Virology. 2017 Oct 18;513:98-107. doi: 10.1016/j.virol.2017.10.010. [Epub ahead of print]
Determinant of receptor-preference switch in influenza hemagglutinin.
Ni F1, Kondrashkina E2, Wang Q3.
Author information
Abstract
Influenza pandemic occurs when a new strain from other animal species overcomes the inter-species barriers and supports rapid human-to-human transmission. A critical prerequisite to this process is that hemagglutinin (HA) acquires a few key mutations to switch from avian receptors to human receptors. Previous studies suggest that H1 and H2/H3 HAs use different sets of mutations for the switch. This report shows that HA from the 1918 H1N1 pandemic virus (1918H1 HA) adopts the set of mutations used by H2/H3 HAs in receptor-preference switch when its 130-loop is made similar to those of H2/H3 HAs. Thus, the 130-loop appears to be the key determinant for the different mutations employed by pandemic H1 or H2/H3 HA. The correlation of the mutational routes and the 130-loop as unraveled in this study opens the door for efficient investigation of mutations required by other HA subtypes for inter-human airborne transmission.
Copyright ? 2017 Elsevier Inc. All rights reserved.
KEYWORDS:
Human adaptation; Influenza pandemics; Inter-human airborne transmission; Receptor binding; The 130-loop
PMID: 29055255 DOI: 10.1016/j.virol.2017.10.010
Determinant of receptor-preference switch in influenza hemagglutinin.
Ni F1, Kondrashkina E2, Wang Q3.
Author information
Abstract
Influenza pandemic occurs when a new strain from other animal species overcomes the inter-species barriers and supports rapid human-to-human transmission. A critical prerequisite to this process is that hemagglutinin (HA) acquires a few key mutations to switch from avian receptors to human receptors. Previous studies suggest that H1 and H2/H3 HAs use different sets of mutations for the switch. This report shows that HA from the 1918 H1N1 pandemic virus (1918H1 HA) adopts the set of mutations used by H2/H3 HAs in receptor-preference switch when its 130-loop is made similar to those of H2/H3 HAs. Thus, the 130-loop appears to be the key determinant for the different mutations employed by pandemic H1 or H2/H3 HA. The correlation of the mutational routes and the 130-loop as unraveled in this study opens the door for efficient investigation of mutations required by other HA subtypes for inter-human airborne transmission.
Copyright ? 2017 Elsevier Inc. All rights reserved.
KEYWORDS:
Human adaptation; Influenza pandemics; Inter-human airborne transmission; Receptor binding; The 130-loop
PMID: 29055255 DOI: 10.1016/j.virol.2017.10.010