6QNU image
Deposition Date 2019-02-12
Release Date 2019-03-27
Last Version Date 2024-05-15
Entry Detail
PDB ID:
6QNU
Keywords:
VIRAL PROTEIN
Title:
Human Adenovirus type 3 fiber knob in complex with two copies of Desmoglein-2
Biological Source:
Source Organism:
Human adenovirus B serotype 3 (Taxon ID: 45659)
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.80 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
6QNU validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Fiber protein
Gene (Uniprot):L5
Chain IDs:A, B, C
Chain Length:189
Number of Molecules:3
Biological Source:Human adenovirus B serotype 3
UniProt ID:P04501 Pfam ID:PF00541
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Desmoglein-2
Gene (Uniprot):DSG2
Chain IDs:D, E
Chain Length:224
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q14126 Pfam ID:PF00028
Ligand Molecules
NA
Primary Citation
CryoEM structure of adenovirus type 3 fibre with desmoglein 2 shows an unusual mode of receptor engagement.
Nat Commun 10 1181 1181 (2019)
PMID: 30862836 DOI: 10.1038/s41467-019-09220-y

Abstact

Attachment of human adenovirus (HAd) to the host cell is a critical step of infection. Initial attachment occurs via the adenoviral fibre knob protein and a cellular receptor. Here we report the cryo-electron microscopy (cryo-EM) structure of a <100 kDa non-symmetrical complex comprising the trimeric HAd type 3 fibre knob (HAd3K) and human desmoglein 2 (DSG2). The structure reveals a unique stoichiometry of 1:1 and 2:1 (DSG2: knob trimer) not previously observed for other HAd-receptor complexes. We demonstrate that mutating Asp261 in the fibre knob is sufficient to totally abolish receptor binding. These data shed new light on adenovirus infection strategies and provide insights for adenoviral vector development and structure-based design.

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Primary Citation of related structures
6QNT