View source for 2x25


==Free acetyl-CypA orthorhombic form==
<StructureSection load='2x25' size='340' side='right'caption='[[2x25]], [[Resolution|resolution]] 1.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2x25]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2X25 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2X25 FirstGlance]. <br>
</td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=ALY:N(6)-ACETYLLYSINE'>ALY</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1vbs|1vbs]], [[1oca|1oca]], [[1mf8|1mf8]], [[2cyh|2cyh]], [[1cwb|1cwb]], [[1vbt|1vbt]], [[1m9e|1m9e]], [[1cwl|1cwl]], [[1cwc|1cwc]], [[1cwi|1cwi]], [[1cwo|1cwo]], [[1rmh|1rmh]], [[1cwj|1cwj]], [[2rmb|2rmb]], [[1m9c|1m9c]], [[1cwa|1cwa]], [[1cwf|1cwf]], [[1m9y|1m9y]], [[3cyh|3cyh]], [[1m9f|1m9f]], [[4cyh|4cyh]], [[1cwh|1cwh]], [[1bck|1bck]], [[1w8v|1w8v]], [[1awr|1awr]], [[1nmk|1nmk]], [[1mik|1mik]], [[1awv|1awv]], [[1m9d|1m9d]], [[1awt|1awt]], [[2cpl|2cpl]], [[1fgl|1fgl]], [[1m9x|1m9x]], [[1m63|1m63]], [[1cwk|1cwk]], [[5cyh|5cyh]], [[1ak4|1ak4]], [[3cys|3cys]], [[2alf|2alf]], [[1aws|1aws]], [[1w8l|1w8l]], [[1awu|1awu]], [[1w8m|1w8m]], [[2rma|2rma]], [[1cwm|1cwm]], [[1awq|1awq]], [[2x2d|2x2d]], [[2x2a|2x2a]], [[2x2c|2x2c]]</div></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Peptidylprolyl_isomerase Peptidylprolyl isomerase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.2.1.8 5.2.1.8] </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=2x25 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2x25 OCA], [https://pdbe.org/2x25 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2x25 RCSB], [https://www.ebi.ac.uk/pdbsum/2x25 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2x25 ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/PPIA_HUMAN PPIA_HUMAN]] PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides. 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/x2/2x25_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2x25 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Cyclophilin A (CypA) is a ubiquitous cis-trans prolyl isomerase with key roles in immunity and viral infection. CypA suppresses T-cell activation through cyclosporine complexation and is required for effective HIV-1 replication in host cells. We show that CypA is acetylated in diverse human cell lines and use a synthetically evolved acetyllysyl-tRNA synthetase/tRNA(CUA) pair to produce recombinant acetylated CypA in Escherichia coli. We determined atomic-resolution structures of acetylated CypA and its complexes with cyclosporine and HIV-1 capsid. Acetylation markedly inhibited CypA catalysis of cis to trans isomerization and stabilized cis rather than trans forms of the HIV-1 capsid. Furthermore, CypA acetylation antagonized the immunosuppressive effects of cyclosporine by inhibiting the sequential steps of cyclosporine binding and calcineurin inhibition. Our results reveal that acetylation regulates key functions of CypA in immunity and viral infection and provide a general set of mechanisms by which acetylation modulates interactions to regulate cell function.

Acetylation regulates cyclophilin A catalysis, immunosuppression and HIV isomerization.,Lammers M, Neumann H, Chin JW, James LC Nat Chem Biol. 2010 May;6(5):331-7. Epub 2010 Apr 4. PMID:20364129<ref>PMID:20364129</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2x25" style="background-color:#fffaf0;"></div>

==See Also==
*[[Cyclophilin 3D structures|Cyclophilin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Peptidylprolyl isomerase]]
[[Category: Chin, J W]]
[[Category: James, L C]]
[[Category: Lammers, M]]
[[Category: Neumann, H]]
[[Category: Hiv-1]]
[[Category: Host-virus interaction]]
[[Category: Isomerase]]