Structural and functional basis of VLDLR usage by Eastern equine encephalitis virus.
Cell
; 187(2): 360-374.e19, 2024 01 18.
Article
in En
| MEDLINE
| ID: mdl-38176410
ABSTRACT
The very-low-density lipoprotein receptor (VLDLR) comprises eight LDLR type A (LA) domains and supports entry of distantly related alphaviruses, including Eastern equine encephalitis virus (EEEV) and Semliki Forest virus (SFV). Here, by resolving multiple cryo-electron microscopy structures of EEEV-VLDLR complexes and performing mutagenesis and functional studies, we show that EEEV uses multiple sites (E1/E2 cleft and E2 A domain) to engage more than one LA domain simultaneously. However, no single LA domain is necessary or sufficient to support efficient EEEV infection. Whereas all EEEV strains show conservation of two VLDLR-binding sites, the EEEV PE-6 strain and a few other EEE complex members feature a single amino acid substitution that enables binding of LA domains to an additional site on the E2 B domain. These structural and functional analyses informed the design of a minimal VLDLR decoy receptor that neutralizes EEEV infection and protects mice from lethal challenge.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Receptors, LDL
/
Cryoelectron Microscopy
/
Encephalitis Virus, Eastern Equine
/
Encephalomyelitis, Equine
Limits:
Animals
Language:
En
Journal:
Cell
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: