View source for 4oo2


==Streptomyces globisporus C-1027 FAD dependent (S)-3-chloro-&#946;-tyrosine-S-SgcC2 C-5 hydroxylase SgcC apo form==
<StructureSection load='4oo2' size='340' side='right'caption='[[4oo2]], [[Resolution|resolution]] 2.63&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4oo2]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_globisporus Streptomyces globisporus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4OO2 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4OO2 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]] 2.63&#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=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=4oo2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4oo2 OCA], [https://pdbe.org/4oo2 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4oo2 RCSB], [https://www.ebi.ac.uk/pdbsum/4oo2 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4oo2 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SGCC_STRGL SGCC_STRGL] Oxygenase component of a two-component system involved in the biosynthesis of the enediyne antitumor antibiotic C-1027 (PubMed:18426211). Uses FADH(2) supplied by SgcE6 to catalyze the C-5 hydroxylation of (S)-3-chloro-beta-tyrosyl-S-SgcC2 (PubMed:18426211). Can also efficiently catalyze the regioselective hydroxylation of other 3-substituted beta-tyrosyl-S-SgcC2 analogs, including the bromo-, iodo-, fluoro-, and methyl-substituted analogs, but does not accept 3-hydroxy-beta-tyrosyl-S-SgcC2 as a substrate (PubMed:18426211). Is only active with SgcC2 (peptidyl carrier protein)-tethered substrates (PubMed:18426211).<ref>PMID:18426211</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
C-1027 is a chromoprotein enediyne antitumor antibiotic produced by Streptomyces globisporus. In the last step of biosynthesis of the (S)-3-chloro-5-hydroxy-beta-tyrosine moiety of the C-1027 enediyne chromophore, SgcE6 and SgcC compose a two-component monooxygenase that hydroxylates the C-5 position of (S)-3-chloro-beta-tyrosine. This two-component monooxygenase is remarkable for two reasons. (i) SgcE6 specifically reacts with FAD and NADH, and (ii) SgcC is active with only the peptidyl carrier protein (PCP)-tethered substrate. To address the molecular details of substrate specificity, we determined the crystal structures of SgcE6 and SgcC at 1.66 and 2.63 A resolution, respectively. SgcE6 shares a similar beta-barrel fold with the class I HpaC-like flavin reductases. A flexible loop near the active site of SgcE6 plays a role in FAD binding, likely by providing sufficient space to accommodate the AMP moiety of FAD, when compared to that of FMN-utilizing homologues. SgcC shows structural similarity to a few other known FADH2-dependent monooxygenases and sheds light on some biochemically but not structurally characterized homologues. The crystal structures reported here provide insights into substrate specificity, and comparison with homologues provides a catalytic mechanism of the two-component, FADH2-dependent monooxygenase (SgcE6 and SgcC) that catalyzes the hydroxylation of a PCP-tethered substrate.

Crystal Structures of SgcE6 and SgcC, the Two-Component Monooxygenase That Catalyzes Hydroxylation of a Carrier Protein-Tethered Substrate during the Biosynthesis of the Enediyne Antitumor Antibiotic C-1027 in Streptomyces globisporus.,Chang CY, Lohman JR, Cao H, Tan K, Rudolf JD, Ma M, Xu W, Bingman CA, Yennamalli RM, Bigelow L, Babnigg G, Yan X, Joachimiak A, Phillips GN Jr, Shen B Biochemistry. 2016 Sep 13;55(36):5142-54. doi: 10.1021/acs.biochem.6b00713. Epub , 2016 Sep 1. PMID:27560143<ref>PMID:27560143</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 4oo2" style="background-color:#fffaf0;"></div>

==See Also==
*[[Monooxygenase 3D structures|Monooxygenase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Streptomyces globisporus]]
[[Category: Bingman CA]]
[[Category: Cao H]]
[[Category: Lohman JR]]
[[Category: Phillips Jr GN]]
[[Category: Shen B]]
[[Category: Xu W]]
[[Category: Yennamalli R]]