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7x2j

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'''Unreleased structure'''
 
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The entry 7x2j is ON HOLD until Paper Publication
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==Crystal structure of nanobody Nb70 with SARS-CoV RBD==
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<StructureSection load='7x2j' size='340' side='right'caption='[[7x2j]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
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Authors:
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== Structural highlights ==
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<table><tr><td colspan='2'>[[7x2j]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome-related_coronavirus Severe acute respiratory syndrome-related coronavirus] and [https://en.wikipedia.org/wiki/Vicugna_pacos Vicugna pacos]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7X2J OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7X2J FirstGlance]. <br>
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Description:
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr>
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[[Category: Unreleased Structures]]
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7x2j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7x2j OCA], [https://pdbe.org/7x2j PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7x2j RCSB], [https://www.ebi.ac.uk/pdbsum/7x2j PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7x2j ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/SPIKE_SARS SPIKE_SARS] May down-regulate host tetherin (BST2) by lysosomal degradation, thereby counteracting its antiviral activity.<ref>PMID:31199522</ref> Attaches the virion to the cell membrane by interacting with host receptor, initiating the infection (By similarity). Binding to human ACE2 and CLEC4M/DC-SIGNR receptors and internalization of the virus into the endosomes of the host cell induces conformational changes in the S glycoprotein. Proteolysis by cathepsin CTSL may unmask the fusion peptide of S2 and activate membrane fusion within endosomes.[HAMAP-Rule:MF_04099]<ref>PMID:14670965</ref> <ref>PMID:15496474</ref> 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]<ref>PMID:19321428</ref>
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== References ==
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<references/>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
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[[Category: Severe acute respiratory syndrome-related coronavirus]]
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[[Category: Vicugna pacos]]
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[[Category: Li MX]]
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[[Category: Ren YF]]
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[[Category: Wang XQ]]
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[[Category: Zhang LQ]]

Revision as of 09:24, 21 December 2022

Crystal structure of nanobody Nb70 with SARS-CoV RBD

PDB ID 7x2j

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OCA

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