3tkp: Difference between revisions
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==Crystal structure of full-length human peroxiredoxin 4 in the reduced form== | |||
<StructureSection load='3tkp' size='340' side='right'caption='[[3tkp]], [[Resolution|resolution]] 2.49Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3tkp]] is a 5 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=3TKP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3TKP 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]] 2.49Å</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=3tkp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tkp OCA], [https://pdbe.org/3tkp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3tkp RCSB], [https://www.ebi.ac.uk/pdbsum/3tkp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3tkp ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/PRDX4_HUMAN PRDX4_HUMAN] Probably involved in redox regulation of the cell. Regulates the activation of NF-kappa-B in the cytosol by a modulation of I-kappa-B-alpha phosphorylation.<ref>PMID:9388242</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Prx4 (peroxiredoxin 4) is the only peroxiredoxin located in the ER (endoplasmic reticulum) and a proposed scavenger for H2O2. In this work we presented crystal structures of human Prx4 in three different redox forms and characterized the reaction features of Prx4 with H2O2. Prx4 exhibits a toroid-shaped decamer constructed of five catalytic dimers. Structural analysis revealed conformational changes around helix alpha2 and the C-terminal reigon with a YF motif from the partner subunit, which are required for inter-chain disulfide formation between Cys87 and Cys208, a critical step of the catalysis. The structural explanation for the restricting role of the YF motif on the active site dynamics is provided in detail. Prx4 has a high reactivity to H2O2, but is susceptible to over-oxidation and consequent inactivation by H2O2. Either deletion of the YF motif or dissociation into dimers decreased the susceptibility of Prx4 to over-oxidation by increasing the flexibility of Cys87. | |||
Structural insights into the peroxidase activity and inactivation of human peroxiredoxin 4.,Wang X, Wang L, Wang X, Sun F, Wang CC Biochem J. 2011 Sep 15. PMID:21916849<ref>PMID:21916849</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 3tkp" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
*[[Peroxiredoxin|Peroxiredoxin]] | *[[Peroxiredoxin 3D structures|Peroxiredoxin 3D structures]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Sun | [[Category: Sun F]] | ||
[[Category: Wang | [[Category: Wang C-C]] | ||
[[Category: Wang | [[Category: Wang L]] | ||
[[Category: Wang | [[Category: Wang X]] | ||
