7ybk

SARS-CoV-2 B.1.620 variant spike (open state)

spinqualitylabelsall models 7ybk, resolution 3.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7ybk is a 3 chain structure with sequence from Severe acute respiratory syndrome coronavirus 2. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.9Å Ligands: FUC, MAN, NAG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SPIKE_SARS2 attaches the virion to the cell membrane by interacting with host receptor, initiating the infection (By similarity). Binding to human ACE2 receptor and internalization of the virus into the endosomes of the host cell induces conformational changes in the Spike glycoprotein (PubMed:32142651, PubMed:32075877, PubMed:32155444). Uses also human TMPRSS2 for priming in human lung cells which is an essential step for viral entry (PubMed:32142651). Proteolysis by cathepsin CTSL may unmask the fusion peptide of S2 and activate membranes fusion within endosomes.[HAMAP-Rule:MF_04099] mediates fusion of the virion and cellular membranes by acting as a class I viral fusion protein. Under the current model, the protein has at least three conformational states: pre-fusion native state, pre-hairpin intermediate state, and post-fusion hairpin state. During viral and target cell membrane fusion, the coiled coil regions (heptad repeats) assume a trimer-of-hairpins structure, positioning the fusion peptide in close proximity to the C-terminal region of the ectodomain. The formation of this structure appears to drive apposition and subsequent fusion of viral and target cell membranes.[HAMAP-Rule:MF_04099] Acts as a viral fusion peptide which is unmasked following S2 cleavage occurring upon virus endocytosis.[HAMAP-Rule:MF_04099] Publication Abstract from PubMed Deletion of residues 156-157 warps the neighboring beta-sheet and leads NTD and RBD to shift. * T859N stabilizes the packing of the 630 loop motif to make RBD standing transition more difficult. * The overall structures of the closed state S complex from different variants resemble each other. * Mutations in FPPR may affect the overall structure of the trimeric spike protein. Structures of SARS-CoV-2 spike protein alert noteworthy sites for the potential approaching variants.,Xing X, Wang L, Cui Z, Fu W, Zheng T, Qin L, Ge P, Qian A, Wang N, Yuan S Virol Sin. 2022 Dec;37(6):938-941. doi: 10.1016/j.virs.2022.11.003. Epub 2022 Nov , 8. PMID:36368512 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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