5epo: Difference between revisions

From Proteopedia
Jump to navigationJump to search
← Older edit
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,331,613 edits
No edit summary
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,331,613 edits
No edit summary
 
Line 10: Line 10:
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/HDHA_CLOSR HDHA_CLOSR] 7alpha-hydroxysteroid dehydrogenase that catalyzes the NADP(+)-dependent oxidation of the 7alpha-hydroxy group of 7alpha-hydroxysteroids, such as cholate, chenodeoxycholate, glycochenodeoxycholate and taurochenodeoxycholate, to the corresponding 7-oxosteroids (PubMed:22198717, PubMed:24810359). Is also able to catalyze the reverse reduction reactions (PubMed:22198717). Together with 7beta-HSDH encoded in the adjacent gene, is likely involved in the epimerization of the hydroxy group at C-7 of primary bile acids through 7-keto bile acid intermediates (PubMed:22198717).<ref>PMID:22198717</ref> <ref>PMID:24810359</ref>  
[https://www.uniprot.org/uniprot/HDHA_CLOSR HDHA_CLOSR] 7alpha-hydroxysteroid dehydrogenase that catalyzes the NADP(+)-dependent oxidation of the 7alpha-hydroxy group of 7alpha-hydroxysteroids, such as cholate, chenodeoxycholate, glycochenodeoxycholate and taurochenodeoxycholate, to the corresponding 7-oxosteroids (PubMed:22198717, PubMed:24810359). Is also able to catalyze the reverse reduction reactions (PubMed:22198717). Together with 7beta-HSDH encoded in the adjacent gene, is likely involved in the epimerization of the hydroxy group at C-7 of primary bile acids through 7-keto bile acid intermediates (PubMed:22198717).<ref>PMID:22198717</ref> <ref>PMID:24810359</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
7alpha-hydroxysteroid dehydrogenase (7alpha-HSDH) can catalyse the oxidation of C7 alpha-OH of the steroid nucleus in the bile acid metabolism. In the paper we determined the crystal structure of 7alpha-HSDH from Clostridium absonum (CA 7alpha-HSDH) complexed with taurochenodeoxycholic acid (TCDCA) and NADP(+) by X-ray diffraction, which, as a tetramer, possesses the typical alpha/beta folding pattern. The four subunits of an asymmetric unit lie in the fact that there are the stable hydrophobic interactions between Q-axis-related subunits. Significantly, we captured an active state of the NADP(+), confirming that nicotinamide moiety of NADP(+) act as electron carrier in the dehydrogenation. On the basis of crystal structure analysis, site-directed mutagenesis and MD simulation, furthermore, we find that the guanidinium of Arg38 can form the stable cation-pi interaction with the adenine ring of NADP(+), and the cation-pi interaction and hydrogen bonds between Arg38 and NADP(+) have a significant anchor effect on the cofactor binding to CA 7alpha-HSDH.
The three-dimensional structure of Clostridium absonum 7alpha-hydroxysteroid dehydrogenase: new insights into the conserved arginines for NADP(H) recognition.,Lou D, Wang B, Tan J, Zhu L, Cen X, Ji Q, Wang Y Sci Rep. 2016 Mar 10;6:22885. doi: 10.1038/srep22885. PMID:26961171<ref>PMID:26961171</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5epo" style="background-color:#fffaf0;"></div>


==See Also==
==See Also==
Retrieved from "https://proteopedia.org/5epo"