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- EMDB-55517: Structure of human HER2 in complex with EPS232 Fab -

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Basic information

Entry
Database: EMDB / ID: EMD-55517
TitleStructure of human HER2 in complex with EPS232 Fab
Map dataMain Post-processed map for HER2 in complex with EPS232 Fab
Sample
  • Complex: Human HER2 in complex with EPS232 Fab
    • Protein or peptide: Ig-like domain-containing protein
    • Protein or peptide: EPS232 Fab HC
    • Protein or peptide: Receptor tyrosine-protein kinase erbB-2
KeywordsAntibody Fab / Complex / cancer / extracellular domain. / ANTITUMOR PROTEIN
Function / homology
Function and homology information


negative regulation of immature T cell proliferation in thymus / ERBB3:ERBB2 complex / ERBB2-ERBB4 signaling pathway / GRB7 events in ERBB2 signaling / RNA polymerase I core binding / immature T cell proliferation in thymus / semaphorin receptor complex / ErbB-3 class receptor binding / motor neuron axon guidance / Sema4D induced cell migration and growth-cone collapse ...negative regulation of immature T cell proliferation in thymus / ERBB3:ERBB2 complex / ERBB2-ERBB4 signaling pathway / GRB7 events in ERBB2 signaling / RNA polymerase I core binding / immature T cell proliferation in thymus / semaphorin receptor complex / ErbB-3 class receptor binding / motor neuron axon guidance / Sema4D induced cell migration and growth-cone collapse / regulation of microtubule-based process / PLCG1 events in ERBB2 signaling / enzyme-linked receptor protein signaling pathway / ERBB2 Activates PTK6 Signaling / ERBB2-EGFR signaling pathway / neurotransmitter receptor localization to postsynaptic specialization membrane / ERBB2-ERBB3 signaling pathway / Drug-mediated inhibition of ERBB2 signaling / Resistance of ERBB2 KD mutants to trastuzumab / Resistance of ERBB2 KD mutants to sapitinib / Resistance of ERBB2 KD mutants to tesevatinib / Resistance of ERBB2 KD mutants to neratinib / Resistance of ERBB2 KD mutants to osimertinib / Resistance of ERBB2 KD mutants to afatinib / Resistance of ERBB2 KD mutants to AEE788 / Resistance of ERBB2 KD mutants to lapatinib / Drug resistance in ERBB2 TMD/JMD mutants / neuromuscular junction development / positive regulation of Rho protein signal transduction / positive regulation of MAP kinase activity / positive regulation of transcription by RNA polymerase I / ERBB2 Regulates Cell Motility / oligodendrocyte differentiation / semaphorin-plexin signaling pathway / PI3K events in ERBB2 signaling / regulation of angiogenesis / positive regulation of protein targeting to membrane / Schwann cell development / regulation of ERK1 and ERK2 cascade / coreceptor activity / Signaling by ERBB2 / TFAP2 (AP-2) family regulates transcription of growth factors and their receptors / myelination / transmembrane receptor protein tyrosine kinase activity / positive regulation of cell adhesion / GRB2 events in ERBB2 signaling / SHC1 events in ERBB2 signaling / peptidyl-tyrosine phosphorylation / cell surface receptor protein tyrosine kinase signaling pathway / Constitutive Signaling by Overexpressed ERBB2 / Downregulation of ERBB2:ERBB3 signaling / cellular response to epidermal growth factor stimulus / basal plasma membrane / positive regulation of epithelial cell proliferation / positive regulation of translation / neuromuscular junction / phosphatidylinositol 3-kinase/protein kinase B signal transduction / wound healing / Signaling by ERBB2 TMD/JMD mutants / receptor protein-tyrosine kinase / Signaling by ERBB2 ECD mutants / Signaling by ERBB2 KD Mutants / receptor tyrosine kinase binding / cellular response to growth factor stimulus / epidermal growth factor receptor signaling pathway / Downregulation of ERBB2 signaling / ruffle membrane / neuron differentiation / Constitutive Signaling by Aberrant PI3K in Cancer / transmembrane signaling receptor activity / PIP3 activates AKT signaling / myelin sheath / heart development / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / RAF/MAP kinase cascade / positive regulation of cell growth / presynaptic membrane / protein tyrosine kinase activity / basolateral plasma membrane / early endosome / protein phosphorylation / cell surface receptor signaling pathway / signaling receptor complex / positive regulation of MAPK cascade / cell population proliferation / endosome membrane / apical plasma membrane / intracellular signal transduction / protein heterodimerization activity / signaling receptor binding / negative regulation of apoptotic process / perinuclear region of cytoplasm / signal transduction / nucleoplasm / ATP binding / membrane / identical protein binding / nucleus / plasma membrane / cytosol
Similarity search - Function
: / Epidermal growth factor receptor transmembrane-juxtamembrane segment / Tyrosine protein kinase, EGF/ERB/XmrK receptor / Growth factor receptor domain 4 / Growth factor receptor domain IV / Receptor L-domain / Furin-like cysteine-rich domain / Receptor L-domain superfamily / Furin-like cysteine rich region / Receptor L domain ...: / Epidermal growth factor receptor transmembrane-juxtamembrane segment / Tyrosine protein kinase, EGF/ERB/XmrK receptor / Growth factor receptor domain 4 / Growth factor receptor domain IV / Receptor L-domain / Furin-like cysteine-rich domain / Receptor L-domain superfamily / Furin-like cysteine rich region / Receptor L domain / Furin-like repeat / Furin-like repeats / Growth factor receptor cysteine-rich domain superfamily / : / Tyrosine-protein kinase, catalytic domain / Tyrosine kinase, catalytic domain / Tyrosine protein kinases specific active-site signature. / Tyrosine-protein kinase, active site / Serine-threonine/tyrosine-protein kinase, catalytic domain / Protein tyrosine and serine/threonine kinase / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Receptor tyrosine-protein kinase erbB-2
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsBirtley J / Johnson RM / Regan L / Soni K / Pye VE / Fitzgerald K
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Not funded United Kingdom
CitationJournal: To Be Published
Title: Elucidating the relationship between affinity and potency in the performance of IgE as therapeutic antibodies for cancers with low antigen densities
Authors: Birtley J / Johnson RM / Regan L / Soni K / Pye VE / Fitzgerald K
History
DepositionOct 29, 2025-
Header (metadata) releaseMar 11, 2026-
Map releaseMar 11, 2026-
UpdateMar 11, 2026-
Current statusMar 11, 2026Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_55517.png

Downloads & links

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Map

FileDownload / File: emd_55517.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMain Post-processed map for HER2 in complex with EPS232 Fab
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.73 Å/pix.
x 384 pix.
= 279.936 Å		0.73 Å/pix.
x 384 pix.
= 279.936 Å		0.73 Å/pix.
x 384 pix.
= 279.936 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.729 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0067
Minimum - Maximum-0.025741586 - 0.03504571
Average (Standard dev.)0.000022038485 (±0.00052211864)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 279.93597 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_55517_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Unsharpened refine3D map for HER2 in complex with EPS232 Fab

Fileemd_55517_additional_1.map
AnnotationUnsharpened refine3D map for HER2 in complex with EPS232 Fab
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 1 for HER2 in complex with EPS232 Fab

Fileemd_55517_half_map_1.map
AnnotationHalf map 1 for HER2 in complex with EPS232 Fab
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 2 for HER2 in complex with EPS232 Fab

Fileemd_55517_half_map_2.map
AnnotationHalf map 2 for HER2 in complex with EPS232 Fab
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Human HER2 in complex with EPS232 Fab

EntireName: Human HER2 in complex with EPS232 Fab
Components
  • Complex: Human HER2 in complex with EPS232 Fab
    • Protein or peptide: Ig-like domain-containing protein
    • Protein or peptide: EPS232 Fab HC
    • Protein or peptide: Receptor tyrosine-protein kinase erbB-2

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Supramolecule #1: Human HER2 in complex with EPS232 Fab

SupramoleculeName: Human HER2 in complex with EPS232 Fab / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Ig-like domain-containing protein

MacromoleculeName: Ig-like domain-containing protein / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 22.67699 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QSVLTQPASV SGSPGQSITI SCTGTSSDVG SYNLVSWYQQ HPGKAPKLMI YTVSNRPSGV SNRFSGSKSG NTASLTISGL QAEDEADYY CSSYTSSSSL VFGGGTKLTV LGQPKAAPSV TLFPPSSEEL QANKATLVCL ISDFYPGAVT VAWKADSSPV K AGVETTTP ...String:
QSVLTQPASV SGSPGQSITI SCTGTSSDVG SYNLVSWYQQ HPGKAPKLMI YTVSNRPSGV SNRFSGSKSG NTASLTISGL QAEDEADYY CSSYTSSSSL VFGGGTKLTV LGQPKAAPSV TLFPPSSEEL QANKATLVCL ISDFYPGAVT VAWKADSSPV K AGVETTTP SKQSNNKYAA SSYLSLTPEQ WKSHRSYSCQ VTHEGSTVEK TVAPTECS

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Macromolecule #2: EPS232 Fab HC

MacromoleculeName: EPS232 Fab HC / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.701863 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QVQLVQSGAE VKKPGASVKV SCKASGYTFT SYAMHWVRQA PGQRLEWIGW INAGNGNTKY SQKFQGRVTI TRDTSASTAY MELSSLRSE DTAVYYCARD FSSQVATAAV DYWGQGTLVT VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV T VSWNSGAL ...String:
QVQLVQSGAE VKKPGASVKV SCKASGYTFT SYAMHWVRQA PGQRLEWIGW INAGNGNTKY SQKFQGRVTI TRDTSASTAY MELSSLRSE DTAVYYCARD FSSQVATAAV DYWGQGTLVT VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV T VSWNSGAL TSGVHTFPAV LQSSGLYSLS SVTVPSSSLG TQTYICNVNH KPSNTKVDKK VEPKSCDKTS GQAGQHHHHH HG AEQKLIS EEDLGGLNDI FEAQKIEWHE

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Macromolecule #3: Receptor tyrosine-protein kinase erbB-2

MacromoleculeName: Receptor tyrosine-protein kinase erbB-2 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: receptor protein-tyrosine kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 70.249711 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: TQVCTGTDMK LRLPASPETH LDMLRHLYQG CQVVQGNLEL TYLPTNASLS FLQDIQEVQG YVLIAHNQVR QVPLQRLRIV RGTQLFEDN YALAVLDNGD PLNNTTPVTG ASPGGLRELQ LRSLTEILKG GVLIQRNPQL CYQDTILWKD IFHKNNQLAL T LIDTNRSR ...String:
TQVCTGTDMK LRLPASPETH LDMLRHLYQG CQVVQGNLEL TYLPTNASLS FLQDIQEVQG YVLIAHNQVR QVPLQRLRIV RGTQLFEDN YALAVLDNGD PLNNTTPVTG ASPGGLRELQ LRSLTEILKG GVLIQRNPQL CYQDTILWKD IFHKNNQLAL T LIDTNRSR ACHPCSPMCK GSRCWGESSE DCQSLTRTVC AGGCARCKGP LPTDCCHEQC AAGCTGPKHS DCLACLHFNH SG ICELHCP ALVTYNTDTF ESMPNPEGRY TFGASCVTAC PYNYLSTDVG SCTLVCPLHN QEVTAEDGTQ RCEKCSKPCA RVC YGLGME HLREVRAVTS ANIQEFAGCK KIFGSLAFLP ESFDGDPASN TAPLQPEQLQ VFETLEEITG YLYISAWPDS LPDL SVFQN LQVIRGRILH NGAYSLTLQG LGISWLGLRS LRELGSGLAL IHHNTHLCFV HTVPWDQLFR NPHQALLHTA NRPED ECVG EGLACHQLCA RGHCWGPGPT QCVNCSQFLR GQECVEECRV LQGLPREYVN ARHCLPCHPE CQPQNGSVTC FGPEAD QCV ACAHYKDPPF CVARCPSGVK PDLSYMPIWK FPDEEGACQP CPINCTHSCV DLDDKGCPAE QRASPLTHHH HHH

UniProtKB: Receptor tyrosine-protein kinase erbB-2

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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

Concentration0.1 mg/mL
BufferpH: 7.4
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Details: 25 mAU
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: TFS Selectris X / Energy filter - Slit width: 10 eV
Image recordingFilm or detector model: TFS FALCON 4i (4k x 4k) / Number grids imaged: 1 / Number real images: 10400 / Average exposure time: 4.39 sec. / Average electron dose: 49.32 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1662836
CTF correctionSoftware - Name: Warp (ver. 1.0.9) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 5.0) / Number images used: 179482
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 5.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 5.0)
Final 3D classificationSoftware - Name: RELION (ver. 5.0)
FSC plot (resolution estimation)

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