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- PDB-7mkm: SARS-CoV-2 Spike RBD in complex with neutralizing Fab SARS2-38 (l... -

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Basic information

Entry
Database: PDB / ID: 7mkm
TitleSARS-CoV-2 Spike RBD in complex with neutralizing Fab SARS2-38 (local refinement)
Components
  • SARS2-38 Fv heavy chain
  • SARS2-38 Fv light chain
  • Spike protein S1
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / Glycoprotein / Antibody / VIRAL PROTEIN-IMMUNE SYSTEM complex / Structural Genomics / Center for Structural Genomics of Infectious Diseases / CSGID
Function / homology
Function and homology information


Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane ...Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / suppression by virus of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / entry receptor-mediated virion attachment to host cell / receptor-mediated endocytosis of virus by host cell / Attachment and Entry / membrane fusion / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / membrane / identical protein binding / plasma membrane
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike glycoprotein, betacoronavirus / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal
Similarity search - Domain/homology
Biological speciesSevere acute respiratory syndrome coronavirus 2
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.16 Å
AuthorsAdams, L.J. / Fremont, D.H. / Center for Structural Genomics of Infectious Diseases (CSGID)
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)75N93019C00062 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)HHSN272201700060C United States
Citation
Journal: Immunity / Year: 2021
Title: A potently neutralizing SARS-CoV-2 antibody inhibits variants of concern by utilizing unique binding residues in a highly conserved epitope.
Authors: Laura A VanBlargan / Lucas J Adams / Zhuoming Liu / Rita E Chen / Pavlo Gilchuk / Saravanan Raju / Brittany K Smith / Haiyan Zhao / James Brett Case / Emma S Winkler / Bradley M Whitener / ...Authors: Laura A VanBlargan / Lucas J Adams / Zhuoming Liu / Rita E Chen / Pavlo Gilchuk / Saravanan Raju / Brittany K Smith / Haiyan Zhao / James Brett Case / Emma S Winkler / Bradley M Whitener / Lindsay Droit / Ishmael D Aziati / Traci L Bricker / Astha Joshi / Pei-Yong Shi / Adrian Creanga / Amarendra Pegu / Scott A Handley / David Wang / Adrianus C M Boon / James E Crowe / Sean P J Whelan / Daved H Fremont / Michael S Diamond /
Abstract: With the emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants with increased transmissibility and potential resistance, antibodies and vaccines with broadly inhibitory ...With the emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants with increased transmissibility and potential resistance, antibodies and vaccines with broadly inhibitory activity are needed. Here, we developed a panel of neutralizing anti-SARS-CoV-2 monoclonal antibodies (mAbs) that bound the receptor binding domain of the spike protein at distinct epitopes and blocked virus attachment to its host receptor, human angiotensin converting enzyme-2 (hACE2). Although several potently neutralizing mAbs protected K18-hACE2 transgenic mice against infection caused by ancestral SARS-CoV-2 strains, others induced escape variants in vivo or lost neutralizing activity against emerging strains. One mAb, SARS2-38, potently neutralized all tested SARS-CoV-2 variants of concern and protected mice against challenge by multiple SARS-CoV-2 strains. Structural analysis showed that SARS2-38 engaged a conserved epitope proximal to the receptor binding motif. Thus, treatment with or induction of neutralizing antibodies that bind conserved spike epitopes may limit the loss of potency of therapies or vaccines against emerging SARS-CoV-2 variants.
#1: Journal: bioRxiv / Year: 2021
Title: A potently neutralizing anti-SARS-CoV-2 antibody inhibits variants of concern by binding a highly conserved epitope.
Authors: Laura VanBlargan / Lucas Adams / Zhuoming Liu / Rita E Chen / Pavlo Gilchuk / Saravanan Raju / Brittany Smith / Haiyan Zhao / James Brett Case / Emma S Winkler / Bradley Whitener / Lindsay ...Authors: Laura VanBlargan / Lucas Adams / Zhuoming Liu / Rita E Chen / Pavlo Gilchuk / Saravanan Raju / Brittany Smith / Haiyan Zhao / James Brett Case / Emma S Winkler / Bradley Whitener / Lindsay Droit / Ismael Aziati / Pei-Yong Shi / Adrian Creanga / Amarendra Pegu / Scott Handley / David Wang / Adrianus Boon / James E Crowe / Sean P J Whelan / Daved Fremont / Michael Diamond
Abstract: With the emergence of SARS-CoV-2 variants with increased transmissibility and potential resistance, antibodies and vaccines with broadly inhibitory activity are needed. Here we developed a panel of ...With the emergence of SARS-CoV-2 variants with increased transmissibility and potential resistance, antibodies and vaccines with broadly inhibitory activity are needed. Here we developed a panel of neutralizing anti-SARS-CoV-2 mAbs that bind the receptor binding domain of the spike protein at distinct epitopes and block virus attachment to cells and its receptor, human angiotensin converting enzyme-2 (hACE2). While several potently neutralizing mAbs protected K18-hACE2 transgenic mice against infection caused by historical SARS-CoV-2 strains, others induced escape variants in vivo and lost activity against emerging strains. We identified one mAb, SARS2-38, that potently neutralizes all SARS-CoV-2 variants of concern tested and protects mice against challenge by multiple SARS-CoV-2 strains. Structural analysis showed that SARS2-38 engages a conserved epitope proximal to the receptor binding motif. Thus, treatment with or induction of inhibitory antibodies that bind conserved spike epitopes may limit the loss of potency of therapies or vaccines against emerging SARS-CoV-2 variants.
History
DepositionApr 24, 2021Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 12, 2021Provider: repository / Type: Initial release
Revision 2.0Aug 4, 2021Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Polymer sequence / Refinement description / Source and taxonomy / Structure summary
Category: atom_site / atom_site_anisotrop ...atom_site / atom_site_anisotrop / em_software / entity / entity_poly / entity_poly_seq / entity_src_gen / entity_src_nat / pdbx_poly_seq_scheme / pdbx_struct_sheet_hbond / pdbx_validate_close_contact / pdbx_validate_peptide_omega / pdbx_validate_torsion / refine_ls_restr / software / struct_conf / struct_conn / struct_mon_prot_cis / struct_ref / struct_ref_seq / struct_sheet / struct_sheet_order / struct_sheet_range
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_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.label_seq_id / _atom_site.type_symbol / _atom_site_anisotrop.U[1][1] / _atom_site_anisotrop.U[2][2] / _atom_site_anisotrop.U[3][3] / _atom_site_anisotrop.id / _atom_site_anisotrop.pdbx_label_asym_id / _em_software.category / _em_software.fitting_id / _em_software.imaging_id / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_fragment / _entity.src_method / _entity_poly.pdbx_seq_one_letter_code / _entity_poly.pdbx_seq_one_letter_code_can / _entity_poly.pdbx_strand_id / _entity_poly_seq.entity_id / _entity_poly_seq.mon_id / _entity_poly_seq.num / _entity_src_gen.entity_id / _entity_src_nat.entity_id / _pdbx_poly_seq_scheme.asym_id / _pdbx_poly_seq_scheme.auth_mon_id / _pdbx_poly_seq_scheme.auth_seq_num / _pdbx_poly_seq_scheme.entity_id / _pdbx_poly_seq_scheme.mon_id / _pdbx_poly_seq_scheme.ndb_seq_num / _pdbx_poly_seq_scheme.pdb_mon_id / _pdbx_poly_seq_scheme.pdb_seq_num / _pdbx_poly_seq_scheme.pdb_strand_id / _pdbx_poly_seq_scheme.seq_id / _refine_ls_restr.dev_ideal / _refine_ls_restr.number / _software.version / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_seq_id / _struct_ref.db_code / _struct_ref.db_name / _struct_ref.pdbx_align_begin / _struct_ref.pdbx_db_accession / _struct_ref.pdbx_seq_one_letter_code / _struct_ref_seq.db_align_beg / _struct_ref_seq.db_align_end / _struct_ref_seq.pdbx_auth_seq_align_beg / _struct_ref_seq.pdbx_auth_seq_align_end / _struct_ref_seq.pdbx_db_accession / _struct_ref_seq.pdbx_strand_id / _struct_ref_seq.seq_align_end / _struct_sheet.number_strands
Description: Polymer geometry / Provider: author / Type: Coordinate replacement
Revision 2.1Dec 1, 2021Group: Database references / Category: citation / citation_author / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Assembly

Deposited unit
A: Spike protein S1
H: SARS2-38 Fv heavy chain
L: SARS2-38 Fv light chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)45,3804
Polymers45,1583
Non-polymers2211
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Spike protein S1


Mass: 21247.758 Da / Num. of mol.: 1 / Fragment: receptor binding domain (UNP residues 333-520)
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Gene: S, 2 / Cell line (production host): Expi293F / Production host: Homo sapiens (human) / References: UniProt: P0DTC2
#2: Antibody SARS2-38 Fv heavy chain


Mass: 12490.882 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse)
#3: Antibody SARS2-38 Fv light chain


Mass: 11419.787 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: P0DTC2*PLUS
#4: 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 / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H15NO6
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
Has ligand of interestN

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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: SARS-CoV-2 spike bound by SARS2-38 antibody Fab / Type: COMPLEX / Entity ID: #1-#3 / Source: MULTIPLE SOURCES
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
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: 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 FIELDBright-field microscopy
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
EM softwareName: cryoSPARC / Version: 3.1.0 / Category: 3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.16 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 272007 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0023276
ELECTRON MICROSCOPYf_angle_d0.8034457
ELECTRON MICROSCOPYf_dihedral_angle_d13.1131161
ELECTRON MICROSCOPYf_chiral_restr0.047480
ELECTRON MICROSCOPYf_plane_restr0.006572

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