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==Elucidation of the structure and reaction mechanism of Sorghum bicolor hydroxycinnamoyltransferase and its structural relationship to other CoA-dependent transferases and synthases==
==Elucidation of the structure and reaction mechanism of Sorghum bicolor hydroxycinnamoyltransferase and its structural relationship to other CoA-dependent transferases and synthases==
<StructureSection load='4ke4' size='340' side='right' caption='[[4ke4]], [[Resolution|resolution]] 2.01&Aring;' scene=''>
<StructureSection load='4ke4' size='340' side='right'caption='[[4ke4]], [[Resolution|resolution]] 2.01&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4ke4]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Sorghum_bicolor Sorghum bicolor]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KE4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4KE4 FirstGlance]. <br>
<table><tr><td colspan='2'>[[4ke4]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Sorghum_bicolor Sorghum bicolor]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KE4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4KE4 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene></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]] 2.012&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4kec|4kec]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Sb04g025760, SORBIDRAFT_04g025760 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4558 Sorghum bicolor])</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=4ke4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ke4 OCA], [https://pdbe.org/4ke4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ke4 RCSB], [https://www.ebi.ac.uk/pdbsum/4ke4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ke4 ProSAT]</span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ke4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ke4 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ke4 RCSB], [http://www.ebi.ac.uk/pdbsum/4ke4 PDBsum]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Function ==
== Publication Abstract from PubMed ==
[https://www.uniprot.org/uniprot/C5XXB7_SORBI C5XXB7_SORBI]
Hydroxycinnamoyltransferase (SbHCT) from Sorghum bicolor participates in an early step of the phenylpropanoid pathway, exchanging CoA esterified to p-coumaric acid with shikimic or quinic acid, as intermediates in the biosynthesis of the monolignols coniferyl acohol and sinapyl alcohol. In order to elucidate the mode of action of this enzyme, we have determined the crystal structures of SbHCT in its apo-form and ternary complex with shikimate and p-coumaroyl CoA, which was converted to its product during crystal soaking. The structure revealed the roles of Thr36, Ser38, Tyr40, His162, Arg371 and Thr384 in catalysis and specificity. Based on the exact chemistry of p-coumaroyl CoA and shikimic acid in the active site and analysis of kinetic and thermodynamic data of wild-type and mutants, we propose a role for His162 and Thr36 in the catalytic mechanism of HCT . Considering the calorimetric data, substrate binding of SbHCT should occur sequentially, with p-coumaroyl CoA binding prior to the acyl acceptor molecule. While some HCT's can use both shikimate and quinate as an acyl acceptor, SbHCT displays low activity toward quinate. Comparison of the structure of Sorghum HCT with the HCT involved in chlorogenic acid synthesis in coffee (Coffea canephora) revealed many shared features. Taken together, these observations explain how CoA-dependent transferases with similar structural features can participate in different biochemical pathways across species.
 
Elucidation of the structure and reaction mechanism of Sorghum bicolor hydroxycinnamoyltransferase and its structural relationship to other CoA-dependent transferases and synthases.,Walker AM, Hayes RP, Youn B, Vermerris W, Sattler SE, Kang C Plant Physiol. 2013 Apr 26. PMID:23624856<ref>PMID:23624856</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
==See Also==
</div>
*[[Serum Paraoxonase|Serum Paraoxonase]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Sorghum bicolor]]
[[Category: Sorghum bicolor]]
[[Category: Hayes, R P]]
[[Category: Hayes RP]]
[[Category: Kang, C]]
[[Category: Kang C]]
[[Category: Sattler, S E]]
[[Category: Sattler SE]]
[[Category: Vermerris, W]]
[[Category: Vermerris W]]
[[Category: Walker, A M]]
[[Category: Walker AM]]
[[Category: Youn, B]]
[[Category: Youn B]]
[[Category: Hydroxycinnamoyl transferase]]
[[Category: Transferase]]

Latest revision as of 15:11, 1 March 2024

Elucidation of the structure and reaction mechanism of Sorghum bicolor hydroxycinnamoyltransferase and its structural relationship to other CoA-dependent transferases and synthasesElucidation of the structure and reaction mechanism of Sorghum bicolor hydroxycinnamoyltransferase and its structural relationship to other CoA-dependent transferases and synthases

Structural highlights

4ke4 is a 1 chain structure with sequence from Sorghum bicolor. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.012Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

C5XXB7_SORBI

See Also

4ke4, resolution 2.01Å

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