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- PDB-5vvf: Crystal Structure of 354BG1 Fab -

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Basic information

Entry
Database: PDB / ID: 5vvf
TitleCrystal Structure of 354BG1 Fab
Components
  • 354BG1 Heavy Chain
  • 354BG1 Light Chain
KeywordsIMMUNE SYSTEM / HIV / broadly neutralizing antibody
Function / homologyImmunoglobulins / Immunoglobulin-like / Sandwich / Mainly Beta
Function and homology information
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2 Å
AuthorsScharf, L. / Gristick, H.B. / Bjorkman, P.J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)5P01AI100148 United States
CitationJournal: Elife / Year: 2017
Title: Asymmetric recognition of HIV-1 Envelope trimer by V1V2 loop-targeting antibodies.
Authors: Haoqing Wang / Harry B Gristick / Louise Scharf / Anthony P West / Rachel P Galimidi / Michael S Seaman / Natalia T Freund / Michel C Nussenzweig / Pamela J Bjorkman /
Abstract: The HIV-1 envelope (Env) glycoprotein binds to host cell receptors to mediate membrane fusion. The prefusion Env trimer is stabilized by V1V2 loops that interact at the trimer apex. Broadly ...The HIV-1 envelope (Env) glycoprotein binds to host cell receptors to mediate membrane fusion. The prefusion Env trimer is stabilized by V1V2 loops that interact at the trimer apex. Broadly neutralizing antibodies (bNAbs) against V1V2 loops, exemplified by PG9, bind asymmetrically as a single Fab to the apex of the symmetric Env trimer using a protruding CDRH3 to penetrate the Env glycan shield. Here we characterized a distinct mode of V1V2 epitope recognition by the new bNAb BG1 in which two Fabs bind asymmetrically per Env trimer using a compact CDRH3. Comparisons between cryo-EM structures of Env trimer complexed with BG1 (6.2 Å resolution) and PG9 (11.5 Å resolution) revealed a new V1V2-targeting strategy by BG1. Analyses of the EM structures provided information relevant to vaccine design including molecular details for different modes of asymmetric recognition of Env trimer and a binding model for BG1 recognition of V1V2 involving glycan flexibility.
History
DepositionMay 19, 2017Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 6, 2017Provider: repository / Type: Initial release
Revision 1.1Dec 11, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.2Oct 4, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
H: 354BG1 Heavy Chain
L: 354BG1 Light Chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)50,7003
Polymers50,6382
Non-polymers621
Water4,360242
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area3400 Å2
ΔGint-23 kcal/mol
Surface area20000 Å2
MethodPISA
Unit cell
Length a, b, c (Å)95.630, 95.630, 103.951
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number154
Space group name H-MP3221
Components on special symmetry positions
IDModelComponents
11L-418-

HOH

21L-511-

HOH

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Components

#1: Antibody 354BG1 Heavy Chain


Mass: 27111.328 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#2: Antibody 354BG1 Light Chain


Mass: 23527.102 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#3: Chemical ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL / Ethylene glycol


Mass: 62.068 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C2H6O2
#4: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 242 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 2.89 Å3/Da / Density % sol: 57.42 %
Crystal growTemperature: 293 K / Method: vapor diffusion, sitting drop / pH: 8
Details: 1.8 M ammonium sulfate, 0.1 M Bis-Tris pH 6.5, 2% v/v PEG 550 MME, 100 nM NDSB-256

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL12-2 / Wavelength: 1 Å
DetectorType: DECTRIS PILATUS3 S 6M / Detector: PIXEL / Date: Jul 10, 2015
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2→82.82 Å / Num. obs: 37475 / % possible obs: 99.7 % / Redundancy: 5.5 % / Net I/σ(I): 7.9

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Processing

Software
NameVersionClassification
PHENIX(1.11_2567: ???)refinement
iMOSFLM7.2.1data processing
Aimless7.0.038data reduction
Aimless7.0.038data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 2909 FAB (PDB CODE 3PIQ)
Resolution: 2→29.97 Å / SU ML: 0.26 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 27.39
RfactorNum. reflection% reflection
Rfree0.247 3724 9.97 %
Rwork0.21 --
obs0.214 37356 99.4 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å
Refinement stepCycle: LAST / Resolution: 2→29.97 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3309 0 4 242 3555
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0073401
X-RAY DIFFRACTIONf_angle_d0.9484635
X-RAY DIFFRACTIONf_dihedral_angle_d15.1482000
X-RAY DIFFRACTIONf_chiral_restr0.057510
X-RAY DIFFRACTIONf_plane_restr0.006602
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
2-2.02540.3721270.32221251X-RAY DIFFRACTION99
2.0254-2.0520.36441520.32681174X-RAY DIFFRACTION99
2.052-2.08010.34781600.32571243X-RAY DIFFRACTION99
2.0801-2.10980.29011430.31061208X-RAY DIFFRACTION99
2.1098-2.14130.29351210.29341243X-RAY DIFFRACTION100
2.1413-2.17480.3581250.27791271X-RAY DIFFRACTION100
2.1748-2.21040.3261180.27351216X-RAY DIFFRACTION99
2.2104-2.24850.31231230.26451254X-RAY DIFFRACTION100
2.2485-2.28940.26351100.26081262X-RAY DIFFRACTION99
2.2894-2.33340.29931260.25311257X-RAY DIFFRACTION99
2.3334-2.3810.32291290.25061219X-RAY DIFFRACTION99
2.381-2.43270.29731490.24451229X-RAY DIFFRACTION99
2.4327-2.48930.27881480.24731196X-RAY DIFFRACTION99
2.4893-2.55150.25221390.24051236X-RAY DIFFRACTION99
2.5515-2.62050.29531390.24361241X-RAY DIFFRACTION100
2.6205-2.69750.26021410.24261244X-RAY DIFFRACTION100
2.6975-2.78460.29041380.23091242X-RAY DIFFRACTION100
2.7846-2.8840.25351440.23671262X-RAY DIFFRACTION100
2.884-2.99940.27151410.2341247X-RAY DIFFRACTION100
2.9994-3.13570.26481510.21731230X-RAY DIFFRACTION99
3.1357-3.30090.25711500.21651241X-RAY DIFFRACTION99
3.3009-3.50740.22491470.19761244X-RAY DIFFRACTION100
3.5074-3.77770.21491300.17731258X-RAY DIFFRACTION100
3.7777-4.1570.21951200.16441317X-RAY DIFFRACTION100
4.157-4.75640.17951390.14181245X-RAY DIFFRACTION98
4.7564-5.98480.20551650.16621264X-RAY DIFFRACTION100
5.9848-29.97630.21411490.19451338X-RAY DIFFRACTION99
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL112)L122)L132)L222)L232)L332)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T112)T122)T132)T222)T232)T332)Origin x (Å)Origin y (Å)Origin z (Å)
12.98340.3545-2.00821.00130.3636.76930.2027-0.44840.04520.19380.2641-0.4838-0.14961.1493-0.38050.3616-0.0478-0.08710.4761-0.04380.331862.76-26.490311.3222
22.2983-0.2089-0.5982.26721.09852.29740.1193-0.7579-0.16910.66160.0411-0.12820.30890.4828-0.26490.4818-0.0348-0.08430.5638-0.00710.235654.63-27.779221.8522
31.6072-0.3947-0.46941.6421-0.22141.7450.0355-0.067-0.01710.02180.03280.04490.36430.2095-0.03040.3593-0.0079-0.03520.4175-0.02280.215850.3487-31.548612.0987
42.27880.07-1.08762.4761-0.3094.6990.01130.0071-0.2238-0.1543-0.1029-0.15440.70720.4140.02190.41060.0534-0.01190.5101-0.02850.293959.0171-32.35796.8553
52.0403-0.501-0.19752.09260.19142.83630.047-0.5843-0.00010.4974-0.00910.17760.0484-0.4838-0.00440.3744-0.0440.01730.4887-0.03390.192742.9948-24.325119.1085
61.95220.86560.39371.6693-0.3611.1862-0.1857-0.3480.2252-0.05290.3166-0.67390.00870.841-0.18020.27720.01220.03940.564-0.06780.4468.1073-22.48543.0542
72.706-0.9880.04911.9046-0.36872.0426-0.0684-0.05910.61970.065-0.1945-0.7199-0.28270.49440.26250.3205-0.07580.01620.47560.00030.642373.0619-4.5086-4.9074
81.56721.87270.15676.1978-0.00812.0611-0.09390.22230.2218-0.44020.25120.20380.197-0.0975-0.2950.3358-0.04010.00260.41160.00730.30738.9314-9.96850.7477
92.74371.51660.11163.37590.16211.2276-0.18210.0244-0.1808-0.30830.14150.29480.1748-0.48060.02850.2971-0.0791-0.01320.4263-0.05470.253135.6128-17.28456.4656
109.0865-0.2799-5.87812.6086-1.35865.43130.11750.0010.41780.28250.0064-0.2952-0.22040.2257-0.07740.2644-0.0831-0.00750.3595-0.0810.284748.7679-12.141411.276
111.01710.2437-0.97031.4036-0.54682.37860.1155-0.05030.1350.0341-0.0374-0.0202-0.1678-0.0647-0.10830.2531-0.0413-0.02170.3321-0.03330.272846.0917-9.38092.9152
121.2068-0.2855-0.44052.0050.91422.15920.01030.29870.0802-0.46890.0183-0.214-0.28480.3794-0.01970.4034-0.06660.06590.39910.01220.321259.4295-8.3388-16.6451
132.8445-0.1964-0.22982.6151-0.08112.28180.01220.52620.3114-0.4522-0.0039-0.4292-0.14880.1783-0.04260.4047-0.10.1190.41660.02490.406962.2061-5.2021-18.0132
Refinement TLS group
IDRefine-IDRefine TLS-IDSelection detailsAuth asym-IDAuth seq-ID
1X-RAY DIFFRACTION1( CHAIN H AND RESID 1:17 )H1 - 17
2X-RAY DIFFRACTION2( CHAIN H AND RESID 18:33 )H18 - 33
3X-RAY DIFFRACTION3( CHAIN H AND RESID 34:75 )H34 - 75
4X-RAY DIFFRACTION4( CHAIN H AND RESID 76:87 )H76 - 87
5X-RAY DIFFRACTION5( CHAIN H AND RESID 88:103 )H88 - 103
6X-RAY DIFFRACTION6( CHAIN H AND RESID 104:119 )H104 - 119
7X-RAY DIFFRACTION7( CHAIN H AND RESID 120:213 )H120 - 213
8X-RAY DIFFRACTION8( CHAIN L AND RESID 1:18 )L1 - 18
9X-RAY DIFFRACTION9( CHAIN L AND RESID 19:38 )L19 - 38
10X-RAY DIFFRACTION10( CHAIN L AND RESID 39:48 )L39 - 48
11X-RAY DIFFRACTION11( CHAIN L AND RESID 49:128 )L49 - 128
12X-RAY DIFFRACTION12( CHAIN L AND RESID 129:163 )L129 - 163
13X-RAY DIFFRACTION13( CHAIN L AND RESID 164:213 )L164 - 213

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