PMID: 19838188 , Related PDB id: 3IT8
Authors:
Yang Z, West AP Jr, Bjorkman PJ
Title:
Crystal structure of TNFalpha complexed with a poxvirus MHC-related TNF binding protein.
Journal:
Nat Struct Mol Biol. 2009 Nov;16(11):1189-91. Epub 2009 Oct 18.
Abstract:
The poxvirus 2L protein binds tumor necrosis factor-alpha (TNFalpha) to inhibit host antiviral and immune responses. The 2.8-A 2L-TNFalpha structure reveals three symmetrically arranged 2L molecules per TNFalpha trimer. 2L resembles class I major histocompatibility complex (MHC) molecules but lacks a peptide-binding groove and beta2-microglobulin light chain. Overlap between the 2L and host TNF receptor-binding sites on TNFalpha rationalizes 2L inhibition of TNFalpha-TNF receptor interactions and prevention of TNFalpha-induced immune responses.