skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Dynamic Conformational States Dictate Selectivity toward the Native Substrate in a Substrate-Permissive Acyltransferase

Journal Article · · Biochemistry
 [1];  [2];  [2];  [3];  [2];  [1]
  1. Whitehead Institute for Biomedical Research, Cambridge, MA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. The Chinese Univ. of Hong Kong (China)
  3. Howard Hughes Medical Inst., Jack H. Skirball Center for Chemical Biology & Proteomics, The Salk Inst. for Biological Studies, La Jolla, CA (United States)

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02–06CH11357
OSTI ID:
1353237
Journal Information:
Biochemistry, Vol. 55, Issue 45; ISSN 0006-2960
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 37 works
Citation information provided by
Web of Science

References (55)

The Remarkable Pliability and Promiscuity of Specialized Metabolism journal January 2012
Enzyme Recruitment in Evolution of New Function journal October 1976
Protein engineers turned evolutionists journal December 2007
Evolution of a Second Gene for  -Galactosidase in Escherichia coli journal June 1973
The 'evolvability' of promiscuous protein functions journal November 2004
Historical contingency and its biophysical basis in glucocorticoid receptor evolution journal June 2014
The Moderately Efficient Enzyme: Evolutionary and Physicochemical Trends Shaping Enzyme Parameters journal May 2011
Network Context and Selection in the Evolution to Enzyme Specificity journal August 2012
Exploring protein fitness landscapes by directed evolution journal December 2009
Laboratory evolution of a soluble, self-sufficient, highly active alkane hydroxylase journal October 2002
Directed evolution of mammalian paraoxonases PON1 and PON3 for bacterial expression and catalytic specialization journal December 2003
The Rise of Chemodiversity in Plants journal June 2012
Acyltransferases in plants: a good time to be BAHD journal June 2006
The Selaginella Genome Identifies Genetic Changes Associated with the Evolution of Vascular Plants journal May 2011
Chemodiversity in Selaginella: a reference system for parallel and convergent metabolic evolution in terrestrial plants journal January 2013
The origin and evolution of lignin biosynthesis: Tansley review journal June 2010
Phenylpropanoid Biosynthesis journal January 2010
The meta-hydroxylation step in the phenylpropanoid pathway: a new level of complexity in the pathway and its regulation journal June 2006
Functional characterization of two acyltransferases from Populus trichocarpa capable of synthesizing benzyl benzoate and salicyl benzoate, potential intermediates in salicinoid phenolic glycoside biosynthesis journal May 2015
Molecular Characterization of the Salutaridinol 7-O-Acetyltransferase Involved in Morphine Biosynthesis in Opium Poppy Papaver somniferum journal August 2001
Cloning and characterisation of rosmarinic acid synthase from Melissa officinalis L. journal May 2011
Acetyltransfer in natural product biosynthesis––functional cloning and molecular analysis of vinorine synthase journal May 2004
Distinct substrate specificities and unusual substrate flexibilities of two hydroxycinnamoyltransferases, rosmarinic acid synthase and hydroxycinnamoyl-CoA:shikimate hydroxycinnamoyl-transferase, from Coleus blumei Benth. journal February 2011
Enzyme promiscuity: evolutionary and mechanistic aspects journal October 2006
Rosmarinic acid journal January 2003
Independent Recruitment of an O -Methyltransferase for Syringyl Lignin Biosynthesis in Selaginella moellendorffii journal July 2011
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
The Plant Genome Integrative Explorer Resource: PlantGenIE.org journal July 2015
Data access for the 1,000 Plants (1KP) project journal October 2014
T-coffee: a novel method for fast and accurate multiple sequence alignment 1 1Edited by J. Thornton journal September 2000
Deciphering key features in protein structures with the new ENDscript server journal April 2014
Elucidation of the Structure and Reaction Mechanism of Sorghum Hydroxycinnamoyltransferase and Its Structural Relationship to Other Coenzyme A-Dependent Transferases and Synthases journal April 2013
Secondary-structure matching (SSM), a new tool for fast protein structure alignment in three dimensions journal November 2004
KVFinder: steered identification of protein cavities as a PyMOL plugin journal January 2014
MEGA7: Molecular Evolutionary Genetics Analysis Version 7.0 for Bigger Datasets journal March 2016
MUSCLE: multiple sequence alignment with high accuracy and high throughput journal March 2004
An Improved General Amino Acid Replacement Matrix journal April 2008
VMD: Visual molecular dynamics journal February 1996
Scalable molecular dynamics with NAMD journal January 2005
Optimization of the Additive CHARMM All-Atom Protein Force Field Targeting Improved Sampling of the Backbone ϕ, ψ and Side-Chain χ 1 and χ 2 Dihedral Angles journal August 2012
CHARMM general force field: A force field for drug-like molecules compatible with the CHARMM all-atom additive biological force fields journal January 2009
Extension of the CHARMM general force field to sulfonyl-containing compounds and its utility in biomolecular simulations journal July 2012
Automation of the CHARMM General Force Field (CGenFF) I: Bond Perception and Atom Typing journal November 2012
Crystal Structure of Vinorine Synthase, the First Representative of the BAHD Superfamily journal January 2005
A Structural Basis for the Biosynthesis of the Major Chlorogenic Acids Found in Coffee journal July 2012
Evolution of rosmarinic acid biosynthesis journal October 2009
The Moderately Efficient Enzyme: Futile Encounters and Enzyme Floppiness journal August 2015
Acetylcholinesterase: enzyme structure, reaction dynamics, and virtual transition states journal October 1987
A pulse radiolysis study of superoxide dismutase journal May 1972
cDNA cloning of a BAHD acyltransferase from soybean (Glycine max): Isoflavone 7-O-glucoside-6″-O-malonyltransferase journal August 2007
Negative Epistasis and Evolvability in TEM-1 β-Lactamase—The Thin Line between an Enzyme's Conformational Freedom and Disorder journal July 2015
The role of protein dynamics in the evolution of new enzyme function journal September 2016
Intrinsic dynamics of an enzyme underlies catalysis journal November 2005
Long-Range Dynamic Effects of Point Mutations Propagate through Side Chains in the Serine Protease Inhibitor Eglin c journal October 2004
Evaluation of Energetic and Dynamic Coupling Networks in a PDZ Domain Protein journal December 2006

Cited By (4)

PBS3 and EPS1 Complete Salicylic Acid Biosynthesis from Isochorismate in Arabidopsis journal December 2019
Structural and dynamic basis of substrate permissiveness in hydroxycinnamoyltransferase (HCT) journal October 2018
COSY catalyses trans–cis isomerization and lactonization in the biosynthesis of coumarins journal September 2019
Independent evolution of rosmarinic acid biosynthesis in two sister families under the Lamiids clade of flowering plants journal September 2019