期刊
CELL HOST & MICROBE
卷 24, 期 4, 页码 569-+出版社
CELL PRESS
DOI: 10.1016/j.chom.2018.09.010
关键词
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资金
- National Institutes of Health (NIH) [R56 AI127371]
- Centers for Research on Influenza Pathogenesis (CRIP) [HHSN272201400008C]
- Leading Advanced Projects for Medical Innovation (LEAP) from the Japan Agency for Medical Research and Development (AMED) [JP17am001007]
- Ministry of Education, Culture, Science, Sports, and Technology (MEXT) of Japan [16H06429, 16K21723, 16H06434]
- Japan Initiative for Global Research Network on Infectious Diseases (J-GRID) from the MEXT of Japan
Discovery and characterization of broadly neutralizing antibodies (bnAbs) to the influenza hemagglutinin (HA) stem have provided insights for the development of a universal flu vaccine. Identification of signature features common to bnAbs from different individuals will be key to guiding immunogen design. S9-3-37 is a bnAb isolated from a healthy H5N1 vaccinee. Here, structural characterization reveals that the D3-9 gene segment of S9-3-37 contributes most of the interaction surface with the highly conserved stem epitope on HA. Comparison with other influenza bnAb crystal structures indicates that the D3-9 segment provides a general mechanism for targeting HA stem. Interestingly, such bnAbs can approach the HA stem with vastly different angles and orientations. Moreover, D3-9 can be translated in different reading frames in different bnAbs yet still target the same HA stem pocket. Thus, the D3-9 gene segment in the human immune repertoire can provide a robust defense against influenza virus.
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