View source for 5ex2


==Crystal structure of cyclophilin AquaCyp293 from Hirschia baltica==
<StructureSection load='5ex2' size='340' side='right'caption='[[5ex2]], [[Resolution|resolution]] 1.29&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5ex2]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Hirschia_baltica_ATCC_49814 Hirschia baltica ATCC 49814]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5EX2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5EX2 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]] 1.294&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=5ex2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ex2 OCA], [https://pdbe.org/5ex2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5ex2 RCSB], [https://www.ebi.ac.uk/pdbsum/5ex2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5ex2 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C6XJ17_HIRBI C6XJ17_HIRBI] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Cyclophilins are ubiquitous cis-trans-prolyl isomerases (PPIases) found in all kingdoms of life. Here, we identify a novel family of cyclophilins, termed AquaCyps, which specifically occurs in marine Alphaproteobacteria, but not in related terrestric species. In addition to a canonical PPIase domain, AquaCyps contain large extensions and insertions. The crystal structures of two representatives from Hirschia baltica, AquaCyp293 and AquaCyp300, reveal the formation of a compact domain, the NIC domain, by the N- and C-terminal extensions together with a central insertion. The NIC domain adopts a novel mixed alpha-helical, beta-sheet fold that is linked to the cyclophilin domain via a conserved disulfide bond. In its overall fold, AquaCyp293 resembles AquaCyp300, but the two proteins utilize distinct sets of active site residues, consistent with differences in their PPIase catalytic properties. While AquaCyp293 is a highly active general PPIase, AquaCyp300 is specific for hydrophobic substrate peptides and exhibits lower overall activity.

Structural and Functional Characterization of a Novel Family of Cyclophilins, the AquaCyps.,Jakob RP, Schmidpeter PA, Koch JR, Schmid FX, Maier T PLoS One. 2016 Jun 8;11(6):e0157070. doi: 10.1371/journal.pone.0157070., eCollection 2016. PMID:27276069<ref>PMID:27276069</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5ex2" style="background-color:#fffaf0;"></div>

==See Also==
*[[Cyclophilin 3D structures|Cyclophilin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Hirschia baltica ATCC 49814]]
[[Category: Large Structures]]
[[Category: Jakob RP]]
[[Category: Maier T]]