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From Proteopedia
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== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/PRDX3_HUMAN PRDX3_HUMAN]] Involved in redox regulation of the cell. Protects radical-sensitive enzymes from oxidative damage by a radical-generating system. Acts synergistically with MAP3K13 to regulate the activation of NF-kappa-B in the cytosol.<ref>PMID:12492477</ref> | [[http://www.uniprot.org/uniprot/PRDX3_HUMAN PRDX3_HUMAN]] Involved in redox regulation of the cell. Protects radical-sensitive enzymes from oxidative damage by a radical-generating system. Acts synergistically with MAP3K13 to regulate the activation of NF-kappa-B in the cytosol.<ref>PMID:12492477</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Peroxiredoxins are antioxidant proteins primarily responsible for detoxification of hydroperoxides in cells. On exposure to various cellular stresses, peroxiredoxins can acquire chaperone activity, manifested as quaternary reorganization into a high molecular weight (HMW) form. Acidification, for example, causes dodecameric rings of human peroxiredoxin 3 (HsPrx3) to stack into long helical filaments. In this work, a 4.1-A resolution structure of low-pH-instigated helical filaments was elucidated, showing a locally unfolded active site and partially folded C terminus. A 2.8-A crystal structure of HsPrx3 was determined at pH 8.5 under reducing conditions, wherein dodecameric rings are arranged as a short stack, with symmetry similar to low-pH filaments. In contrast to previous observations, the crystal structure displays both a fully folded active site and ordered C terminus, suggesting that the HsPrx3 HMW form maintains catalytic activity. We propose a new role for the HMW form as a self-chaperoning assembly maintaining HsPrx3 function under stress. | ||
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| + | Structures of Human Peroxiredoxin 3 Suggest Self-Chaperoning Assembly that Maintains Catalytic State.,Yewdall NA, Venugopal H, Desfosses A, Abrishami V, Yosaatmadja Y, Hampton MB, Gerrard JA, Goldstone DC, Mitra AK, Radjainia M Structure. 2016 May 24. pii: S0969-2126(16)30074-0. doi:, 10.1016/j.str.2016.04.013. PMID:27238969<ref>PMID:27238969</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 5jcg" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 07:29, 20 June 2016
Structure of Human Peroxiredoxin 3 as three stacked rings
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