View source for 6jpw


==Crystal structure of Zika NS2B-NS3 protease with compound 1C==
<StructureSection load='6jpw' size='340' side='right'caption='[[6jpw]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6jpw]] is a 11 chain structure with sequence from [https://en.wikipedia.org/wiki/Zika_virus Zika virus] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6JPW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6JPW FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.951&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=C0F:(4~{R})-2-[4-[(2~{S})-2,3-bis(azanyl)-3-oxidanylidene-propyl]pyridin-2-yl]-4,5-dihydro-1,3-thiazole-4-carboxylic+acid'>C0F</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=6jpw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6jpw OCA], [https://pdbe.org/6jpw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6jpw RCSB], [https://www.ebi.ac.uk/pdbsum/6jpw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6jpw ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/POLG_ZIKV POLG_ZIKV] Protein C: Encapsulates the genomic RNA.[UniProtKB:P17763]  prM: Acts as a chaperone for envelope protein E during intracellular virion assembly by masking and inactivating envelope protein E fusion peptide. prM is matured in the last step of virion assembly, presumably to avoid catastrophic activation of the viral fusion peptide induced by the acidic pH of the trans-Golgi network. After cleavage by host furin, the pr peptide is released in the extracellular medium and small envelope protein M and envelope protein E homodimers are dissociated.[UniProtKB:P17763]  Envelope protein E: Binding to host cell surface receptor is followed by virus internalization through clathrin-mediated endocytosis. Envelope protein E is subsequently involved in membrane fusion between virion and host late endosomes. Synthesized as a homodimer with prM which acts as a chaperone for envelope protein E. After cleavage of prM, envelope protein E dissociate from small envelope protein M and homodimerizes.[UniProtKB:P17763]  Non-structural protein 1: Involved in virus replication and regulation of the innate immune response.[UniProtKB:P17763]  Non-structural protein 2A: May be involved viral RNA replication and capsid assembly.[UniProtKB:P09732]  Non-structural protein 4A: Induces host endoplasmic reticulum membrane rearrangements leading to the formation of virus-induced membranous vesicles hosting the dsRNA and polymerase, functioning as a replication complex. NS4A might also regulate the ATPase activity of the helicase region of Serine protease NS3 chain.[UniProtKB:P17763]  Peptide 2k: Functions as a signal peptide for NS4B and is required for the interferon antagonism activity of the latter.[UniProtKB:P17763]  Non-structural protein 4B: Inhibits interferon (IFN)-induced host STAT1 phosphorylation and nuclear translocation, thereby preventing the establishment of cellular antiviral state by blocking the IFN-alpha/beta pathway.[UniProtKB:P17763]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Peptides featuring an N-terminal cysteine residue and the unnatural amino acid 3-(2-cyano-4-pyridyl)alanine (Cpa) cyclize spontaneously in aqueous solution at neutral pH. Cpa is readily available and easily introduced into peptides using standard solid-phase peptide synthesis. The reaction is orthogonal to all proteinogenic amino acids, including cysteine residues that are not at the N-terminus. A substrate peptide of the Zika virus NS2B-NS3 protease cyclized in this way produced an inhibitor of high affinity and proteolytic stability.

Biocompatible Macrocyclization between Cysteine and 2-Cyanopyridine Generates Stable Peptide Inhibitors.,Nitsche C, Onagi H, Quek JP, Otting G, Luo D, Huber T Org Lett. 2019 Jun 12. doi: 10.1021/acs.orglett.9b01545. PMID:31188009<ref>PMID:31188009</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6jpw" style="background-color:#fffaf0;"></div>

==See Also==
*[[Nonstructural protein 3D structures|Nonstructural protein 3D structures]]
*[[Virus protease 3D structures|Virus protease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Zika virus]]
[[Category: Quek JP]]