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- EMDB-36649: CNE55.664 trimer in complex with broadly neutralizing HIV antibod... -
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Open data
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Basic information
Entry | ![]() | ||||||||||||
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Title | CNE55.664 trimer in complex with broadly neutralizing HIV antibody PGT145 | ||||||||||||
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![]() | HIV / Envelope trimer / broadly neutralizing antibody / PGT145 / Cryo-EM / VIRAL PROTEIN | ||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 5.14 Å | ||||||||||||
![]() | Chatterjee A / Chen C / Lee K / Mangala Prasad V | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: An HIV-1 broadly neutralizing antibody overcomes structural and dynamic variation through highly focused epitope targeting. Authors: Edgar A Hodge / Ananya Chatterjee / Chengbo Chen / Gajendra S Naika / Mint Laohajaratsang / Vidya Mangala Prasad / Kelly K Lee / ![]() ![]() Abstract: The existence of broadly cross-reactive antibodies that can neutralize diverse HIV-1 isolates (bnAbs) has been appreciated for more than a decade. Many high-resolution structures of bnAbs, typically ...The existence of broadly cross-reactive antibodies that can neutralize diverse HIV-1 isolates (bnAbs) has been appreciated for more than a decade. Many high-resolution structures of bnAbs, typically with one or two well-characterized HIV-1 Env glycoprotein trimers, have been reported. However, an understanding of how such antibodies grapple with variability in their antigenic targets across diverse viral isolates has remained elusive. To achieve such an understanding requires first characterizing the extent of structural and antigenic variation embodied in Env, and then identifying how a bnAb overcomes that variation at a structural level. Here, using hydrogen/deuterium-exchange mass spectrometry (HDX-MS) and quantitative measurements of antibody binding kinetics, we show that variation in structural ordering in the V1/V2 apex of Env across a globally representative panel of HIV-1 isolates has a marked effect on antibody association rates and affinities. We also report cryo-EM reconstructions of the apex-targeting PGT145 bnAb bound to two divergent Env that exhibit different degrees of structural dynamics throughout the trimer structures. Parallel HDX-MS experiments demonstrate that PGT145 bnAb has an exquisitely focused footprint at the trimer apex where binding did not yield allosteric changes throughout the rest of the structure. These results demonstrate that structural dynamics are a cryptic determinant of antigenicity, and mature antibodies that have achieved breadth and potency in some cases are able to achieve their broad cross-reactivity by "threading the needle" and binding in a highly focused fashion, thus evading and overcoming the variable properties found in Env from divergent isolates. | ||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 45.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 19.1 KB 19.1 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 8.6 KB | Display | ![]() |
Images | ![]() | 25.9 KB | ||
Filedesc metadata | ![]() | 6.8 KB | ||
Others | ![]() ![]() | 40.5 MB 40.5 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Map
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Voxel size | X=Y=Z: 1.35 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #1
File | emd_36649_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #2
File | emd_36649_half_map_2.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
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Sample components
-Entire : CNE55.664 trimer in complex with broadly neutralizing HIV antibod...
Entire | Name: CNE55.664 trimer in complex with broadly neutralizing HIV antibody PGT145 |
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Components |
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-Supramolecule #1: CNE55.664 trimer in complex with broadly neutralizing HIV antibod...
Supramolecule | Name: CNE55.664 trimer in complex with broadly neutralizing HIV antibody PGT145 type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4 |
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Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: gp120 protein of HIV envelope trimer
Macromolecule | Name: gp120 protein of HIV envelope trimer / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 54.064277 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: 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 |
-Macromolecule #2: gp41 protein of HIV envelope trimer
Macromolecule | Name: gp41 protein of HIV envelope trimer / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 17.146482 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: AVGIGAVFLG FLGAAGSTMG AASMTLTVQA RNLLSGIVQQ QSNLLRAPEA QQHLLKLTVW GIKQLQARVL AVERYLRDQQ LLGIWGCSG KLICCTNVPW NSSWSNRNLS EIWDNMTWLQ WDKEISNYTQ IIYGLLEESQ NQQEKNEQDL LALD |
-Macromolecule #3: PGT145 antibody fragment, heavy chain
Macromolecule | Name: PGT145 antibody fragment, heavy chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 28.793164 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: QASTMDWIWR ILFLVAAATS AHSQVQLVQS GAEVKKPGSS VKVSCKASGN SFSNHDVHWV RQATGQGLEW MGWMSHEGDK TGLAQKFQG RVTITRDSGA STVYMELRGL TADDTAIYYC LTGSKHRLRD YFLYNEYGPN YEEWGDYLAT LDVWGHGTAV T VSSASTKG ...String: QASTMDWIWR ILFLVAAATS AHSQVQLVQS GAEVKKPGSS VKVSCKASGN SFSNHDVHWV RQATGQGLEW MGWMSHEGDK TGLAQKFQG RVTITRDSGA STVYMELRGL TADDTAIYYC LTGSKHRLRD YFLYNEYGPN YEEWGDYLAT LDVWGHGTAV T VSSASTKG PSVFPLAPSS KSTSGGTAAL GCLVKDYFPE PVTVSWNSGA LTSGVHTFPA VLQSSGLYSL SSVVTVPSSS LG TQTYICN VNHKPSNTKV DKKVEPKSCD |
-Macromolecule #4: PGT145 antibody fragment, light chain
Macromolecule | Name: PGT145 antibody fragment, light chain / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 23.95375 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: EVVITQSPLF LPVTPGEAAS LSCKCSHSLQ HSTGANYLAW YLQRPGQTPR LLIHLATHRA SGVPDRFSGS GSGTDFTLKI SRVESDDVG TYYCMQGLHS PWTFGQGTKV EIKRTVAAPS VFIFPPSDEQ LKSGTASVVC LLNNFYPREA KVQWKVDNAL Q SGNSQESV ...String: EVVITQSPLF LPVTPGEAAS LSCKCSHSLQ HSTGANYLAW YLQRPGQTPR LLIHLATHRA SGVPDRFSGS GSGTDFTLKI SRVESDDVG TYYCMQGLHS PWTFGQGTKV EIKRTVAAPS VFIFPPSDEQ LKSGTASVVC LLNNFYPREA KVQWKVDNAL Q SGNSQESV TEQDSKDSTY SLSSTLTLSK ADYEKHKVYA CEVTHQGLSS PVTKSFNRGE C |
-Macromolecule #11: 2-acetamido-2-deoxy-beta-D-glucopyranose
Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 11 / Number of copies: 20 / Formula: NAG |
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Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 43.89 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.75 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Initial model | PDB ID: Chain - Source name: PDB / Chain - Initial model type: experimental model |
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Details | Rigid body fitting followed by real space refinement to improve map occupancy |
Refinement | Space: REAL / Protocol: RIGID BODY FIT |
Output model | ![]() PDB-8jtm: |