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Identification Taxonomy Ontology Physical properties Spectra Biological properties Concentrations Links References enzymes (10) Show 10 proteins XML

Record Information

Version

5.0

Status

Detected but not Quantified

Creation Date

2021-09-11 21:49:11 UTC

Update Date

2021-10-01 23:44:17 UTC

HMDB ID

HMDB0259299

Secondary Accession Numbers

None

Metabolite Identification

Common Name

Tropolone

Description

tropolone, also known as 2-hydroxytropone or purpurocatechol, belongs to the class of organic compounds known as tropolones. Tropolones are compounds containing tropone ring with a hydroxyl group at ring position 2. tropolone is a primary metabolite. Primary metabolites are metabolically or physiologically essential metabolites. They are directly involved in an organism’s growth, development or reproduction. Based on a literature review a significant number of articles have been published on tropolone. This compound has been identified in human blood as reported by (PMID: 31557052 ). Tropolone is not a naturally occurring metabolite and is only found in those individuals exposed to this compound or its derivatives. Technically Tropolone is part of the human exposome. The exposome can be defined as the collection of all the exposures of an individual in a lifetime and how those exposures relate to health. An individual's exposure begins before birth and includes insults from environmental and occupational sources.

Structure

MOL 3D MOL SDF 3D SDF PDB 3D PDB SMILES InChI

View in JSmol View NMR Assignments View Stereo Labels

Synonyms

Value	Source
2-Hydroxy-2,4,6-cycloheptatrien-1-one	ChEBI
2-Hydroxycyclohepta-2,4,6-trienone	ChEBI
2-Hydroxytropone	ChEBI
Purpurocatechol	ChEBI

Chemical Formula

C₇H₆O₂

Average Molecular Weight

122.1213

Monoisotopic Molecular Weight

122.036779436

IUPAC Name

2-hydroxycyclohepta-2,4,6-trien-1-one

Traditional Name

tropolone

CAS Registry Number

Not Available

SMILES

OC1=CC=CC=CC1=O

InChI Identifier

InChI=1S/C7H6O2/c8-6-4-2-1-3-5-7(6)9/h1-5H,(H,8,9)

InChI Key

MDYOLVRUBBJPFM-UHFFFAOYSA-N

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as tropolones. Tropolones are compounds containing tropone ring with a hydroxyl group at ring position 2.

Kingdom

Organic compounds

Super Class

Hydrocarbon derivatives

Class

Tropones

Sub Class

Tropolones

Direct Parent

Tropolones

Alternative Parents

Substituents

Tropolone
Cyclic ketone
Organic oxygen compound
Organic oxide
Organooxygen compound
Aromatic homomonocyclic compound

Molecular Framework

Aromatic homomonocyclic compounds

External Descriptors

cyclic ketone (CHEBI:79966 )

Ontology

Physiological effect

Not Available

Disposition

Biological location

Non-excretory biofluid

Biofluid or Excreta

Blood (PMID: 31557052)

Process

Not Available

Role

Not Available

Physical Properties

State

Not Available

Experimental Molecular Properties

Property	Value	Reference
Melting Point	Not Available	Not Available
Boiling Point	Not Available	Not Available
Water Solubility	Not Available	Not Available
LogP	Not Available	Not Available

Experimental Chromatographic Properties

Not Available

Predicted Molecular Properties

Property	Value	Source
logP	0.07	ALOGPS
logP	1.09	ChemAxon
logS	-0.71	ALOGPS
pKa (Strongest Acidic)	11.26	ChemAxon
pKa (Strongest Basic)	-2.8	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	2	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	37.3 Å²	ChemAxon
Rotatable Bond Count	0	ChemAxon
Refractivity	38.12 m³·mol⁻¹	ChemAxon
Polarizability	11.89 Å³	ChemAxon
Number of Rings	1	ChemAxon
Bioavailability	Yes	ChemAxon
Rule of Five	Yes	ChemAxon
Ghose Filter	No	ChemAxon
Veber's Rule	Yes	ChemAxon
MDDR-like Rule	No	ChemAxon

Predicted Chromatographic Properties

Predicted Collision Cross Sections

Predictor	Adduct Type	CCS Value (Å²)	Reference
DeepCCS	[M+H]+	124.644	30932474
DeepCCS	[M-H]-	121.939	30932474
DeepCCS	[M-2H]-	158.338	30932474
DeepCCS	[M+Na]+	133.092	30932474
AllCCS	[M+H]+	124.4	32859911
AllCCS	[M+H-H2O]+	119.4	32859911
AllCCS	[M+NH4]+	129.0	32859911
AllCCS	[M+Na]+	130.3	32859911
AllCCS	[M-H]-	119.0	32859911
AllCCS	[M+Na-2H]-	121.0	32859911
AllCCS	[M+HCOO]-	123.3	32859911

Predicted Kovats Retention Indices

Underivatized

Metabolite	SMILES	Kovats RI Value	Column Type	Reference
Tropolone	OC1=CC=CC=CC1=O	1968.0	Standard polar	33892256
Tropolone	OC1=CC=CC=CC1=O	1224.1	Standard non polar	33892256
Tropolone	OC1=CC=CC=CC1=O	1274.7	Semi standard non polar	33892256

Spectra

GC-MS Spectra

Spectrum Type	Description	Splash Key	Deposition Date	Source	View
Predicted GC-MS	Predicted GC-MS Spectrum - Tropolone GC-MS (1 TMS) - 70eV, Positive	Not Available	2020-06-30	Wishart Lab	View Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - Tropolone GC-MS (Non-derivatized) - 70eV, Positive	splash10-00di-8900000000-6ecfbb0f58c76ee8c14e	2021-09-23	Wishart Lab	View Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - Tropolone GC-MS (Non-derivatized) - 70eV, Positive	Not Available	2021-10-12	Wishart Lab	View Spectrum
Predicted GC-MS	Predicted GC-MS Spectrum - Tropolone GC-MS (TBDMS_1_1) - 70eV, Positive	Not Available	2021-11-05	Wishart Lab	View Spectrum

MS/MS Spectra

Spectrum Type	Description	Splash Key	Deposition Date	Source	View
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - Tropolone 10V, Positive-QTOF	splash10-00di-0900000000-c437e8c86668124c518c	2016-08-03	Wishart Lab	View Spectrum
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - Tropolone 20V, Positive-QTOF	splash10-00di-2900000000-d1bb6ef1743719754ac7	2016-08-03	Wishart Lab	View Spectrum
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - Tropolone 40V, Positive-QTOF	splash10-0fr6-9200000000-37fb95523cb619f42ff0	2016-08-03	Wishart Lab	View Spectrum
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - Tropolone 10V, Negative-QTOF	splash10-00di-0900000000-efaea1769aac41897ae3	2016-08-03	Wishart Lab	View Spectrum
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - Tropolone 20V, Negative-QTOF	splash10-00di-2900000000-b9402725c0c171be03cc	2016-08-03	Wishart Lab	View Spectrum
Predicted LC-MS/MS	Predicted LC-MS/MS Spectrum - Tropolone 40V, Negative-QTOF	splash10-0296-9100000000-96980092b6b109386463	2016-08-03	Wishart Lab	View Spectrum

NMR Spectra

Spectrum Type	Description	Deposition Date	Source	View
Predicted 1D NMR	¹³C NMR Spectrum (1D, 100 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 100 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 1000 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 1000 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 200 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 200 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 300 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 300 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 400 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 400 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 500 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 500 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 600 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 600 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 700 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 700 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 800 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 800 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹³C NMR Spectrum (1D, 900 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum
Predicted 1D NMR	¹H NMR Spectrum (1D, 900 MHz, D₂O, predicted)	2021-10-27	Wishart Lab	View Spectrum

Biological Properties

Cellular Locations

Not Available

Biospecimen Locations

Blood

Tissue Locations

Not Available

Pathways

Not Available

Name	SMPDB/PathBank	KEGG

Normal Concentrations

Biospecimen	Status	Value	Age	Sex	Condition	Reference	Details
Blood	Detected but not Quantified	Not Quantified	Not Specified	Not Specified	Normal	31557052	details

Abnormal Concentrations

Not Available

Associated Disorders and Diseases

Disease References

None

Associated OMIM IDs

None

External Links

DrugBank ID

Not Available

Phenol Explorer Compound ID

Not Available

FooDB ID

Not Available

KNApSAcK ID

Chemspider ID

KEGG Compound ID

BioCyc ID

BiGG ID

Not Available

Wikipedia Link

Tropolone

METLIN ID

Not Available

PubChem Compound

Not Available

PDB ID

Not Available

ChEBI ID

79966

Food Biomarker Ontology

Not Available

VMH ID

Not Available

MarkerDB ID

Not Available

Good Scents ID

rw1295771

References

Synthesis Reference

Not Available

Material Safety Data Sheet (MSDS)

Not Available

General References

Barupal DK, Fiehn O: Generating the Blood Exposome Database Using a Comprehensive Text Mining and Database Fusion Approach. Environ Health Perspect. 2019 Sep;127(9):97008. doi: 10.1289/EHP4713. Epub 2019 Sep 26. [PubMed:31557052 ]

Enzymes

Enzyme Details

1. 3-methylorcinaldehyde synthase

General function:: Not Available
Specific function:: Non-reducing polyketide synthase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:17912413, PubMed:29773797, PubMed:20552126). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASPKS1
Uniprot ID:: A5PHD6
Molecular weight:: 296112.47

Enzyme Details

2. Cytochrome P450 monooxygenase asR2

General function:: Not Available
Specific function:: Cytochrome P450 monooxygenase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASR2
Uniprot ID:: A0A2U8U2M8
Molecular weight:: 59131.855

Enzyme Details

3. FAD-dependent monooxygenase asL4

General function:: Not Available
Specific function:: Flavin-dependent monooxygenase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASL4
Uniprot ID:: A0A2U8U2L4
Molecular weight:: 47732.665

Enzyme Details

4. Oxidoreductase asL5

General function:: Not Available
Specific function:: Oxidoreductase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASL5
Uniprot ID:: A0A2U8U2K8
Molecular weight:: 25469.86

Enzyme Details

5. Xenovulene A biosynthesis cluster protein asL2

General function:: Not Available
Specific function:: Part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASL2
Uniprot ID:: A0A2U8U2L2
Molecular weight:: 12582.36

Enzyme Details

6. 2-oxoglutarate-dependent dioxygenase asL3

General function:: Not Available
Specific function:: 2-oxoglutarate-dependent dioxygenase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASL3
Uniprot ID:: A0A2U8U2L3
Molecular weight:: 37709.775

Enzyme Details

7. FAD-dependent monooxygenase asL6

General function:: Not Available
Specific function:: FAD-dependent monooxygenase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASL6
Uniprot ID:: A0A2U8U2L0
Molecular weight:: 46997.68

Enzyme Details

8. Putative hetero-Diels-Alderase asR5

General function:: Not Available
Specific function:: Putative hetero-Diels-Alderase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASR5
Uniprot ID:: A0A2U8U2M1
Molecular weight:: 44333.67

Enzyme Details

9. Salicylate hydroxylase asL1

General function:: Not Available
Specific function:: Salicylate hydroxylase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASL1
Uniprot ID:: A0A2U8U2L6
Molecular weight:: 53344.835

Enzyme Details

10. Alpha-humulene synthase asR6

General function:: Not Available
Specific function:: Alpha-humulene synthase; part of the gene cluster that mediates the biosynthesis of xenovulene A, an unusual meroterpenoid that has potent inhibitory effects on the human gamma-aminobutyrate A (GABAA) benzodiazepine receptor (PubMed:29773797). The first step of xenovulene A biosynthesis is the biosynthesis of 3-methylorcinaldehyde performed by the non-reducing polyketide synthase aspks1 (PubMed:17912413, PubMed:29773797, PubMed:20552126). The salicylate hydroxylase asL1 then catalyzes the oxidative dearomatization of 3-methylorcinaldehyde to yield a dearomatized hydroxycyclohexadione (PubMed:29773797). The 2-oxoglutarate-dependent dioxygenase asL3 further catalyzes the oxidative ring expansion to provide the first tropolone metabolite (PubMed:29773797). The cytochrome P450 monooxygenase asR2 allows the synthesis of tropolone hemiacetal (PubMed:29773797). In parallel, a previously unrecognised class of terpene cyclase, asR6, produces alpha-humulene from farnesylpyrophosphate (FPP) (PubMed:29773797). The putative Diels-Alderase asR5 probably catalyzes the formation of the tropolone-humulene skeleton by linking humulene and the polyketide moiety (PubMed:29773797). Oxidative-ring contractions catalyzed by asL4 and asL6 then processively remove carbon atoms from the polyketide to yield xenovulene A (PubMed:29773797).
Gene Name:: ASR6
Uniprot ID:: A0A2U8U2L5
Molecular weight:: 48386.605

Showing metabocard for Tropolone (HMDB0259299)

MOL for HMDB0259299 (Tropolone)

3D MOL for HMDB0259299 (Tropolone)

3D SDF for HMDB0259299 (Tropolone)

3D-SDF for HMDB0259299 (Tropolone)

PDB for HMDB0259299 (Tropolone)

3D PDB for HMDB0259299 (Tropolone)

SMILES for HMDB0259299 (Tropolone)

INCHI for HMDB0259299 (Tropolone)

Structure for HMDB0259299 (Tropolone)

3D Structure for HMDB0259299 (Tropolone)

Predicted Collision Cross Sections

Predicted Kovats Retention Indices

Underivatized

GC-MS Spectra

MS/MS Spectra

NMR Spectra

Enzymes