View source for 9bt9


==Cryo-EM Structure of HKU1 spike D1 Domain (Active state, locally refined)==
<StructureSection load='9bt9' size='340' side='right'caption='[[9bt9]], [[Resolution|resolution]] 2.11&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9bt9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_coronavirus_HKU1 Human coronavirus HKU1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9BT9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9BT9 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.11&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <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=9bt9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9bt9 OCA], [https://pdbe.org/9bt9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9bt9 RCSB], [https://www.ebi.ac.uk/pdbsum/9bt9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9bt9 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SPIKE_CVHN1 SPIKE_CVHN1] S1 attaches the virion to the cell membrane by interacting with cell receptors, initiating the infection.  S2 is a class I viral fusion protein. Under the current model, the protein has at least 3 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. Presumably interacts with target cell lipid raft after cell attachment (By similarity).
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</StructureSection>
[[Category: Human coronavirus HKU1]]
[[Category: Large Structures]]
[[Category: Jin M]]
[[Category: Rini JM]]