Hemagglutinin-neuraminidase refers to a single viral protein that has both hemagglutinin and neuraminidase activity. This is in contrast to the proteins found in influenza, where both functions exist but in two separate proteins. However it does show a structural similarity to influenza viral neuraminidase and has a six-bladed beta-propeller structure. Hemagglutinin-neuraminidase allows the virus to stick to a potential host cell, and cut itself loose if necessary. Hemagglutinin-neuraminidase can be found in a variety of paramyxoviruses including mumps virus, human parainfluenza virus 3, and the avian pathogen Newcastle disease virus.
Background References
1. Zaitsev V et al. Second sialic acid binding site in Newcastle disease virus hemagglutinin-neuraminidase: implications for fusion. J Virol. 2004 Apr;78(7):3733-41.
2. Lawrence MC et al. Structure of the haemagglutinin-neuraminidase from human parainfluenza virus type III. J Mol Biol. 2004 Jan 30;335(5):1343-57.
Sequence Similarity
Belongs to the paramyxoviruses hemagglutinin-neuraminidase family.
Western blot analysis of Hemagglutinin-neuraminidase on HEK293 cell lysates with Rabbit anti-Hemagglutinin-neuraminidase antibody (ER1803-50) at 1/5,000 dilution.