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

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Entry
Database: PDB / ID: 5thr
TitleCryo-EM structure of a BG505 Env-sCD4-17b-8ANC195 complex
Components
  • (8ANC195 G52K5 ...) x 2
  • 17b Fab VH domain
  • 17b Fab VL domain
  • BG505 SOSIP gp120
  • BG505 SOSIP gp41
  • T-cell surface glycoprotein CD4
KeywordsVIRAL PROTEIN / cryo-EM / HIV-1 Env / CD4
Function / homology
Function and homology information


helper T cell enhancement of adaptive immune response / interleukin-16 binding / interleukin-16 receptor activity / response to methamphetamine hydrochloride / maintenance of protein location in cell / cellular response to ionomycin / T cell selection / MHC class II protein binding / positive regulation of kinase activity / interleukin-15-mediated signaling pathway ...helper T cell enhancement of adaptive immune response / interleukin-16 binding / interleukin-16 receptor activity / response to methamphetamine hydrochloride / maintenance of protein location in cell / cellular response to ionomycin / T cell selection / MHC class II protein binding / positive regulation of kinase activity / interleukin-15-mediated signaling pathway / cellular response to granulocyte macrophage colony-stimulating factor stimulus / positive regulation of monocyte differentiation / Nef Mediated CD4 Down-regulation / Alpha-defensins / regulation of T cell activation / response to vitamin D / extracellular matrix structural constituent / Other interleukin signaling / T cell receptor complex / enzyme-linked receptor protein signaling pathway / Translocation of ZAP-70 to Immunological synapse / Phosphorylation of CD3 and TCR zeta chains / positive regulation of protein kinase activity / regulation of calcium ion transport / positive regulation of calcium ion transport into cytosol / macrophage differentiation / Generation of second messenger molecules / immunoglobulin binding / T cell differentiation / Co-inhibition by PD-1 / Binding and entry of HIV virion / coreceptor activity / positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of T cell proliferation / positive regulation of interleukin-2 production / positive regulation of calcium-mediated signaling / cell surface receptor protein tyrosine kinase signaling pathway / protein tyrosine kinase binding / host cell endosome membrane / Vpu mediated degradation of CD4 / clathrin-coated endocytic vesicle membrane / calcium-mediated signaling / positive regulation of protein phosphorylation / MHC class II protein complex binding / transmembrane signaling receptor activity / Downstream TCR signaling / response to estradiol / Cargo recognition for clathrin-mediated endocytosis / signaling receptor activity / Clathrin-mediated endocytosis / virus receptor activity / response to ethanol / defense response to Gram-negative bacterium / clathrin-dependent endocytosis of virus by host cell / adaptive immune response / positive regulation of viral entry into host cell / early endosome / cell surface receptor signaling pathway / positive regulation of ERK1 and ERK2 cascade / positive regulation of canonical NF-kappaB signal transduction / cell adhesion / positive regulation of MAPK cascade / viral protein processing / immune response / membrane raft / endoplasmic reticulum lumen / fusion of virus membrane with host plasma membrane / external side of plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / lipid binding / symbiont entry into host cell / endoplasmic reticulum membrane / protein kinase binding / positive regulation of DNA-templated transcription / virion attachment to host cell / host cell plasma membrane / virion membrane / structural molecule activity / enzyme binding / signal transduction / protein homodimerization activity / zinc ion binding / identical protein binding / membrane / 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 speciesHuman immunodeficiency virus 1
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 8.9 Å
AuthorsWang, H. / Bjorkman, P.J.
Funding support United States, 3items
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
DepositionSep 30, 2016Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 16, 2016Provider: repository / Type: Initial release
Revision 1.1Nov 30, 2016Group: Database references
Revision 1.2Sep 27, 2017Group: Author supporting evidence / Data collection / Database references
Category: citation / em_image_scans ...citation / em_image_scans / em_software / pdbx_audit_support
Item: _citation.journal_id_CSD / _em_software.name / _pdbx_audit_support.funding_organization
Revision 1.3Jul 18, 2018Group: Data collection / Category: em_software / Item: _em_software.name
Revision 1.4Oct 3, 2018Group: Data collection / Other ...Data collection / Other / Refinement description / Structure summary
Category: cell / em_entity_assembly / refine
Item: _cell.Z_PDB / _cell.length_a ..._cell.Z_PDB / _cell.length_a / _cell.length_b / _cell.length_c / _em_entity_assembly.entity_id_list
Revision 1.5Dec 11, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.6Dec 18, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3]
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_validate_close_contact / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_entity_id / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_close_contact.auth_asym_id_2 / _pdbx_validate_close_contact.auth_seq_id_2 / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 23, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature / struct_conn
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _struct_conn.pdbx_leaving_atom_flag

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Structure visualization

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Assembly

Deposited unit
A: BG505 SOSIP gp41
B: BG505 SOSIP gp41
C: BG505 SOSIP gp41
D: BG505 SOSIP gp120
E: BG505 SOSIP gp120
F: BG505 SOSIP gp120
G: T-cell surface glycoprotein CD4
H: T-cell surface glycoprotein CD4
I: T-cell surface glycoprotein CD4
J: 17b Fab VL domain
K: 17b Fab VL domain
L: 17b Fab VL domain
M: 17b Fab VH domain
N: 17b Fab VH domain
O: 17b Fab VH domain
P: 8ANC195 G52K5 VH domain
Q: 8ANC195 G52K5 VL domain
R: 8ANC195 G52K5 VH domain
S: 8ANC195 G52K5 VL domain
T: 8ANC195 G52K5 VH domain
U: 8ANC195 G52K5 VL domain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)577,91430
Polymers570,20321
Non-polymers7,7119
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Protein , 3 types, 9 molecules ABCDEFGHI

#1: Protein BG505 SOSIP gp41


Mass: 17146.482 Da / Num. of mol.: 3 / Fragment: UNP residues 509-661
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: env / Cell line (production host): HEK 293 6E / Production host: Homo sapiens (human) / References: UniProt: Q2N0S6
#2: Protein BG505 SOSIP gp120


Mass: 54064.277 Da / Num. of mol.: 3 / Fragment: UNP residue 30-505
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: env / Cell line (production host): HEK 293 6E / Production host: Homo sapiens (human) / References: UniProt: Q2N0S6
#3: Protein T-cell surface glycoprotein CD4 / T-cell surface antigen T4/Leu-3


Mass: 21472.350 Da / Num. of mol.: 3 / Fragment: UNP residues 26-207
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CD4 / Cell line (production host): Hi5 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P01730

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8ANC195 G52K5 ... , 1 types, 3 molecules PRT

#6: Protein 8ANC195 G52K5 VH domain


Mass: 26125.270 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): HEK 293 6E / Production host: Homo sapiens (human)

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Antibody , 3 types, 9 molecules JKLMNOQSU

#4: Antibody 17b Fab VL domain


Mass: 23399.898 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): HEK 293 6E / Production host: Homo sapiens (human)
#5: Antibody 17b Fab VH domain


Mass: 24457.387 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): HEK 293 6E / Production host: Homo sapiens (human)
#7: Antibody 8ANC195 G52K5 VL domain


Mass: 23401.984 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell line (production host): HEK 293 6E / Production host: Homo sapiens (human)

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Sugars , 2 types, 9 molecules

#8: Polysaccharide alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1- ...alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 748.682 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,4,3/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3/a4-b1_b4-c1_c3-d1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#9: Polysaccharide
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/3,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3/a4-b1_b4-c1_c3-d1_c6-e1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE

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Details

Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeEntity IDParent-IDSource
1BG505 SOSIP-sCD4-17b-8ANC195 complexCOMPLEX#1-#70MULTIPLE SOURCES
2CD4 D1-D2 domainORGANELLE OR CELLULAR COMPONENT#31RECOMBINANT
317b FabCOMPLEX#4-#51RECOMBINANT
4BG505 SOSIP trimerCOMPLEX#1-#21RECOMBINANT
58ANC195 G52K5 FabCOMPLEX#6-#71RECOMBINANT
Molecular weight
IDEntity assembly-IDValue (°)Experimental value
110.8 MDaNO
210.02 MDaNO
310.05 MDaNO
410.483 MDaNO
510.05 MDaNO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Homo sapiens (human)9606
34Human immunodeficiency virus 111676
45Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-IDCellPlasmid
12Spodoptera frugiperda (fall armyworm)7108baculovirus-infected Hi5 insect cellspVL1393
23Homo sapiens (human)9606HEK 293 6EpTT5
34Homo sapiens (human)9606pTT5
45Homo sapiens (human)9606pTT5
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Cs: 2.7 mm
Image recordingAverage exposure time: 3.5 sec. / Electron dose: 35 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: REFMAC / Version: 5.8.0155 / Classification: refinement
EM software
IDNameCategory
1EMAN2particle selection
2SerialEMimage acquisition
4CTFFIND4CTF correction
7UCSF Chimeramodel fitting
9RELIONinitial Euler assignment
10RELIONfinal Euler assignment
11RELIONclassification
12RELION3D reconstruction
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C3 (3 fold cyclic)
3D reconstructionResolution: 8.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 5175 / Algorithm: FOURIER SPACE / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Details: phenix_real.space.refine
RefinementResolution: 8.9→319.8 Å / Cor.coef. Fo:Fc: 0.906 / SU B: 468.507 / SU ML: 2.973
Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES
RfactorNum. reflection% reflection
Rwork0.41466 --
obs0.41466 97223 100 %
Solvent computationSolvent model: PARAMETERS FOR MASK CACLULATION
Displacement parametersBiso mean: 373.323 Å2
Baniso -1Baniso -2Baniso -3
1--5.55 Å2-1.07 Å20.1 Å2
2---8.95 Å2-0.18 Å2
3---14.5 Å2
Refinement stepCycle: 1 / Total: 25053
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
ELECTRON MICROSCOPYr_bond_refined_d0.0110.01925661
ELECTRON MICROSCOPYr_bond_other_d
ELECTRON MICROSCOPYr_angle_refined_deg1.6591.96134933
ELECTRON MICROSCOPYr_angle_other_deg
ELECTRON MICROSCOPYr_dihedral_angle_1_deg7.84253132
ELECTRON MICROSCOPYr_dihedral_angle_2_deg36.33524.511091
ELECTRON MICROSCOPYr_dihedral_angle_3_deg20.397154117
ELECTRON MICROSCOPYr_dihedral_angle_4_deg15.23115126
ELECTRON MICROSCOPYr_chiral_restr0.1040.24015
ELECTRON MICROSCOPYr_gen_planes_refined0.0050.02119019
ELECTRON MICROSCOPYr_gen_planes_other
ELECTRON MICROSCOPYr_nbd_refined
ELECTRON MICROSCOPYr_nbd_other
ELECTRON MICROSCOPYr_nbtor_refined
ELECTRON MICROSCOPYr_nbtor_other
ELECTRON MICROSCOPYr_xyhbond_nbd_refined
ELECTRON MICROSCOPYr_xyhbond_nbd_other
ELECTRON MICROSCOPYr_metal_ion_refined
ELECTRON MICROSCOPYr_metal_ion_other
ELECTRON MICROSCOPYr_symmetry_vdw_refined
ELECTRON MICROSCOPYr_symmetry_vdw_other
ELECTRON MICROSCOPYr_symmetry_hbond_refined
ELECTRON MICROSCOPYr_symmetry_hbond_other
ELECTRON MICROSCOPYr_symmetry_metal_ion_refined
ELECTRON MICROSCOPYr_symmetry_metal_ion_other
ELECTRON MICROSCOPYr_mcbond_it13.64837.94512645
ELECTRON MICROSCOPYr_mcbond_other
ELECTRON MICROSCOPYr_mcangle_it24.37856.87515738
ELECTRON MICROSCOPYr_mcangle_other
ELECTRON MICROSCOPYr_scbond_it11.00437.16813016
ELECTRON MICROSCOPYr_scbond_other
ELECTRON MICROSCOPYr_scangle_it
ELECTRON MICROSCOPYr_scangle_other
ELECTRON MICROSCOPYr_long_range_B_refined57.50982760
ELECTRON MICROSCOPYr_long_range_B_other
ELECTRON MICROSCOPYr_rigid_bond_restr
ELECTRON MICROSCOPYr_sphericity_free
ELECTRON MICROSCOPYr_sphericity_bonded
LS refinement shellResolution: 8.901→9.132 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rwork0.509 7182 -
Rfree-0 -
obs--100 %

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