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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1ef7]] is a 2 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=1EF7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EF7 FirstGlance]. <br>
<table><tr><td colspan='2'>[[1ef7]] is a 2 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=1EF7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EF7 FirstGlance]. <br>
</td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Cathepsin_X Cathepsin X], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.18.1 3.4.18.1] </span></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.67&#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=1ef7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ef7 OCA], [https://pdbe.org/1ef7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ef7 RCSB], [https://www.ebi.ac.uk/pdbsum/1ef7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ef7 ProSAT]</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=1ef7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ef7 OCA], [https://pdbe.org/1ef7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ef7 RCSB], [https://www.ebi.ac.uk/pdbsum/1ef7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ef7 ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[https://www.uniprot.org/uniprot/CATZ_HUMAN CATZ_HUMAN]] Exhibits carboxy-monopeptidase as well as carboxy-dipeptidase activity.  
[https://www.uniprot.org/uniprot/CATZ_HUMAN CATZ_HUMAN] Exhibits carboxy-monopeptidase as well as carboxy-dipeptidase activity.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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</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=1ef7 ConSurf].
</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=1ef7 ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
BACKGROUND: Cathepsin X is a widespread, abundantly expressed papain-like mammalian lysosomal cysteine protease. It exhibits carboxy-monopeptidase as well as carboxy-dipeptidase activity and shares a similar activity profile with cathepsin B. The latter has been implicated in normal physiological events as well as in various pathological states such as rheumatoid arthritis, Alzheimer's disease and cancer progression. Thus the question is raised as to which of the two enzyme activities has actually been monitored. RESULTS: The crystal structure of human cathepsin X has been determined at 2.67 A resolution. The structure shares the common features of a papain-like enzyme fold, but with a unique active site. The most pronounced feature of the cathepsin X structure is the mini-loop that includes a short three-residue insertion protruding into the active site of the protease. The residue Tyr27 on one side of the loop forms the surface of the S1 substrate-binding site, and His23 on the other side modulates both carboxy-monopeptidase as well as carboxy-dipeptidase activity of the enzyme by binding the C-terminal carboxyl group of a substrate in two different sidechain conformations. CONCLUSIONS: The structure of cathepsin X exhibits a binding surface that will assist in the design of specific inhibitors of cathepsin X as well as of cathepsin B and thereby help to clarify the physiological roles of both proteases.
Crystal structure of cathepsin X: a flip-flop of the ring of His23 allows carboxy-monopeptidase and carboxy-dipeptidase activity of the protease.,Guncar G, Klemencic I, Turk B, Turk V, Karaoglanovic-Carmona A, Juliano L, Turk D Structure. 2000 Mar 15;8(3):305-13. PMID:10745011<ref>PMID:10745011</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1ef7" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
*[[Cathepsin 3D structures|Cathepsin 3D structures]]
*[[Cathepsin 3D structures|Cathepsin 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Cathepsin X]]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Guncar, G]]
[[Category: Guncar G]]
[[Category: Juliano, L]]
[[Category: Juliano L]]
[[Category: Karaoglanovic-Carmona, A]]
[[Category: Karaoglanovic-Carmona A]]
[[Category: Klemencic, I]]
[[Category: Klemencic I]]
[[Category: Turk, B]]
[[Category: Turk B]]
[[Category: Turk, D]]
[[Category: Turk D]]
[[Category: Turk, V]]
[[Category: Turk V]]
[[Category: Carboxypeptidase]]
[[Category: Cathepsin]]
[[Category: Cysteine protease]]
[[Category: Hydrolase]]
[[Category: Papain-like]]
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