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Yorodumi- PDB-7ti6: Crystal structure of the wild-type least mutated common ancestor ... -
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-Basic information
Entry | Database: PDB / ID: 7ti6 | |||||||||
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Title | Crystal structure of the wild-type least mutated common ancestor (LMCA) of the HIV-targeting PCT64 antibody lineage | |||||||||
Components |
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Keywords | IMMUNE SYSTEM / Antibody / Broadly Neutralizing / HIV-1 / V2 Apex | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.64 Å | |||||||||
Authors | Omorodion, O. / Wilson, I.A. | |||||||||
Funding support | United States, 2items
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Citation | Journal: Immunity / Year: 2022 Title: Human immunoglobulin repertoire analysis guides design of vaccine priming immunogens targeting HIV V2-apex broadly neutralizing antibody precursors. Authors: Jordan R Willis / Zachary T Berndsen / Krystal M Ma / Jon M Steichen / Torben Schiffner / Elise Landais / Alessia Liguori / Oleksandr Kalyuzhniy / Joel D Allen / Sabyasachi Baboo / ...Authors: Jordan R Willis / Zachary T Berndsen / Krystal M Ma / Jon M Steichen / Torben Schiffner / Elise Landais / Alessia Liguori / Oleksandr Kalyuzhniy / Joel D Allen / Sabyasachi Baboo / Oluwarotimi Omorodion / Jolene K Diedrich / Xiaozhen Hu / Erik Georgeson / Nicole Phelps / Saman Eskandarzadeh / Bettina Groschel / Michael Kubitz / Yumiko Adachi / Tina-Marie Mullin / Nushin B Alavi / Samantha Falcone / Sunny Himansu / Andrea Carfi / Ian A Wilson / John R Yates / James C Paulson / Max Crispin / Andrew B Ward / William R Schief / Abstract: Broadly neutralizing antibodies (bnAbs) to the HIV envelope (Env) V2-apex region are important leads for HIV vaccine design. Most V2-apex bnAbs engage Env with an uncommonly long heavy-chain ...Broadly neutralizing antibodies (bnAbs) to the HIV envelope (Env) V2-apex region are important leads for HIV vaccine design. Most V2-apex bnAbs engage Env with an uncommonly long heavy-chain complementarity-determining region 3 (HCDR3), suggesting that the rarity of bnAb precursors poses a challenge for vaccine priming. We created precursor sequence definitions for V2-apex HCDR3-dependent bnAbs and searched for related precursors in human antibody heavy-chain ultradeep sequencing data from 14 HIV-unexposed donors. We found potential precursors in a majority of donors for only two long-HCDR3 V2-apex bnAbs, PCT64 and PG9, identifying these bnAbs as priority vaccine targets. We then engineered ApexGT Env trimers that bound inferred germlines for PCT64 and PG9 and had higher affinities for bnAbs, determined cryo-EM structures of ApexGT trimers complexed with inferred-germline and bnAb forms of PCT64 and PG9, and developed an mRNA-encoded cell-surface ApexGT trimer. These methods and immunogens have promise to assist HIV vaccine development. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 7ti6.cif.gz | 211.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb7ti6.ent.gz | 148.2 KB | Display | PDB format |
PDBx/mmJSON format | 7ti6.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 7ti6_validation.pdf.gz | 444.7 KB | Display | wwPDB validaton report |
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Full document | 7ti6_full_validation.pdf.gz | 447.1 KB | Display | |
Data in XML | 7ti6_validation.xml.gz | 17.3 KB | Display | |
Data in CIF | 7ti6_validation.cif.gz | 23.3 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ti/7ti6 ftp://data.pdbj.org/pub/pdb/validation_reports/ti/7ti6 | HTTPS FTP |
-Related structure data
Related structure data | 7t73C 7t74C 7t75C 7t76C 7t77C 6ca7S S: Starting model for refinement C: citing same article (ref.) |
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-Links
-Assembly
Deposited unit |
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1 |
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Unit cell |
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-Components
#1: Antibody | Mass: 25605.490 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) |
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#2: Antibody | Mass: 23503.041 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: N-terminal residues "VH" originate from the signal peptide Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human) |
#3: Chemical | ChemComp-EPE / |
#4: Water | ChemComp-HOH / |
Has ligand of interest | N |
Sequence details | This Fab was isolated as part of an antibody lineage from an HIV-infected human donor. Within said ...This Fab was isolated as part of an antibody lineage from an HIV-infected human donor. Within said lineage, its sequence is closest to the antibody germline; it is the least mutated member of the family. |
-Experimental details
-Experiment
Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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-Sample preparation
Crystal | Density Matthews: 2.77 Å3/Da / Density % sol: 55.67 % |
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Crystal grow | Temperature: 277.15 K / Method: vapor diffusion, sitting drop / Details: 0.1 M HEPES (pH 6.5), 12% (w/v) PEG 6000 |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: SYNCHROTRON / Site: APS / Beamline: 23-ID-D / Wavelength: 1.03319 Å |
Detector | Type: DECTRIS PILATUS3 6M / Detector: PIXEL / Date: Jun 20, 2018 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1.03319 Å / Relative weight: 1 |
Reflection | Resolution: 2.64→50 Å / Num. obs: 15988 / % possible obs: 100 % / Redundancy: 6.5 % / Biso Wilson estimate: 47.19 Å2 / CC1/2: 0.83 / Rpim(I) all: 0.11 / Rsym value: 0.25 / Net I/σ(I): 8.7 |
Reflection shell | Resolution: 2.64→2.69 Å / Redundancy: 5.6 % / Mean I/σ(I) obs: 1.4 / Num. unique obs: 811 / CC1/2: 0.34 / Rpim(I) all: 0.87 / Rsym value: 1.91 / % possible all: 100 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: 6CA7 Resolution: 2.64→48.97 Å / SU ML: 0.4915 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 29.9551 Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 61.8 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.64→48.97 Å
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Refine LS restraints |
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LS refinement shell |
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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