5WSN

Structure of Japanese encephalitis virus

Summary for 5WSN

• Entry DOI: 10.2210/pdb5wsn/pdb
• EMDB information: 6685
• Descriptor: E protein, M protein (2 entities in total)
• Functional Keywords: japanese encephalitis virus, viral entry, flavivirus, neurotropism, virus
• Biological source: Japanese encephalitis virus; More
• Total number of polymer chains: 6
• Total formula weight: 185277.52

Authors

Wang, X.,Zhu, L.,Li, S.,Yuan, S.,Qin, C.,Fry, E.E.,Stuart, I.D.,Rao, Z. (deposition date: 2016-12-07, release date: 2017-05-17, Last modification date: 2024-10-23)

Primary citation

Wang, X.,Li, S.H.,Zhu, L.,Nian, Q.G.,Yuan, S.,Gao, Q.,Hu, Z.,Ye, Q.,Li, X.F.,Xie, D.Y.,Shaw, N.,Wang, J.,Walter, T.S.,Huiskonen, J.T.,Fry, E.E.,Qin, C.F.,Stuart, D.I.,Rao, Z.
Near-atomic structure of Japanese encephalitis virus reveals critical determinants of virulence and stability
Nat Commun, 8:14-14, 2017

PubMed Abstract: Although several different flaviviruses may cause encephalitis, Japanese encephalitis virus is the most significant, being responsible for thousands of deaths each year in Asia. The structural and molecular basis of this encephalitis is not fully understood. Here, we report the cryo-electron microscopy structure of mature Japanese encephalitis virus at near-atomic resolution, which reveals an unusual "hole" on the surface, surrounded by five encephalitic-specific motifs implicated in receptor binding. Glu138 of E, which is highly conserved in encephalitic flaviviruses, maps onto one of these motifs and is essential for binding to neuroblastoma cells, with the E138K mutation abrogating the neurovirulence and neuroinvasiveness of Japanese encephalitis virus in mice. We also identify structural elements modulating viral stability, notably Gln264 of E, which, when replaced by His264 strengthens a hydrogen-bonding network, leading to a more stable virus. These studies unveil determinants of neurovirulence and stability in Japanese encephalitis virus, opening up new avenues for therapeutic interventions against neurotropic flaviviruses.Japanese encephalitis virus (JEV) is a Flavivirus responsible for thousands of deaths every year for which there are no specific anti-virals. Here, Wang et al. report the cryo-EM structure of mature JEV at near-atomic resolution and identify structural elements that modulate stability and virulence.

PubMed: 28446752
DOI: 10.1038/s41467-017-00024-6

Experimental method

ELECTRON MICROSCOPY (4.3 Å)