4QZV image
Deposition Date 2014-07-29
Release Date 2014-10-29
Last Version Date 2024-11-20
Entry Detail
PDB ID:
4QZV
Title:
Bat-derived coronavirus HKU4 uses MERS-CoV receptor human CD26 for cell entry
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.59 Å
R-Value Free:
0.22
R-Value Work:
0.18
R-Value Observed:
0.19
Space Group:
P 2 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Dipeptidyl peptidase 4
Gene (Uniprot):DPP4
Chain IDs:A, C
Chain Length:734
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Molecule:Spike protein S1
Gene (Uniprot):S
Chain IDs:B, D
Chain Length:246
Number of Molecules:2
Biological Source:Tylonycteris bat coronavirus HKU4
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN C ASN GLYCOSYLATION SITE
Ligand Molecules
Primary Citation
Bat Origins of MERS-CoV Supported by Bat Coronavirus HKU4 Usage of Human Receptor CD26.
Cell Host Microbe 16 328 337 (2014)
PMID: 25211075 DOI: 10.1016/j.chom.2014.08.009

Abstact

The recently reported Middle East respiratory syndrome coronavirus (MERS-CoV) is phylogenetically closely related to the bat coronaviruses (BatCoVs) HKU4 and HKU5. However, the evolutionary pathway of MERS-CoV is still unclear. A receptor binding domain (RBD) in the MERS-CoV envelope-embedded spike protein specifically engages human CD26 (hCD26) to initiate viral entry. The high sequence identity in the viral spike protein prompted us to investigate if HKU4 and HKU5 can recognize hCD26 for cell entry. We found that HKU4-RBD, but not HKU5-RBD, binds to hCD26, and pseudotyped viruses embedding HKU4 spike can infect cells via hCD26 recognition. The structure of the HKU4-RBD/hCD26 complex revealed a hCD26-binding mode similar overall to that observed for MERS-RBD. HKU4-RBD, however, is less adapted to hCD26 than MERS-RBD, explaining its lower affinity for receptor binding. Our findings support a bat origin for MERS-CoV and indicate the need for surveillance of HKU4-related viruses in bats.

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Primary Citation of related structures