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Basic information

Entry
Database: PDB / ID: 9cls
TitleCryo-EM model derived from localized reconstruction of human adenovirus 6 (Ad6)-hexon-FII complex
Components
  • Hexon protein
  • Prothrombin
KeywordsVIRAL PROTEIN / Adenovirus / Hexon / Coagulation factor X / Coagulation factor II / Prothrombin / Complex / Interactions / VIRUS
Function / homology
Function and homology information


T=25 icosahedral viral capsid / microtubule-dependent intracellular transport of viral material towards nucleus / cytolysis by host of symbiont cells / positive regulation of phospholipase C-activating G protein-coupled receptor signaling pathway / thrombospondin receptor activity / Defective factor XII causes hereditary angioedema / thrombin-activated receptor signaling pathway / thrombin / neutrophil-mediated killing of gram-negative bacterium / regulation of blood coagulation ...T=25 icosahedral viral capsid / microtubule-dependent intracellular transport of viral material towards nucleus / cytolysis by host of symbiont cells / positive regulation of phospholipase C-activating G protein-coupled receptor signaling pathway / thrombospondin receptor activity / Defective factor XII causes hereditary angioedema / thrombin-activated receptor signaling pathway / thrombin / neutrophil-mediated killing of gram-negative bacterium / regulation of blood coagulation / Defective F8 cleavage by thrombin / ligand-gated ion channel signaling pathway / Platelet Aggregation (Plug Formation) / negative regulation of astrocyte differentiation / positive regulation of collagen biosynthetic process / negative regulation of platelet activation / negative regulation of blood coagulation / positive regulation of blood coagulation / negative regulation of fibrinolysis / regulation of cytosolic calcium ion concentration / Transport of gamma-carboxylated protein precursors from the endoplasmic reticulum to the Golgi apparatus / Gamma-carboxylation of protein precursors / Common Pathway of Fibrin Clot Formation / Removal of aminoterminal propeptides from gamma-carboxylated proteins / fibrinolysis / negative regulation of proteolysis / Intrinsic Pathway of Fibrin Clot Formation / negative regulation of cytokine production involved in inflammatory response / positive regulation of release of sequestered calcium ion into cytosol / Peptide ligand-binding receptors / Regulation of Complement cascade / acute-phase response / positive regulation of receptor signaling pathway via JAK-STAT / Cell surface interactions at the vascular wall / lipopolysaccharide binding / growth factor activity / positive regulation of insulin secretion / platelet activation / positive regulation of protein localization to nucleus / response to wounding / Golgi lumen / antimicrobial humoral immune response mediated by antimicrobial peptide / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / positive regulation of reactive oxygen species metabolic process / blood coagulation / heparin binding / regulation of cell shape / Thrombin signalling through proteinase activated receptors (PARs) / host cell / positive regulation of protein phosphorylation / positive regulation of cell growth / : / G alpha (q) signalling events / blood microparticle / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / cell surface receptor signaling pathway / receptor ligand activity / endoplasmic reticulum lumen / symbiont entry into host cell / signaling receptor binding / serine-type endopeptidase activity / positive regulation of cell population proliferation / calcium ion binding / host cell nucleus / structural molecule activity / proteolysis / extracellular space / extracellular exosome / extracellular region / plasma membrane
Similarity search - Function
Adenovirus hexon protein / Adenovirus Pll, hexon, N-terminal / Adenovirus Pll, hexon, C-terminal / Adenovirus Pll, hexon, subdomain 2 / Hexon, adenovirus major coat protein, N-terminal domain / Hexon, adenovirus major coat protein, C-terminal domain / Group II dsDNA virus coat/capsid protein / Prothrombin/thrombin / Thrombin light chain / Thrombin light chain domain superfamily ...Adenovirus hexon protein / Adenovirus Pll, hexon, N-terminal / Adenovirus Pll, hexon, C-terminal / Adenovirus Pll, hexon, subdomain 2 / Hexon, adenovirus major coat protein, N-terminal domain / Hexon, adenovirus major coat protein, C-terminal domain / Group II dsDNA virus coat/capsid protein / Prothrombin/thrombin / Thrombin light chain / Thrombin light chain domain superfamily / : / Thrombin light chain / Kringle domain / Kringle / Kringle, conserved site / Kringle superfamily / Kringle domain signature. / Kringle domain profile. / Kringle domain / Vitamin K-dependent carboxylation/gamma-carboxyglutamic (GLA) domain / Gamma-carboxyglutamic acid-rich (GLA) domain / Gamma-carboxyglutamic acid-rich (GLA) domain superfamily / Vitamin K-dependent carboxylation domain. / Gla domain profile. / Domain containing Gla (gamma-carboxyglutamate) residues. / Kringle-like fold / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Serine proteases, trypsin family, histidine active site. / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, serine active site. / Serine proteases, trypsin domain profile. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan
Similarity search - Domain/homology
Hexon protein / Prothrombin
Similarity search - Component
Biological speciesHuman adenovirus 6
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å
AuthorsReddy, V.S. / Ma, O.X.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI161367 United States
CitationJournal: Nat Commun / Year: 2024
Title: Structure-derived insights from blood factors binding to the surfaces of different adenoviruses.
Authors: Haley E Mudrick / Shao-Chia Lu / Janarjan Bhandari / Mary E Barry / Jack R Hemsath / Felix G M Andres / Olivia X Ma / Michael A Barry / Vijay S Reddy /
Abstract: The tropism of adenoviruses (Ads) is significantly influenced by the binding of various blood factors. To investigate differences in their binding, we conducted cryo-EM analysis on complexes of ...The tropism of adenoviruses (Ads) is significantly influenced by the binding of various blood factors. To investigate differences in their binding, we conducted cryo-EM analysis on complexes of several human adenoviruses with human platelet factor-4 (PF4), coagulation factors FII (Prothrombin), and FX. While we observed EM densities for FII and FX bound to all the species-C adenoviruses examined, no densities were seen for PF4, even though PF4 can co-pellet with various Ads. Similar to FX, the γ-carboxyglutamic acid (Gla) domain of FII binds within the surface cavity of hexon trimers. While FII binds equally to species-C Ads: Ad5, Ad6, and Ad657, FX exhibits significantly better binding to Ad5 and Ad657 compared to Ad6. Although only the FX-Gla domain is observed at high-resolution (3.7 Å), the entire FX is visible at low-resolution bound to Ad5 in three equivalent binding modes consistent with the 3-fold symmetric hexon. Only the Gla and kringle-1 domains of FII are visible on all the species-C adenoviruses, where the rigid FII binds in an upright fashion, in contrast to the flexible and bent FX. These data suggest that differential binding of FII and FX may shield certain species-C adenoviruses differently against immune molecules, thereby modulating their tropism.
History
DepositionJul 12, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 27, 2024Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
J: Hexon protein
K: Hexon protein
L: Hexon protein
Z: Prothrombin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)396,74911
Polymers396,4684
Non-polymers2817
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Hexon protein / CP-H / Protein II


Mass: 108635.133 Da / Num. of mol.: 3 / Source method: isolated from a natural source / Source: (natural) Human adenovirus 6 / References: UniProt: B2ZWX4
#2: Protein Prothrombin / Coagulation factor II


Mass: 70562.930 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P00734, thrombin
#3: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationY

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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

Component
IDNameTypeDetailsEntity IDParent-IDSource
1Human adenovirus 6 (Ad6) in complex with Coagulation factor FIICOMPLEXCryo-EM model derived from localized reconstruction#1-#20NATURAL
2Hexon proteinCOMPLEX#11NATURAL
3Human Coagulation Factor IIORGANELLE OR CELLULAR COMPONENT#22NATURAL
Molecular weight
IDEntity assembly-IDValue (°)Experimental value
11500 kDa/nmNO
21500 kDa/nmNO
3170 kDa/nmNO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Human adenovirus 610534
32Human adenovirus 610534
43homo sapiens (human)9606
Details of virus
IDEntity assembly-IDEmptyEnvelopedIsolateType
11NONOSPECIESVIRION
22
33
Natural hostOrganism: Human adenovirus 5
Virus shell
IDEntity assembly-IDTriangulation number (T number)
1125
22
33
Buffer solutionpH: 7.2
Buffer componentConc.: 20 mM / Name: Hepes
SpecimenConc.: 2 mg/ml / Embedding 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 FIELD / Nominal magnification: 81000 X / Calibrated magnification: 81000 X / Nominal defocus max: 4000 nm / Nominal defocus min: 2500 nm / Calibrated defocus min: 1000 nm / Calibrated defocus max: 5000 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 81 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k) / Num. of grids imaged: 3 / Num. of real images: 10000

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Processing

EM software
IDNameVersionCategory
1RELION4particle selection
2EPUimage acquisition
4CTFFIND4CTF correction
7Coot0.9.8model fitting
9PHENIXmodel refinement
10RELION4initial Euler assignment
11RELION4final Euler assignment
12RELION4classification
CTF correctionType: NONE
Particle selectionNum. of particles selected: 59000
3D reconstructionResolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 13045 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT
Atomic model buildingPDB-ID: 6B1T

6b1t


Accession code: 6B1T / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00527525
ELECTRON MICROSCOPYf_angle_d0.56137429
ELECTRON MICROSCOPYf_dihedral_angle_d15.16910055
ELECTRON MICROSCOPYf_chiral_restr0.0443969
ELECTRON MICROSCOPYf_plane_restr0.0044949

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