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- EMDB-24811: AAVrh.10:HL2383 -

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Basic information

Entry
Database: EMDB / ID: EMD-24811
TitleAAVrh.10:HL2383
Map data
Sample
  • Virus: Adeno-associated virus
    • Protein or peptide: AAVrh.10 Capsid in complex with HL2383
Function / homologyPhospholipase A2-like domain / Phospholipase A2-like domain / Parvovirus coat protein VP2 / Parvovirus coat protein VP1/VP2 / Parvovirus coat protein VP2 / Capsid/spike protein, ssDNA virus / T=1 icosahedral viral capsid / structural molecule activity / Capsid protein VP1
Function and homology information
Biological speciesAdeno-associated virus
Methodsingle particle reconstruction / cryo EM / Resolution: 7.1 Å
AuthorsMietzsch M / McKenna R
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: J Virol / Year: 2021
Title: Structural Study of Aavrh.10 Receptor and Antibody Interactions.
Authors: Mario Mietzsch / Jennifer C Yu / Jane Hsi / Paul Chipman / Felix Broecker / Zhang Fuming / Robert J Linhardt / Peter H Seeberger / Regine Heilbronn / Robert McKenna / Mavis Agbandje-McKenna /
Abstract: Recombinant adeno-associated virus (rAAV) vectors are one of the leading tools for the delivery of therapeutic genes in human gene therapy applications. For a successful transfer of their payload, ...Recombinant adeno-associated virus (rAAV) vectors are one of the leading tools for the delivery of therapeutic genes in human gene therapy applications. For a successful transfer of their payload, the AAV vectors have to circumvent potential preexisting neutralizing host antibodies and bind to the receptors of the target cells. Both of these aspects have not been structurally analyzed for AAVrh.10. Here, cryo-electron microscopy and three-dimensional image reconstruction were used to map the binding site of sulfated -acetyllactosamine (LacNAc; previously shown to bind AAVrh.10) and a series of four monoclonal antibodies (MAbs). LacNAc was found to bind to a pocket located on the side of the 3-fold capsid protrusion that is mostly conserved to AAV9 and equivalent to its galactose-binding site. As a result, AAVrh.10 was also shown to be able to bind to cell surface glycans with terminal galactose. For the antigenic characterization, it was observed that several anti-AAV8 MAbs cross-react with AAVrh.10. The binding sites of these antibodies were mapped to the 3-fold capsid protrusions. Based on these observations, the AAVrh.10 capsid surface was engineered to create variant capsids that escape these antibodies while maintaining infectivity. Gene therapy vectors based on adeno-associated virus rhesus isolate 10 (AAVrh.10) have been used in several clinical trials to treat monogenetic diseases. However, compared to other AAV serotypes little is known about receptor binding and antigenicity of the AAVrh.10 capsid. Particularly, preexisting neutralizing antibodies against capsids are an important challenge that can hamper treatment efficiency. This study addresses both topics and identifies critical regions of the AAVrh.10 capsid for receptor and antibody binding. The insights gained were utilized to generate AAVrh.10 variants capable of evading known neutralizing antibodies. The findings of this study could further aid the utilization of AAVrh.10 vectors in clinical trials and help the approval of the subsequent biologics.
History
DepositionSep 2, 2021-
Header (metadata) releaseSep 22, 2021-
Map releaseSep 22, 2021-
UpdateDec 1, 2021-
Current statusDec 1, 2021Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.75
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by radius
  • Surface level: 0.75
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_24811.png

Downloads & links

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Map

FileDownload / File: emd_24811.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.84 Å
Density
Contour LevelBy AUTHOR: 0.75 / Movie #1: 0.75
Minimum - Maximum-1.801049 - 9.130771
Average (Standard dev.)2.717015e-09 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderYXZ
Origin-140-140-140
Dimensions280280280
Spacing280280280
CellA=B=C: 515.2 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.841.841.84
M x/y/z280280280
origin x/y/z0.0000.0000.000
length x/y/z515.200515.200515.200
α/β/γ90.00090.00090.000
start NX/NY/NZ-140-140-140
NX/NY/NZ280280280
MAP C/R/S213
start NC/NR/NS-140-140-140
NC/NR/NS280280280
D min/max/mean-1.8019.1310.000

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Supplemental data

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Sample components

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Entire : Adeno-associated virus

EntireName: Adeno-associated virus
Components
  • Virus: Adeno-associated virus
    • Protein or peptide: AAVrh.10 Capsid in complex with HL2383

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Supramolecule #1: Adeno-associated virus

SupramoleculeName: Adeno-associated virus / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all / NCBI-ID: 272636 / Sci species name: Adeno-associated virus / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: No / Virus empty: No

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Macromolecule #1: AAVrh.10 Capsid in complex with HL2383

MacromoleculeName: AAVrh.10 Capsid in complex with HL2383 / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Adeno-associated virus
SequenceString: MAADGYLPDW LEDNLSEGIR EWWDLKPGAP KPKANQQKQD DGRGLVLPGY KYLGPFNGLD KGEPVNAADA AALEHDKAYD QQLKAGDNPY LRYNHADAEF QERLQEDTSF GGNLGRAVFQ AKKRVLEPLG LVEEGAKTAP GKKRPVEPSP QRSPDSSTGI GKKGQQPAKK ...String:
MAADGYLPDW LEDNLSEGIR EWWDLKPGAP KPKANQQKQD DGRGLVLPGY KYLGPFNGLD KGEPVNAADA AALEHDKAYD QQLKAGDNPY LRYNHADAEF QERLQEDTSF GGNLGRAVFQ AKKRVLEPLG LVEEGAKTAP GKKRPVEPSP QRSPDSSTGI GKKGQQPAKK RLNFGQTGDS ESVPDPQPIG EPPAGPSGLG SGTMAAGGGA PMADNNEGAD GVGSSSGNWH CDSTWLGDRV ITTSTRTWAL PTYNNHLYKQ ISNGTSGGST NDNTYFGYST PWGYFDFNRF HCHFSPRDWQ RLINNNWGFR PKRLNFKLFN IQVKEVTQNE GTKTIANNLT STIQVFTDSE YQLPYVLGSA HQGCLPPFPA DVFMIPQYGY LTLNNGSQAV GRSSFYCLEY FPSQMLRTGN NFEFSYQFED VPFHSSYAHS QSLDRLMNPL IDQYLYYLSR TQSTGGTAGT QQLLFSQAGP NNMSAQAKNW LPGPCYRQQR VSTTLSQNNN SNFAWTGATK YHLNGRDSLV NPGVAMATHK DDEERFFPSS GVLMFGKQGA GKDNVDYSSV MLTSEEEIKT TNPVATEQYG VVADNLQQQN AAPIVGAVNS QGALPGMVWQ NRDVYLQGPI WAKIPHTDGN FHPSPLMGGF GLKHPPPQIL IKNTPVPADP PTTFSQAKLA SFITQYSTGQ VSVEIEWELQ KENSKRWNPE IQYTSNYYKS TNVDFAVNTD GTYSEPRPIG TRYLTRNL

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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 TECNAI F20
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN ULTRASCAN 4000 (4k x 4k) / Average electron dose: 20.0 e/Å2
Experimental equipment
Model: Tecnai F20 / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: COMMON LINE
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionResolution.type: BY AUTHOR / Resolution: 7.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 6870

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