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Basic information

Entry
Database: PDB / ID: 9npm
TitleComposite map of three pairs of dimeric VRC36 Fabs bound to HIV-1 BG505.T332N DS-SOSIP.664 Env trimer
Components
  • (HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein ...) x 2
  • VRC36 Fab heavy chain
  • VRC36 Fab light chain
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / HIV-1 / N-linked glycan / high mannose / broadly neutralizing antibody / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


membrane fusion involved in viral entry into host cell / positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / symbiont-mediated perturbation of host defense response / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope ...membrane fusion involved in viral entry into host cell / positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / symbiont-mediated perturbation of host defense response / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / symbiont entry into host cell / virion attachment to host cell / host cell plasma membrane / virion membrane / structural molecule activity / membrane
Similarity search - Function
Envelope glycoprotein Gp160 / Retroviral envelope protein / Retroviral envelope protein GP41-like / Gp120 core superfamily / Envelope glycoprotein GP120 / Human immunodeficiency virus 1, envelope glycoprotein Gp120
Similarity search - Domain/homology
Envelope glycoprotein gp160 / Envelope glycoprotein gp160
Similarity search - Component
Biological speciesHuman immunodeficiency virus 1
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.59 Å
AuthorsCheng, J. / Cale, E.M. / Longo, N. / Sutton, M.S. / Lei, H. / Huang, R. / Morton, A.J. / Lang, Z.C. / Morano, N.C. / Roark, R.S. ...Cheng, J. / Cale, E.M. / Longo, N. / Sutton, M.S. / Lei, H. / Huang, R. / Morton, A.J. / Lang, Z.C. / Morano, N.C. / Roark, R.S. / Becker, J.E. / Tsybovsky, Y. / Li, N. / Zhang, B. / Du, H. / Rubin, S. / Shapiro, L. / Pierson, T.C. / Doria-Rose, N.A. / Zhou, T. / Kwong, P.D.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
CitationJournal: Adv Sci (Weinh) / Year: 2026
Title: Canonical Antibodies Adopt Distinct Binding Modes to Recognize Viral Glycan Shields.
Authors: Jiaxuan Cheng / Evan M Cale / Amirabbas Maghsoudi / Matthew S Sutton / Nancy S Longo / Rebecca A Gillespie / Lingshu Wang / Ivan Kosik / Sue Chong / Atsuhiro Yasuhara / Tatsiana Bylund / ...Authors: Jiaxuan Cheng / Evan M Cale / Amirabbas Maghsoudi / Matthew S Sutton / Nancy S Longo / Rebecca A Gillespie / Lingshu Wang / Ivan Kosik / Sue Chong / Atsuhiro Yasuhara / Tatsiana Bylund / Arne Schön / Prabhanshu Tripathi / Yaroslav Tsybovsky / Haotian Lei / Nicholas C Morano / Allison B Lupatkin / Abraham J Morton / Zabrina C Lang / Jordan E Becker / Isabella R Frascilla / Myungjin Lee / Ning Li / Cuiping Liu / Ryan S Roark / Chen-Hsiang Shen / I-Ting Teng / David J Van Wazer / Danyi Wang / Lingyuan Wu / Goran Ahlsen / Mike Castro / Haijuan Du / Michael J Ernandes / Tiansheng Li / Bob C Lin / Mark K Louder / Krisha McKee / Jonah S Merriam / Sijy O'Dell / Li Ou / Sergei Pletnev / David Prikryl / Qi Qiu / Sarah Rubin / Mallika Sastry / Stephen D Schmidt / Asif Shajahan / Andrea R Shiakolas / Sanjay Srivatsan / Baoshan Zhang / Qiong Zhou / Mark Connors / Jason G Gall / Yicheng Guo / Rick K Huang / Yaoxing Huang / Richard A Koup / Q Paula Lei / John R Mascola / Reda Rawi / Leonid Serebryannyy / Lawrence Shapiro / Zizhang Sheng / David D Ho / Patrick C Wilson / Jonathan W Yewdell / Theodore C Pierson / Masaru Kanekiyo / Nicole A Doria-Rose / Peter D Kwong / Tongqing Zhou /
Abstract: Viral entry glycoproteins are often shielded from immune recognition by dense N-linked glycans that limit antibody access to protein epitopes. While glycan-reactive antibodies with unusual ...Viral entry glycoproteins are often shielded from immune recognition by dense N-linked glycans that limit antibody access to protein epitopes. While glycan-reactive antibodies with unusual architectures have been described, how canonical Y-shaped antibodies engage these glycan-rich surfaces remains poorly defined. Here, we characterize two human antibodies, VRC35 and VRC36, isolated from an HIV-1-infected donor, that recognize diverse glycosylated viral glycoproteins. Cryo-electron microscopy structural analyses of these antibodies in complex with viral entry glycoproteins, including HIV-1 envelope, influenza hemagglutinin, SARS-CoV-2 spike, and the Lassa virus glycoprotein complex, reveal adaptive Fab stoichiometries ranging from single-Fab binding to dimeric and higher-order assemblies are mediated by intra- and inter-IgG interactions that depend on local glycan organization. Dense glycan clustering on HIV-1 and influenza glycoproteins supports multivalent Fab assemblies and correlates with neutralization activity, whereas sparse glycan environments on SARS-CoV-2 and Lassa virus favor weak or heterogeneous engagement without neutralization. Structural and mutational analyses further demonstrate that homotypic Fab-Fab interactions stabilize multivalent engagement and contribute to neutralizing activity. Together, these findings define a structural framework in which viral glycan organization constrains antibody valency and engagement, while somatic hypermutation contributes to the acquisition of homotypic Fab-Fab interactions that facilitate multivalent recognition of viral glycan shields.
History
DepositionMar 11, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 19, 2026Provider: repository / Type: Initial release
Revision 1.0Aug 19, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.1Sep 9, 2026Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.1Sep 9, 2026Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / EM metadata / Category: citation / citation_author / em_admin
Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
C: HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp120
D: HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp41
K: VRC36 Fab heavy chain
L: VRC36 Fab light chain
M: VRC36 Fab heavy chain
N: VRC36 Fab light chain
E: HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp120
F: HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp41
O: VRC36 Fab heavy chain
P: VRC36 Fab light chain
Q: VRC36 Fab heavy chain
R: VRC36 Fab light chain
A: HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp120
B: HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp41
G: VRC36 Fab heavy chain
H: VRC36 Fab light chain
I: VRC36 Fab heavy chain
J: VRC36 Fab light chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)528,98467
Polymers496,07718
Non-polymers32,90749
Water00
1


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

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Components

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HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein ... , 2 types, 6 molecules CEADFB

#1: Protein HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein gp120 / Env polyprotein


Mass: 53200.469 Da / Num. of mol.: 3 / Fragment: UNP residues 30-505
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: env / Production host: Homo sapiens (human) / References: UniProt: A0A6H1VH54
#2: Protein HIV-1 BG505.T332N DS-SOSIP.664 Env glycoprotein 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 / Production host: Homo sapiens (human) / References: UniProt: Q2N0S5

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Antibody , 2 types, 12 molecules KMOQGILNPRHJ

#3: Antibody
VRC36 Fab heavy chain


Mass: 24125.166 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#4: Antibody
VRC36 Fab light chain


Mass: 23380.910 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)

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Sugars , 9 types, 49 molecules

#5: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 12
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#6: 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-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}}}}LINUCSPDB-CARE
#7: Polysaccharide alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-2)-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: 1559.386 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-2DManpa1-3[DManpa1-6]DManpa1-6[DManpa1-2DManpa1-3]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,9,8/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3-3-3-3/a4-b1_b4-c1_c3-d1_c6-f1_d2-e1_f3-g1_f6-i1_g2-h1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}[(6+1)][a-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}[(6+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#8: Polysaccharide
alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[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: 1397.245 Da / Num. of mol.: 5
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-2DManpa1-2DManpa1-3[DManpa1-3DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,8,7/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3-3-3/a4-b1_b4-c1_c3-d1_c6-g1_d2-e1_e2-f1_g3-h1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}}[(6+1)][a-D-Manp]{[(3+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#9: Polysaccharide
alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[alpha-D-mannopyranose-(1-3)]beta-D- ...alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)-[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: 1072.964 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpa1-6[DManpa1-3]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3/a4-b1_b4-c1_c3-d1_c6-e1_e3-f1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{[(3+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#10: 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.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam 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
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}}LINUCSPDB-CARE
#11: Polysaccharide alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-2)-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: 1072.964 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-2DManpa1-2DManpa1-3DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3/a4-b1_b4-c1_c3-d1_d2-e1_e2-f1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}}}}}LINUCSPDB-CARE
#12: Polysaccharide alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose


Type: oligosaccharide / Mass: 342.297 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3DManpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a1122h-1a_1-5]/1-1/a3-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-Manp]{[(3+1)][a-D-Manp]{}}LINUCSPDB-CARE
#13: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 15
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Details

Has ligand of interestY
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

ComponentName: Three pairs of dimeric VRC36 Fabs in complex with HIV-1 BG505.T332N DS-SOSIP.664 Env
Type: COMPLEX / Entity ID: #1-#4 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 70.53 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.59 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 111000 / Symmetry type: POINT
RefinementHighest resolution: 3.59 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00536674
ELECTRON MICROSCOPYf_angle_d0.8649839
ELECTRON MICROSCOPYf_dihedral_angle_d7.2886122
ELECTRON MICROSCOPYf_chiral_restr0.0476143
ELECTRON MICROSCOPYf_plane_restr0.0066125

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