLIYG ASTRATGVPA RFSGSGSGAE FTLTISSLQS EDFAVYYCQ QYNNWPPRYT FGQGTRLEIK RTVAAPSVFI FPPSDEQLKS GTASVVCLLN NFYPREAKVQ WKVDNALQSG N SQESVTEQ DSKDSTYSLS STLTLSKADY EKHKVYACEV THQGLSSPVT KSFNRG

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Macromolecule #5: 17b Fab VH domain

MacromoleculeName: 17b Fab VH domain / type: protein_or_peptide / ID: 5 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 24.457387 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: EVQLVESGAE VKKPGSSVKV SCKASGDTFI RYSFTWVRQA PGQGLEWMGR IITILDVAHY APHLQGRVTI TADKSTSTVY LELRNLRSD DTAVYFCAGV YEGEADEGEY DNNGFLKHWG QGTLVTVSSA STKGPSVFPL APSSKSTSGG TAALGCLVKD Y FPEPVTVS ...String:
EVQLVESGAE VKKPGSSVKV SCKASGDTFI RYSFTWVRQA PGQGLEWMGR IITILDVAHY APHLQGRVTI TADKSTSTVY LELRNLRSD DTAVYFCAGV YEGEADEGEY DNNGFLKHWG QGTLVTVSSA STKGPSVFPL APSSKSTSGG TAALGCLVKD Y FPEPVTVS WNSGALTSGV HTFPAVLQSS GLYSLSSVVT VPSSSLGTQT YICNVNHKPS NTKVDKKVEP K

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Macromolecule #6: 8ANC195 G52K5 VH domain

MacromoleculeName: 8ANC195 G52K5 VH domain / type: protein_or_peptide / ID: 6 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 26.12527 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QIHLVQSGTE VKKPGSSVTV SCKAYGVNTF GLYAVNWVRQ APGQSLEYIG QIWRWKSSAS HHFRGRVLIS AVDLTGSSPP ISSLEIKNL TSDDTAVYFC TTTSTYDKWS GLHHDGVMAF SSWGQGTLIS VSAASTKGPS VFPLAPSSKS TSGGTAALGC L VKDYFPEP ...String:
QIHLVQSGTE VKKPGSSVTV SCKAYGVNTF GLYAVNWVRQ APGQSLEYIG QIWRWKSSAS HHFRGRVLIS AVDLTGSSPP ISSLEIKNL TSDDTAVYFC TTTSTYDKWS GLHHDGVMAF SSWGQGTLIS VSAASTKGPS VFPLAPSSKS TSGGTAALGC L VKDYFPEP VTVSWNSGAL TSGVHTFPAV LQSSGLYSLS SVVTVPSSSL GTQTYICNVN HKPSNTKVDK RVEPKSCDKT HH HHHH

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Macromolecule #7: 8ANC195 G52K5 VL domain

MacromoleculeName: 8ANC195 G52K5 VL domain / type: protein_or_peptide / ID: 7 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.401984 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DIQMTQSPST LSASIGDTVR ISCRASQSIT GNWVAWYQQR PGKAPRLLIY RGAALLGGVP SRFSGSAAGT DFTLTIGNLQ AEDFGTFYC QQYDTYPGTF GQGTKVEVKR TVAAPSVFIF PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN S QESVTEQD ...String:
DIQMTQSPST LSASIGDTVR ISCRASQSIT GNWVAWYQQR PGKAPRLLIY RGAALLGGVP SRFSGSAAGT DFTLTIGNLQ AEDFGTFYC QQYDTYPGTF GQGTKVEVKR TVAAPSVFIF PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN S QESVTEQD SKDSTYSLSS TLTLSKADYE KHKVYACEVT HQGLSSPVTK SFNRGEC

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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

BufferpH: 8
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average exposure time: 3.5 sec. / Average electron dose: 35.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

3086

Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 8.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 5175
Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: RELION
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION
Final 3D classificationSoftware - Name: RELION
FSC plot (resolution estimation)

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Atomic model buiding 1

Detailsphenix_real.space.refine
RefinementProtocol: RIGID BODY FIT
Output model

PDB-5thr:
Cryo-EM structure of a BG505 Env-sCD4-17b-8ANC195 complex

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