5kjs
From Proteopedia
(Difference between revisions)
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== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/HST_ARATH HST_ARATH]] Acyltransferase involved in the biosynthesis of lignin. Accepts caffeoyl-CoA and p-coumaroyl-CoA as substrates and transfers the acyl group on both shikimate and quinate acceptors.<ref>PMID:15161961</ref> | [[http://www.uniprot.org/uniprot/HST_ARATH HST_ARATH]] Acyltransferase involved in the biosynthesis of lignin. Accepts caffeoyl-CoA and p-coumaroyl-CoA as substrates and transfers the acyl group on both shikimate and quinate acceptors.<ref>PMID:15161961</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Hydroxycinnamoyl-CoA:shikimate hydroxycinnamoyltransferase (HCT) is an essential acyltransferase that mediates flux through plant phenylpropanoid metabolism by catalyzing a reaction between p-coumaroyl-CoA and shikimate, yet it also exhibits broad substrate permissiveness in vitro. How do enzymes like HCT avoid functional derailment by cellular metabolites that qualify as non-native substrates? Here, we combine X-ray crystallography and molecular dynamics to reveal distinct dynamic modes of HCT under native and non-native catalysis. We find that essential electrostatic and hydrogen-bonding interactions between the ligand and active site residues, permitted by active site plasticity, are elicited more effectively by shikimate than by other non-native substrates. This work provides a structural basis for how dynamic conformational states of HCT favor native over non-native catalysis by reducing the number of futile encounters between the enzyme and shikimate. | ||
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| + | Dynamic Conformational States Dictate Selectivity toward the Native Substrate in a Substrate-Permissive Acyltransferase.,Levsh O, Chiang YC, Tung CF, Noel JP, Wang Y, Weng JK Biochemistry. 2016 Nov 2. PMID:27805809<ref>PMID:27805809</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 5kjs" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 03:38, 10 December 2016
Crystal Structure of Arabidopsis thaliana HCT
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