8h13: Difference between revisions

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[8h13]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome_coronavirus Severe acute respiratory syndrome coronavirus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8H13 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8H13 FirstGlance]. <br>
<table><tr><td colspan='2'>[[8h13]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndrome_coronavirus Severe acute respiratory syndrome coronavirus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8H13 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8H13 FirstGlance]. <br>
</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>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 4.05&#8491;</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>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8h13 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8h13 OCA], [https://pdbe.org/8h13 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8h13 RCSB], [https://www.ebi.ac.uk/pdbsum/8h13 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8h13 ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8h13 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8h13 OCA], [https://pdbe.org/8h13 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8h13 RCSB], [https://www.ebi.ac.uk/pdbsum/8h13 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8h13 ProSAT]</span></td></tr>
</table>
</table>

Latest revision as of 09:22, 19 July 2023

PDB: Structure of SARS-CoV-1 Spike Protein with Engineered x2 Disulfide (G400C and V969C), Closed ConformationPDB: Structure of SARS-CoV-1 Spike Protein with Engineered x2 Disulfide (G400C and V969C), Closed Conformation

Structural highlights

8h13 is a 3 chain structure with sequence from Severe acute respiratory syndrome coronavirus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Electron Microscopy, Resolution 4.05Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

SPIKE_SARS May down-regulate host tetherin (BST2) by lysosomal degradation, thereby counteracting its antiviral activity.[1] 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][2] [3] 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][4]

References

  1. ↑ Wang SM, Huang KJ, Wang CT. Severe acute respiratory syndrome coronavirus spike protein counteracts BST2-mediated restriction of virus-like particle release. J Med Virol. 2019 Oct;91(10):1743-1750. doi: 10.1002/jmv.25518. Epub 2019 Jul 10. PMID:31199522 doi:http://dx.doi.org/10.1002/jmv.25518
  2. ↑ Wong SK, Li W, Moore MJ, Choe H, Farzan M. A 193-amino acid fragment of the SARS coronavirus S protein efficiently binds angiotensin-converting enzyme 2. J Biol Chem. 2004 Jan 30;279(5):3197-201. Epub 2003 Dec 11. PMID:14670965 doi:http://dx.doi.org/10.1074/jbc.C300520200
  3. ↑ Jeffers SA, Tusell SM, Gillim-Ross L, Hemmila EM, Achenbach JE, Babcock GJ, Thomas WD Jr, Thackray LB, Young MD, Mason RJ, Ambrosino DM, Wentworth DE, Demartini JC, Holmes KV. CD209L (L-SIGN) is a receptor for severe acute respiratory syndrome coronavirus. Proc Natl Acad Sci U S A. 2004 Nov 2;101(44):15748-53. doi:, 10.1073/pnas.0403812101. Epub 2004 Oct 20. PMID:15496474 doi:http://dx.doi.org/10.1073/pnas.0403812101
  4. ↑ Belouzard S, Chu VC, Whittaker GR. Activation of the SARS coronavirus spike protein via sequential proteolytic cleavage at two distinct sites. Proc Natl Acad Sci U S A. 2009 Apr 7;106(14):5871-6. doi:, 10.1073/pnas.0809524106. Epub 2009 Mar 24. PMID:19321428 doi:http://dx.doi.org/10.1073/pnas.0809524106

8h13, resolution 4.05Å

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