View source for 7sct


==Crystal Structure of the Tick Evasin EVA-AAM1001 Complexed to Human Chemokine CCL16==
<StructureSection load='7sct' size='340' side='right'caption='[[7sct]], [[Resolution|resolution]] 1.84&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7sct]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Amblyomma_americanum Amblyomma americanum] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7SCT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7SCT 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]] 1.84&#8491;</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=7sct FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7sct OCA], [https://pdbe.org/7sct PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7sct RCSB], [https://www.ebi.ac.uk/pdbsum/7sct PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7sct ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/E1243_AMBAM E1243_AMBAM] Salivary chemokine-binding protein which has chemokine-neutralizing activity and binds to host chemokines CCL1, CCL3, CCL3L1, CCL4, CCL4L1, CCL5, CCL7, CCL8, CCL13, CCL14, CCL15, CCL16, CCL17, CCL18, CCL19, CCL20, CCL21, CCL22, CCL23, CCL24, CCL27, XCL1, CX3CL1, CXCL1, CXCL2, CXCL4, CXCL5, CXCL6, CXCL7, CXCL9, CXCL12 and CXCL14.<ref>PMID:29679010</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Chemokines are key regulators of leukocyte trafficking and attractive targets for anti-inflammatory therapy. Evasins are chemokine-binding proteins from tick saliva, whose application as anti-inflammatory therapeutics will require manipulation of their chemokine target selectivity. Here we describe subclass A3 evasins, which are unique to the tick genus Amblyomma and distinguished from "classical" class A1 evasins by an additional disulfide bond near the chemokine recognition interface. The A3 evasin EVA-AAM1001 (EVA-A) bound to CC chemokines and inhibited their receptor activation. Unlike A1 evasins, EVA-A was not highly dependent on N- and C-terminal regions to differentiate chemokine targets. Structures of chemokine-bound EVA-A revealed a deep hydrophobic pocket, unique to A3 evasins, that interacts with the residue immediately following the CC motif of the chemokine. Mutations to this pocket altered the chemokine selectivity of EVA-A. Thus, class A3 evasins provide a suitable platform for engineering proteins with applications in research, diagnosis or anti-inflammatory therapy.

Engineering broad-spectrum inhibitors of inflammatory chemokines from subclass A3 tick evasins.,Devkota SR, Aryal P, Pokhrel R, Jiao W, Perry A, Panjikar S, Payne RJ, Wilce MCJ, Bhusal RP, Stone MJ Nat Commun. 2023 Jul 14;14(1):4204. doi: 10.1038/s41467-023-39879-3. PMID:37452046<ref>PMID:37452046</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7sct" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Amblyomma americanum]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Aryal P]]
[[Category: Bhusal RP]]
[[Category: Devkota SR]]
[[Category: Stone MJ]]
[[Category: Wilce MCJ]]