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- EMDB-26677: Three RBD-down state of SARS-CoV-2 D614G spike in complex with th... -

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Entry
Database: EMDB / ID: EMD-26677
TitleThree RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)
Map dataspike protein RBD domain with fab density
Sample
  • Complex: three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)
    • Complex: Spike glycoprotein
      • Protein or peptide: Spike glycoprotein
    • Complex: SP1-77 Fab heavy chain, SP1-77 Fab light chain
      • Protein or peptide: SP1-77 Fab heavy chain
      • Protein or peptide: SP1-77 Fab light chain
KeywordsVIRAL PROTEIN
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 / entry receptor-mediated virion attachment to host cell ...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 / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated endocytosis of virus by host cell / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / receptor ligand activity / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / identical protein binding / membrane / 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 / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, betacoronavirus / Spike glycoprotein, N-terminal domain superfamily / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / 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 1 (HR1) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Biological speciesSevere acute respiratory syndrome coronavirus 2 / Homo sapiens (human) / Severe acute respiratory syndrome coronavirus
Methodsingle particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsZhang J / Luo S / Kreutzberger A / Kirchhausen T / Chen B / Haynes B / Alt F
Funding support United States, 4 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI)INV-021989 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI127193 United States
Massachusetts Consortium on Pathogen Readiness (MassCPR)SARS-CoV-2 Variants Award United States
Mercatus CenterEmergent Ventures Fast Grant United States
CitationJournal: Sci Immunol / Year: 2022
Title: An antibody from single human V-rearranging mouse neutralizes all SARS-CoV-2 variants through BA.5 by inhibiting membrane fusion.
Authors: Sai Luo / Jun Zhang / Alex J B Kreutzberger / Amanda Eaton / Robert J Edwards / Changbin Jing / Hai-Qiang Dai / Gregory D Sempowski / Kenneth Cronin / Robert Parks / Adam Yongxin Ye / ...Authors: Sai Luo / Jun Zhang / Alex J B Kreutzberger / Amanda Eaton / Robert J Edwards / Changbin Jing / Hai-Qiang Dai / Gregory D Sempowski / Kenneth Cronin / Robert Parks / Adam Yongxin Ye / Katayoun Mansouri / Maggie Barr / Novalia Pishesha / Aimee Chapdelaine Williams / Lucas Vieira Francisco / Anand Saminathan / Hanqin Peng / Himanshu Batra / Lorenza Bellusci / Surender Khurana / S Munir Alam / David C Montefiori / Kevin O Saunders / Ming Tian / Hidde Ploegh / Tom Kirchhausen / Bing Chen / Barton F Haynes / Frederick W Alt /
Abstract: SARS-CoV-2 Omicron subvariants have generated a worldwide health crisis due to resistance to most approved SARS-CoV-2 neutralizing antibodies and evasion of vaccination-induced antibodies. To manage ...SARS-CoV-2 Omicron subvariants have generated a worldwide health crisis due to resistance to most approved SARS-CoV-2 neutralizing antibodies and evasion of vaccination-induced antibodies. To manage Omicron subvariants and prepare for new ones, additional means of isolating broad and potent humanized SARS-CoV-2 neutralizing antibodies are desirable. Here, we describe a mouse model in which the primary B cell receptor (BCR) repertoire is generated solely through V(D)J recombination of a human V1-2 heavy chain (HC) and, substantially, a human Vκ1-33 light chain (LC). Thus, primary humanized BCR repertoire diversity in these mice derives from immensely diverse HC and LC antigen-contact CDR3 sequences generated by nontemplated junctional modifications during V(D)J recombination. Immunizing this mouse model with SARS-CoV-2 (Wuhan-Hu-1) spike protein immunogens elicited several V1-2/Vκ1-33-based neutralizing antibodies that bound RBD in a different mode from each other and from those of many prior patient-derived V1-2-based neutralizing antibodies. Of these, SP1-77 potently and broadly neutralized all SARS-CoV-2 variants through BA.5. Cryo-EM studies revealed that SP1-77 bound RBD away from the receptor-binding motif via a CDR3-dominated recognition mode. Lattice light-sheet microscopy-based studies showed that SP1-77 did not block ACE2-mediated viral attachment or endocytosis but rather blocked viral-host membrane fusion. The broad and potent SP1-77 neutralization activity and nontraditional mechanism of action suggest that it might have therapeutic potential. Likewise, the SP1-77 binding epitope may inform vaccine strategies. Last, the type of humanized mouse models that we have described may contribute to identifying therapeutic antibodies against future SARS-CoV-2 variants and other pathogens.
History
DepositionApr 18, 2022-
Header (metadata) releaseAug 10, 2022-
Map releaseAug 10, 2022-
UpdateOct 9, 2024-
Current statusOct 9, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_26677.png

Downloads & links

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Map

FileDownload / File: emd_26677.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationspike protein RBD domain with fab density
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 480 pix.
= 398.4 Å		0.83 Å/pix.
x 480 pix.
= 398.4 Å		0.83 Å/pix.
x 480 pix.
= 398.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.83 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.18
Minimum - Maximum-1.3868686 - 1.7328814
Average (Standard dev.)0.0002472785 (±0.018119883)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions480480480
Spacing480480480
CellA=B=C: 398.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : three RBD-down state of SARS-CoV-2 D614G spike in complex with th...

EntireName: three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)
Components
  • Complex: three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)
    • Complex: Spike glycoprotein
      • Protein or peptide: Spike glycoprotein
    • Complex: SP1-77 Fab heavy chain, SP1-77 Fab light chain
      • Protein or peptide: SP1-77 Fab heavy chain
      • Protein or peptide: SP1-77 Fab light chain

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Supramolecule #1: three RBD-down state of SARS-CoV-2 D614G spike in complex with th...

SupramoleculeName: three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Details: three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)
Molecular weightTheoretical: 6.5 MDa

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Supramolecule #2: Spike glycoprotein

SupramoleculeName: Spike glycoprotein / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #3: SP1-77 Fab heavy chain, SP1-77 Fab light chain

SupramoleculeName: SP1-77 Fab heavy chain, SP1-77 Fab light chain / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus
Molecular weightTheoretical: 144.858031 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF ...String:
MFVFLVLLPL VSSQCVNLTT RTQLPPAYTN SFTRGVYYPD KVFRSSVLHS TQDLFLPFFS NVTWFHAIHV SGTNGTKRFD NPVLPFNDG VYFASTEKSN IIRGWIFGTT LDSKTQSLLI VNNATNVVIK VCEFQFCNDP FLGVYYHKNN KSWMESEFRV Y SSANNCTF EYVSQPFLMD LEGKQGNFKN LREFVFKNID GYFKIYSKHT PINLVRDLPQ GFSALEPLVD LPIGINITRF QT LLALHRS YLTPGDSSSG WTAGAAAYYV GYLQPRTFLL KYNENGTITD AVDCALDPLS ETKCTLKSFT VEKGIYQTSN FRV QPTESI VRFPNITNLC PFGEVFNATR FASVYAWNRK RISNCVADYS VLYNSASFST FKCYGVSPTK LNDLCFTNVY ADSF VIRGD EVRQIAPGQT GKIADYNYKL PDDFTGCVIA WNSNNLDSKV GGNYNYLYRL FRKSNLKPFE RDISTEIYQA GSTPC NGVE GFNCYFPLQS YGFQPTNGVG YQPYRVVVLS FELLHAPATV CGPKKSTNLV KNKCVNFNFN GLTGTGVLTE SNKKFL PFQ QFGRDIADTT DAVRDPQTLE ILDITPCSFG GVSVITPGTN TSNQVAVLYQ GVNCTEVPVA IHADQLTPTW RVYSTGS NV FQTRAGCLIG AEHVNNSYEC DIPIGAGICA SYQTQTNSPR RARSVASQSI IAYTMSLGAE NSVAYSNNSI AIPTNFTI S VTTEILPVSM TKTSVDCTMY ICGDSTECSN LLLQYGSFCT QLNRALTGIA VEQDKNTQEV FAQVKQIYKT PPIKDFGGF NFSQILPDPS KPSKRSFIED LLFNKVTLAD AGFIKQYGDC LGDIAARDLI CAQKFNGLTV LPPLLTDEMI AQYTSALLAG TITSGWTFG AGAALQIPFA MQMAYRFNGI GVTQNVLYEN QKLIANQFNS AIGKIQDSLS STASALGKLQ DVVNQNAQAL N TLVKQLSS NFGAISSVLN DILSRLDKVE AEVQIDRLIT GRLQSLQTYV TQQLIRAAEI RASANLAATK MSECVLGQSK RV DFCGKGY HLMSFPQSAP HGVVFLHVTY VPAQEKNFTT APAICHDGKA HFPREGVFVS NGTHWFVTQR NFYEPQIITT DNT FVSGNC DVVIGIVNNT VYDPLQPELD SFKEELDKYF KNHTSPDVDL GDISGINASV VNIQKEIDRL NEVAKNLNES LIDL QELGK YEQYIKWPWY IWLGFIAGLI AIVMVTIMLC CMTSCCSCLK GCCSCGSCCK FDEDDSEPVL KGVKLHYTLE SGGGS AWSH PQFEKGGGSG GGSGGSSAWS HPQFEK

UniProtKB: Spike glycoprotein

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Macromolecule #2: SP1-77 Fab heavy chain

MacromoleculeName: SP1-77 Fab heavy chain / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 49.665703 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QVQLVQSGAE VKKPGASVKV SCKASGYTFT GTYIHWVRQA PGQGLEWMGW INPNSGGTNF AQIFQGRVTL TRDTSISTAY MDLNRLKSD DTAVYYCARD RVLYGRSFGW YFDVWGAGTT VTVSSASTKG PSVFPLAPCS RSTSESTAAL GCLVKDYFPE P VTVSWNSG ...String:
QVQLVQSGAE VKKPGASVKV SCKASGYTFT GTYIHWVRQA PGQGLEWMGW INPNSGGTNF AQIFQGRVTL TRDTSISTAY MDLNRLKSD DTAVYYCARD RVLYGRSFGW YFDVWGAGTT VTVSSASTKG PSVFPLAPCS RSTSESTAAL GCLVKDYFPE P VTVSWNSG ALTSGVHTFP AVLQSSGLYS LSSVVTVPSS SLGTKTYTCN VDHKPSNTKV DKRVESKYGP PCPSCPAPEF LG GPSVFLF PPKPKDTLMI SRTPEVTCVV VDVSQEDPEV QFNWYVDGVE VHNAKTKPRE EQFNSTYRVV SVLTVLHQDW LNG KEYKCK VSNKGLPSSI EKTISKAKGQ PREPQVYTLP PSQEEMTKNQ VSLTCLVKGF YPSDIAVEWE SNGQPENNYK TTPP VLDSD GSFFLYSRLT VDKSRWQEGN VFSCSVMHEA LHNHYTQKSL SLSLGK

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Macromolecule #3: SP1-77 Fab light chain

MacromoleculeName: SP1-77 Fab light chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.294617 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DIQMTQSPSS LSASVGDRVT ITCQASQDIS DYLNWYQQQP GKAPKLLIYD ASNLETGVPS RFSGSGSGTD FTFTISSLQP EDIGTYYCQ QYDNLPTFGG GTKLEIKRTV AAPSVFIFPP SDEQLKSGTA SVVCLLNNFY PREAKVQWKV DNALQSGNSQ E SVTEQDSK ...String:
DIQMTQSPSS LSASVGDRVT ITCQASQDIS DYLNWYQQQP GKAPKLLIYD ASNLETGVPS RFSGSGSGTD FTFTISSLQP EDIGTYYCQ QYDNLPTFGG GTKLEIKRTV AAPSVFIFPP SDEQLKSGTA SVVCLLNNFY PREAKVQWKV DNALQSGNSQ E SVTEQDSK DSTYSLSSTL TLSKADYEKH KVYACEVTHQ GLSSPVTKSF NRGEC

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
0.15 mol/LNaClsodium chloride
0.025 mol/LTris-HClTris hydrochloride
0.02 %DDMn-dodecyl-D-maltopyranoside
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 54.91 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 7657522
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7krr

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 250319
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final 3D classificationSoftware - Name: cryoSPARC

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Atomic model buiding 1

Initial modelPDB ID:

7krr


Chain - Chain ID: A / Chain - Residue range: 14-1211 / Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementProtocol: AB INITIO MODEL
Output model

PDB-7upx:
Three RBD-down state of SARS-CoV-2 D614G spike in complex with the SP1-77 neutralizing antibody Fab fragment (local refinement of the RBD and Fab variable domains)

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