ジャーナル: Cell / 年: 2023 タイトル: TMEM106B is a receptor mediating ACE2-independent SARS-CoV-2 cell entry. 著者: Jim Baggen / Maarten Jacquemyn / Leentje Persoons / Els Vanstreels / Valerie E Pye / Antoni G Wrobel / Valeria Calvaresi / Stephen R Martin / Chloë Roustan / Nora B Cronin / Eamonn Reading / ...著者: Jim Baggen / Maarten Jacquemyn / Leentje Persoons / Els Vanstreels / Valerie E Pye / Antoni G Wrobel / Valeria Calvaresi / Stephen R Martin / Chloë Roustan / Nora B Cronin / Eamonn Reading / Hendrik Jan Thibaut / Thomas Vercruysse / Piet Maes / Frederik De Smet / Angie Yee / Toey Nivitchanyong / Marina Roell / Natalia Franco-Hernandez / Herve Rhinn / Alusha Andre Mamchak / Maxime Ah Young-Chapon / Eric Brown / Peter Cherepanov / Dirk Daelemans / 要旨: SARS-CoV-2 is associated with broad tissue tropism, a characteristic often determined by the availability of entry receptors on host cells. Here, we show that TMEM106B, a lysosomal transmembrane ...SARS-CoV-2 is associated with broad tissue tropism, a characteristic often determined by the availability of entry receptors on host cells. Here, we show that TMEM106B, a lysosomal transmembrane protein, can serve as an alternative receptor for SARS-CoV-2 entry into angiotensin-converting enzyme 2 (ACE2)-negative cells. Spike substitution E484D increased TMEM106B binding, thereby enhancing TMEM106B-mediated entry. TMEM106B-specific monoclonal antibodies blocked SARS-CoV-2 infection, demonstrating a role of TMEM106B in viral entry. Using X-ray crystallography, cryogenic electron microscopy (cryo-EM), and hydrogen-deuterium exchange mass spectrometry (HDX-MS), we show that the luminal domain (LD) of TMEM106B engages the receptor-binding motif of SARS-CoV-2 spike. Finally, we show that TMEM106B promotes spike-mediated syncytium formation, suggesting a role of TMEM106B in viral fusion. Together, our findings identify an ACE2-independent SARS-CoV-2 infection mechanism that involves cooperative interactions with the receptors heparan sulfate and TMEM106B.