- EMDB-53679: Local refinement of the N-terminal domain (NTD) and receptor bind... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-53679
タイトル
Local refinement of the N-terminal domain (NTD) and receptor binding domain (RBD) from the Porcine hemagglutinating encephalomyelitis virus (PHEV) Spike in the closed conformation
マップデータ
試料
複合体: Spike
タンパク質・ペプチド: Spike glycoprotein
リガンド: 2-acetamido-2-deoxy-beta-D-glucopyranose
キーワード
Coronavirus / Spike / Entry / VIRAL PROTEIN
機能・相同性
機能・相同性情報
host cell endoplasmic reticulum-Golgi intermediate compartment membrane / receptor-mediated virion attachment to host cell / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / host cell plasma membrane / virion membrane / membrane 類似検索 - 分子機能
ジャーナル: Nat Microbiol / 年: 2025 タイトル: Dipeptidase 1 is a functional receptor for a porcine coronavirus. 著者: Jérémy Dufloo / Ignacio Fernández / Atousa Arbabian / Ahmed Haouz / Nigel Temperton / Luis G Gimenez-Lirola / Félix A Rey / Rafael Sanjuán / 要旨: Coronaviruses of the subgenus Embecovirus include several important pathogens, such as the human seasonal coronaviruses HKU1 and OC43, bovine coronavirus and porcine haemagglutinating ...Coronaviruses of the subgenus Embecovirus include several important pathogens, such as the human seasonal coronaviruses HKU1 and OC43, bovine coronavirus and porcine haemagglutinating encephalomyelitis virus (PHEV). While sialic acid is thought to be required for embecovirus entry, protein receptors remain unknown for most of these viruses. Here we show that PHEV does not require sialic acid for entry and instead uses dipeptidase 1 (DPEP1) as a receptor. Cryo-electron microscopy at 3.4-4.4 Å resolution revealed that, unlike other embecoviruses, PHEV displays both open and closed conformations of its spike trimer at steady state. The spike receptor-binding domain (RBD) exhibits extremely high sequence variability across embecoviruses, and we found that DPEP1 usage is specific to PHEV. In contrast, the X-ray structure of the RBD-DPEP1 complex at 2.25 Å showed that the structural elements involved in receptor binding are conserved, highlighting the remarkable versatility of this structural organization in adopting novel receptor specificities.