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- EMDB-38620: SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2 -

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Basic information

Entry
Database: EMDB / ID: EMD-38620
TitleSARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2
Map data
Sample
  • Complex: Cryo-EM structure of SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2
    • Protein or peptide: Angiotensin-converting enzyme 2
    • Protein or peptide: Spike protein S1
    • Protein or peptide: IMCAS-316 H chain
    • Protein or peptide: IMCAS-316 L chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: ZINC ION
KeywordsSARS-CoV-2 / broadly neutralizing antibodies / VIRAL PROTEIN/HYDROLASE/IMMUNE SYSTEM / VIRAL PROTEIN-HYDROLASE-IMMUNE SYSTEM complex
Function / homology
Function and homology information


positive regulation of amino acid transport / angiotensin-converting enzyme 2 / positive regulation of L-proline import across plasma membrane / Hydrolases; Acting on peptide bonds (peptidases); Metallocarboxypeptidases / angiotensin-mediated drinking behavior / positive regulation of gap junction assembly / regulation of systemic arterial blood pressure by renin-angiotensin / tryptophan transport / regulation of cardiac conduction / maternal process involved in female pregnancy ...positive regulation of amino acid transport / angiotensin-converting enzyme 2 / positive regulation of L-proline import across plasma membrane / Hydrolases; Acting on peptide bonds (peptidases); Metallocarboxypeptidases / angiotensin-mediated drinking behavior / positive regulation of gap junction assembly / regulation of systemic arterial blood pressure by renin-angiotensin / tryptophan transport / regulation of cardiac conduction / maternal process involved in female pregnancy / peptidyl-dipeptidase activity / regulation of vasoconstriction / transporter activator activity / Metabolism of Angiotensinogen to Angiotensins / carboxypeptidase activity / angiotensin maturation / viral life cycle / Attachment and Entry / receptor-mediated endocytosis of virus by host cell / metallocarboxypeptidase activity / positive regulation of cardiac muscle contraction / regulation of cytokine production / blood vessel diameter maintenance / negative regulation of smooth muscle cell proliferation / brush border membrane / negative regulation of ERK1 and ERK2 cascade / positive regulation of reactive oxygen species metabolic process / metallopeptidase activity / endocytic vesicle membrane / regulation of cell population proliferation / virus receptor activity / regulation of inflammatory response / endopeptidase activity / symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / viral translation / symbiont-mediated-mediated suppression of host tetherin activity / Potential therapeutics for SARS / Induction of Cell-Cell Fusion / structural constituent of virion / membrane fusion / entry receptor-mediated virion attachment to host cell / Attachment and Entry / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / cilium / symbiont-mediated suppression of host innate immune response / apical plasma membrane / receptor ligand activity / membrane raft / endocytosis involved in viral entry into host cell / endoplasmic reticulum lumen / 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 / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / cell surface / negative regulation of transcription by RNA polymerase II / extracellular space / extracellular exosome / extracellular region / zinc ion binding / identical protein binding / membrane / plasma membrane
Similarity search - Function
Collectrin domain / Renal amino acid transporter / Collectrin-like domain profile. / Peptidase M2, peptidyl-dipeptidase A / Angiotensin-converting enzyme / Peptidase family M2 domain profile. / Neutral zinc metallopeptidases, zinc-binding region signature. / 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 ...Collectrin domain / Renal amino acid transporter / Collectrin-like domain profile. / Peptidase M2, peptidyl-dipeptidase A / Angiotensin-converting enzyme / Peptidase family M2 domain profile. / Neutral zinc metallopeptidases, zinc-binding region signature. / 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, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / 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 / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2 superfamily, coronavirus / 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, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Spike glycoprotein / Angiotensin-converting enzyme 2
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2 / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.61 Å
AuthorsTong Z / Cui Y / Xie Y / Tong J / Gao GF / Qi J
Funding support China, 1 items
OrganizationGrant numberCountry
Chinese Academy of SciencesXDB29010202 China
CitationJournal: Cell Rep / Year: 2024
Title: Deciphering a reliable synergistic bispecific strategy of rescuing antibodies for SARS-CoV-2 escape variants, including BA.2.86, EG.5.1, and JN.1.
Authors: Zhou Tong / Jianyu Tong / Wenwen Lei / Yufeng Xie / Yingzi Cui / Guowen Jia / Shihua Li / Zezhong Zhang / Zhimin Cheng / Xiao Xing / Haiyun Ma / Lan Deng / Rong Zhang / Xin Zhao / Kefang Liu ...Authors: Zhou Tong / Jianyu Tong / Wenwen Lei / Yufeng Xie / Yingzi Cui / Guowen Jia / Shihua Li / Zezhong Zhang / Zhimin Cheng / Xiao Xing / Haiyun Ma / Lan Deng / Rong Zhang / Xin Zhao / Kefang Liu / Qihui Wang / Jianxun Qi / Haomin Huang / Rui Song / Zhaoming Su / Guizhen Wu / Jing Lou / George Fu Gao /
Abstract: The game between therapeutic monoclonal antibodies (mAbs) and continuously emerging severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants has favored the virus, as most therapeutic ...The game between therapeutic monoclonal antibodies (mAbs) and continuously emerging severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants has favored the virus, as most therapeutic mAbs have been evaded. Addressing this challenge, we systematically explored a reproducible bispecific antibody (bsAb)-dependent synergistic effect in this study. It could effectively restore the neutralizing activity of the bsAb when any of its single mAbs is escaped by variants. This synergy is primarily attributed to the binding angle of receptor-binding domain (RBD)-5, facilitating inter-spike cross-linking and promoting cryptic epitope exposure that classical antibody cocktails cannot achieve. Furthermore, RBD-5 with RBD-2, RBD-6, and RBD-7, alongside RBD-8, also exhibit significantly enhanced effects. This study not only shifts the paradigm in understanding antibody interactions but paves the way for developing more effective therapeutic antibodies against rapidly mutating SARS-CoV-2, with Dia-19 already showing promise against emerging variants like BA.2.86, EG.5.1, and JN.1.
History
DepositionJan 9, 2024-
Header (metadata) releaseJul 17, 2024-
Map releaseJul 17, 2024-
UpdateJul 23, 2025-
Current statusJul 23, 2025Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_38620.png

Downloads & links

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Map

FileDownload / File: emd_38620.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.85 Å/pix.
x 360 pix.
= 306. Å		0.85 Å/pix.
x 360 pix.
= 306. Å		0.85 Å/pix.
x 360 pix.
= 306. Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.85 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.18
Minimum - Maximum-0.0017169801 - 1.8936121
Average (Standard dev.)0.0007388615 (±0.01969098)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 306.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_38620_half_map_1.map
Projections & Slices
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Histogram (log scale)

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Half map: #2

Fileemd_38620_half_map_2.map
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Sample components

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Entire : Cryo-EM structure of SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2

EntireName: Cryo-EM structure of SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2
Components
  • Complex: Cryo-EM structure of SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2
    • Protein or peptide: Angiotensin-converting enzyme 2
    • Protein or peptide: Spike protein S1
    • Protein or peptide: IMCAS-316 H chain
    • Protein or peptide: IMCAS-316 L chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: ZINC ION

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Supramolecule #1: Cryo-EM structure of SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2

SupramoleculeName: Cryo-EM structure of SARS-CoV-2 Omicron BA.4 RBD + IMCAS-316 + ACE2
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Macromolecule #1: Angiotensin-converting enzyme 2

MacromoleculeName: Angiotensin-converting enzyme 2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: angiotensin-converting enzyme 2
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 92.556695 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MSSSSWLLLS LVAVTAAQST IEEQAKTFLD KFNHEAEDLF YQSSLASWNY NTNITEENVQ NMNNAGDKWS AFLKEQSTLA QMYPLQEIQ NLTVKLQLQA LQQNGSSVLS EDKSKRLNTI LNTMSTIYST GKVCNPDNPQ ECLLLEPGLN EIMANSLDYN E RLWAWESW ...String:
MSSSSWLLLS LVAVTAAQST IEEQAKTFLD KFNHEAEDLF YQSSLASWNY NTNITEENVQ NMNNAGDKWS AFLKEQSTLA QMYPLQEIQ NLTVKLQLQA LQQNGSSVLS EDKSKRLNTI LNTMSTIYST GKVCNPDNPQ ECLLLEPGLN EIMANSLDYN E RLWAWESW RSEVGKQLRP LYEEYVVLKN EMARANHYED YGDYWRGDYE VNGVDGYDYS RGQLIEDVEH TFEEIKPLYE HL HAYVRAK LMNAYPSYIS PIGCLPAHLL GDMWGRFWTN LYSLTVPFGQ KPNIDVTDAM VDQAWDAQRI FKEAEKFFVS VGL PNMTQG FWENSMLTDP GNVQKAVCHP TAWDLGKGDF RILMCTKVTM DDFLTAHHEM GHIQYDMAYA AQPFLLRNGA NEGF HEAVG EIMSLSAATP KHLKSIGLLS PDFQEDNETE INFLLKQALT IVGTLPFTYM LEKWRWMVFK GEIPKDQWMK KWWEM KREI VGVVEPVPHD ETYCDPASLF HVSNDYSFIR YYTRTLYQFQ FQEALCQAAK HEGPLHKCDI SNSTEAGQKL FNMLRL GKS EPWTLALENV VGAKNMNVRP LLNYFEPLFT WLKDQNKNSF VGWSTDWSPY ADQSIKVRIS LKSALGDKAY EWNDNEM YL FRSSVAYAMR QYFLKVKNQM ILFGEEDVRV ANLKPRISFN FFVTAPKNVS DIIPRTEVEK AIRMSRSRIN DAFRLNDN S LEFLGIQPTL GPPNQPPVSI WLIVFGVVMG VIVVGIVILI FTGIRDRKKK NKARSGENPY ASIDISKGEN NPGFQNTDD VQTSF

UniProtKB: Angiotensin-converting enzyme 2

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Macromolecule #2: Spike protein S1

MacromoleculeName: Spike protein S1 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2 / Strain: Omicron/BA.4
Molecular weightTheoretical: 25.255643 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: RVQPTESIVR FPNITNLCPF DEVFNATRFA SVYAWNRKRI SNCVADYSVL YNFAPFFAFK CYGVSPTKLN DLCFTNVYAD SFVIRGNEV SQIAPGQTGN IADYNYKLPD DFTGCVIAWN SNKLDSKVGG NYNYRYRLFR KSNLKPFERD ISTEIYQAGN K PCNGVAGV ...String:
RVQPTESIVR FPNITNLCPF DEVFNATRFA SVYAWNRKRI SNCVADYSVL YNFAPFFAFK CYGVSPTKLN DLCFTNVYAD SFVIRGNEV SQIAPGQTGN IADYNYKLPD DFTGCVIAWN SNKLDSKVGG NYNYRYRLFR KSNLKPFERD ISTEIYQAGN K PCNGVAGV NCYFPLQSYG FRPTYGVGHQ PYRVVVLSFE LLHAPATVCG PKKSTNLVKN KCVNF

UniProtKB: Spike glycoprotein

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Macromolecule #3: IMCAS-316 H chain

MacromoleculeName: IMCAS-316 H chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 24.482391 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QVQLVESGGG VVQPGRSLRL SCAASGFTFS NYGMHWVRQA PGKGLEWVAV ISHDASNKYY ADSVKGRFTI SRDNSKNTQY LQMNSLRAE DTAVYYCAKG GGYSYVVDMG PYWGQGTLVT VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV T VSWNSGAL ...String:
QVQLVESGGG VVQPGRSLRL SCAASGFTFS NYGMHWVRQA PGKGLEWVAV ISHDASNKYY ADSVKGRFTI SRDNSKNTQY LQMNSLRAE DTAVYYCAKG GGYSYVVDMG PYWGQGTLVT VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV T VSWNSGAL TSGVHTFPAV LQSSGLYSLS SVVTVPSSSL GTQTYICNVN HKPSNTKVDK RVEPKSCDKT HT

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Macromolecule #4: IMCAS-316 L chain

MacromoleculeName: IMCAS-316 L chain / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.309699 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DIQMTQSPSS LSASVGDRVT ITCRASQSIS NYLNWYQQKP GKAPKLLIYD ASNLETGVPS RFSGSGSGAD FTFTIGSLQP EDSATYYCQ QYDNLPLTFG GGTKVEIKGT VAAPSVFIFP PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS Q ESVTEQDS ...String:
DIQMTQSPSS LSASVGDRVT ITCRASQSIS NYLNWYQQKP GKAPKLLIYD ASNLETGVPS RFSGSGSGAD FTFTIGSLQP EDSATYYCQ QYDNLPLTFG GGTKVEIKGT VAAPSVFIFP PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS Q ESVTEQDS KDSTYSLSST LTLSKADYEK HKVYACEVTH QGLSSPVTKS FNRGECS

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Macromolecule #6: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 6 / Number of copies: 6 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #7: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 7 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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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

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6lzg

Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.61 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 583004
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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