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==Structure determination of N-terminal fragment of UL49.5 protein from bovine herpesvirus 1 by NMR spectroscopy and molecular dynamics==
<StructureSection load='6qan' size='340' side='right'caption='[[6qan]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6qan]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bovine_alphaherpesvirus_1 Bovine alphaherpesvirus 1]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6QAN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6QAN FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ABA:ALPHA-AMINOBUTYRIC+ACID'>ABA</scene>, <scene name='pdbligand=NH2:AMINO+GROUP'>NH2</scene>, <scene name='pdbligand=NLE:NORLEUCINE'>NLE</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=6qan FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6qan OCA], [https://pdbe.org/6qan PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6qan RCSB], [https://www.ebi.ac.uk/pdbsum/6qan PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6qan ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q89806_9ALPH Q89806_9ALPH] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The transporter associated with antigen processing (TAP) directly participates in the immune response as a key component of the cytosolic peptide to major histocompatibility complex (MHC) class I protein loading machinery. This makes TAP an important target for viruses avoiding recognition by CD8+ T lymphocytes. Its activity can be suppressed by the UL49.5 protein produced by bovine herpesvirus 1, although the mechanism of this inhibition has not been understood so far. Therefore, the main goal of our study was to investigate the 3D structure of bovine herpesvirus 1 - encoded UL49.5 protein. The final structure of the inhibitor was established using circular dichroism (CD), 2D nuclear magnetic resonance (NMR), and molecular dynamics (MD) in membrane mimetic environments. In NMR studies, UL49.5 was represented by two fragments: the extracellular region (residues 1-35) and the transmembrane-intracellular fragment (residues 36-75), displaying various functions during viral invasion. After the empirical structure determination, a molecular docking procedure was used to predict the complex of UL49.5 with the TAP heterodimer. Our results revealed that UL49.5 adopted a highly flexible membrane-proximal helical structure in the extracellular part. In the transmembrane region, we observed two short alpha-helices. Furthermore, the cytoplasmic part had an unordered structure. Finally, we propose three different orientations of UL49.5 in the complex with TAP. Our studies provide, for the first time, the experimental structural information on UL49.5 and structure-based insight in its mechanism of action which might be helpful in designing new drugs against viral infections.

Structure determination of UL49.5 transmembrane protein from bovine herpesvirus 1 by NMR spectroscopy and molecular dynamics.,Karska N, Graul M, Sikorska E, Zhukov I, Slusarz MJ, Kasprzykowski F, Lipinska AD, Rodziewicz-Motowidlo S Biochim Biophys Acta Biomembr. 2019 Feb 14;1861(5):926-938. doi:, 10.1016/j.bbamem.2019.02.005. PMID:30772281<ref>PMID:30772281</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6qan" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Bovine alphaherpesvirus 1]]
[[Category: Large Structures]]
[[Category: Karska N]]
[[Category: Rodziewicz-Motowidlo S]]