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Title: Structural basis of the Cope rearrangement and cyclization in hapalindole biogenesis

Journal Article · · Nature Chemical Biology

Hapalindole alkaloids are a structurally diverse class of cyanobacterial natural products defined by their varied polycyclic ring systems and diverse biological activities. These complex metabolites are generated from a common biosynthetic intermediate by the Stig cyclases in three mechanistic steps: a rare Cope rearrangement, 6-exo-trig cyclization, and electrophilic aromatic substitution. In this work, we report the structure of HpiC1, a Stig cyclase that catalyzes the formation of 12-epi-hapalindole U in vitro. The 1.5-Å structure revealed a dimeric assembly with two calcium ions per monomer and with the active sites located at the distal ends of the protein dimer. Mutational analysis and computational methods uncovered key residues for an acid-catalyzed [3,3]-sigmatropic rearrangement, as well as specific determinants that control the position of terminal electrophilic aromatic substitution, leading to a switch from hapalindole to fischerindole alkaloids.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE; National Institutes of Health (NIH); National Science Foundation (NSF)
Grant/Contract Number:
CHE-1700982; CA70375; OCI-1053575
OSTI ID:
1558297
Journal Information:
Nature Chemical Biology, Vol. 14, Issue 4; ISSN 1552-4450
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

References (60)

Crystal Structure of Pentalenene Synthase: Mechanistic Insights on Terpenoid Cyclization Reactions in Biology journal September 1997
An approach to computing electrostatic charges for molecules journal April 1984
Dali server: conservation mapping in 3D journal May 2010
Hapalindole/Ambiguine Biogenesis Is Mediated by a Cope Rearrangement, C–C Bond-Forming Cascade journal December 2015
Catalysis of the Cope and Claisen rearrangements journal June 1984
Insecticidal activity of 12-epi-hapalindole J isonitrile journal October 2007
Routine Microsecond Molecular Dynamics Simulations with AMBER on GPUs. 2. Explicit Solvent Particle Mesh Ewald journal August 2013
Comparison of simple potential functions for simulating liquid water journal July 1983
What are the dielectric ?constants? of proteins and how to validate electrostatic models? journal January 2001
Structural basis for carbohydrate-binding specificity—A comparative assessment of two engineered carbohydrate-binding modules journal March 2012
Atomic Structures of the Human Immunophilin FKBP-12 Complexes with FK506 and Rapamycin journal January 1993
Hapalindoles from the Cyanobacterium Fischerella : Potential Sodium Channel Modulators journal October 2014
Antimicrobial Ambiguine Isonitriles from the Cyanobacterium Fischerella ambigua journal May 2009
[3,3]-Sigmatropic rearrangements: recent applications in the total synthesis of natural products journal January 2009
Development and testing of a general amber force field journal January 2004
Approximate evaluations of the electrostatic free energy and internal energy changes in solution processes journal March 1982
Inference of Macromolecular Assemblies from Crystalline State journal September 2007
XDS journal January 2010
Hapalindole-related alkaloids from the cultured cyanobacterium Fischerella ambigua journal December 2010
A well-behaved electrostatic potential based method using charge restraints for deriving atomic charges: the RESP model journal October 1993
A Novel, Noncatalytic Carbohydrate-binding Module Displays Specificity for Galactose-containing Polysaccharides through Calcium-mediated Oligomerization journal March 2011
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
Computational Investigations of Carbenium Ion Reactions Relevant to Sterol Biosynthesis journal November 1997
Calcium Binding and Thermostability of Carbohydrate Binding Module CBM4-2 of Xyn10A from Rhodothermus marinus journal May 2002
Effect of the damping function in dispersion corrected density functional theory journal March 2011
Antimicrobial Ambiguines from the Cyanobacterium Fischerella sp. Collected in Israel journal February 2007
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
Isochorismate Pyruvate Lyase:  A Pericyclic Reaction Mechanism? journal November 2005
On the Dielectric “Constant” of Proteins: Smooth Dielectric Function for Macromolecular Modeling and Its Implementation in DelPhi journal March 2013
Decoding cyclase-dependent assembly of hapalindole and fischerindole alkaloids journal March 2017
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density journal January 1988
Particle mesh Ewald: An N ⋅log( N ) method for Ewald sums in large systems journal June 1993
Biosynthesis of Ambiguine Indole Alkaloids in Cyanobacterium Fischerella ambigua journal November 2013
ff14SB: Improving the Accuracy of Protein Side Chain and Backbone Parameters from ff99SB journal July 2015
Features and development of Coot journal March 2010
Atomic charges derived from semiempirical methods journal May 1990
Identification of an antimicrobial entity from the cyanobacterium Fischerella sp. isolated from bark of Azadirachta indica (Neem) tree journal February 2006
REFMAC 5 for the refinement of macromolecular crystal structures journal March 2011
Electrostatic interaction of a solute with a continuum. A direct utilizaion of AB initio molecular potentials for the prevision of solvent effects journal February 1981
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Molecular and genetic basis for early stage structural diversifications in hapalindole-type alkaloid biogenesis journal January 2017
Welwitindolinones, Unusual Alkaloids from the Blue-Green Algae Hapalosiphon welwitschii and Westiella intricata. Relationship to Fischerindoles and Hapalinodoles journal November 1994
A Cope Rearrangement in the Reaction Catalyzed by Dimethylallyltryptophan Synthase? journal August 2011
Structure and Function of a Squalene Cyclase journal September 1997
Structural Basis for Cyclic Terpene Biosynthesis by Tobacco 5-Epi-Aristolochene Synthase journal September 1997
Mechanistic studies on the indole prenyltransferases journal January 2015
Discovery of a Calcium-Dependent Enzymatic Cascade for the Selective Assembly of Hapalindole-Type Alkaloids: On the Biosynthetic Origin of Hapalindole U journal June 2017
The Introduction of Substituted Vinyl Groups. V. A Rearrangement Involving the Migration of an Allyl Group in a Three-Carbon System 1 journal February 1940
GEPOL: An improved description of molecular surfaces. III. A new algorithm for the computation of a solvent-excluding surface: GEPOL journal October 1994
Phaser crystallographic software journal July 2007
Discovery of a Calcium-Dependent Enzymatic Cascade for the Selective Assembly of Hapalindole-Type Alkaloids: On the Biosynthetic Origin of Hapalindole U journal June 2017
Exploring the gas access routes in a [NiFeSe] hydrogenase using crystals pressurized with krypton and oxygen journal August 2020
Improving the specificity of organophosphorus hydrolase to acephate by mutagenesis at its binding site: a computational study journal May 2021
PARP1 exhibits enhanced association and catalytic efficiency with γH2A.X-nucleosome journal December 2019
Cavin1 intrinsically disordered domains are essential for fuzzy electrostatic interactions and caveola formation journal February 2021
A unit of revolution journal September 2020
NADPH levels affect cellular epigenetic state by inhibiting HDAC3–Ncor complex journal January 2021
Non-covalent double bond sensors for gas-phase infrared spectroscopy of unsaturated fatty acids text January 2021
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density text January 1988
PHENIX: a comprehensive Python-based system for macromolecular structure solution. text January 2010

Cited By (10)

Enzymkaskadenreaktionen in der Biosynthese journal February 2019
The Crystal Structure of a Class of Cyclases that Catalyze the Cope Rearrangement journal October 2018
Enzymatic Cascade Reactions in Biosynthesis journal May 2019
The Crystal Structure of a Class of Cyclases that Catalyze the Cope Rearrangement journal November 2018
Structural basis for stereoselective dehydration and hydrogen-bonding catalysis by the SAM-dependent pericyclase LepI journal July 2019
The hidden enzymology of bacterial natural product biosynthesis journal June 2019
Terpene synthases in disguise: enzymology, structure, and opportunities of non-canonical terpene synthases journal January 2020
Structural insights into the calcium dependence of Stig cyclases journal January 2019
The Energetic Viability of Δ1-Piperideine Dimerization in Lysine-derived Alkaloid Biosynthesis journal August 2018
Molecular basis for the plasticity of aromatic prenyltransferases in hapalindole biosynthesis journal January 2019