Japan Agency for Medical Research and Development (AMED)
JP21am0101093
Japan
Japan Agency for Medical Research and Development (AMED)
JP22ama121037
Japan
Japan Science and Technology
JPMJCR20H8
Japan
Japan Society for the Promotion of Science (JSPS)
JPJSCCA20190008
Japan
Japan Society for the Promotion of Science (JSPS)
20H05773
Japan
Japan Society for the Promotion of Science (JSPS)
JP20H05873
Japan
Citation
Journal: Nat Commun / Year: 2024 Title: Virological characteristics of the SARS-CoV-2 Omicron XBB.1.5 variant. Authors: Tomokazu Tamura / Takashi Irie / Sayaka Deguchi / Hisano Yajima / Masumi Tsuda / Hesham Nasser / Keita Mizuma / Arnon Plianchaisuk / Saori Suzuki / Keiya Uriu / Mst Monira Begum / Ryo ...Authors: Tomokazu Tamura / Takashi Irie / Sayaka Deguchi / Hisano Yajima / Masumi Tsuda / Hesham Nasser / Keita Mizuma / Arnon Plianchaisuk / Saori Suzuki / Keiya Uriu / Mst Monira Begum / Ryo Shimizu / Michael Jonathan / Rigel Suzuki / Takashi Kondo / Hayato Ito / Akifumi Kamiyama / Kumiko Yoshimatsu / Maya Shofa / Rina Hashimoto / Yuki Anraku / Kanako Terakado Kimura / Shunsuke Kita / Jiei Sasaki / Kaori Sasaki-Tabata / Katsumi Maenaka / Naganori Nao / Lei Wang / Yoshitaka Oda / / Terumasa Ikeda / Akatsuki Saito / Keita Matsuno / Jumpei Ito / Shinya Tanaka / Kei Sato / Takao Hashiguchi / Kazuo Takayama / Takasuke Fukuhara / Abstract: Circulation of SARS-CoV-2 Omicron XBB has resulted in the emergence of XBB.1.5, a new Variant of Interest. Our phylogenetic analysis suggests that XBB.1.5 evolved from XBB.1 by acquiring the S486P ...Circulation of SARS-CoV-2 Omicron XBB has resulted in the emergence of XBB.1.5, a new Variant of Interest. Our phylogenetic analysis suggests that XBB.1.5 evolved from XBB.1 by acquiring the S486P spike (S) mutation, subsequent to the acquisition of a nonsense mutation in ORF8. Neutralization assays showed similar abilities of immune escape between XBB.1.5 and XBB.1. We determine the structural basis for the interaction between human ACE2 and the S protein of XBB.1.5, showing similar overall structures between the S proteins of XBB.1 and XBB.1.5. We provide the intrinsic pathogenicity of XBB.1 and XBB.1.5 in hamsters. Importantly, we find that the ORF8 nonsense mutation of XBB.1.5 resulted in impairment of MHC suppression. In vivo experiments using recombinant viruses reveal that the XBB.1.5 mutations are involved with reduced virulence of XBB.1.5. Together, our study identifies the two viral functions defined the difference between XBB.1 and XBB.1.5.
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 291 K / Instrument: FEI VITROBOT MARK IV / Details: blotting time 5 s and blotting force 5..
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Electron microscopy
Microscope
TFS KRIOS
Specialist optics
Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recording
Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number real images: 7474 / Average exposure time: 1.5 sec. / Average electron dose: 50.4 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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