solanapyrone A

CHEBI:38229 EXACT SEEDED

What these status tags mean

Curation status describes a workflow state. SEEDED means the record entered through the source-seeding workflow; it does not imply that no later curation occurred. PROPOSED marks an addition awaiting review; REVIEWED records curator sign-off on identity, structure, filing class and producer claims; DEPRECATED retains a superseded or out-of-scope record. These are workflow decisions, not independently verified human review. Agent-assisted contributions may appear in the record history.

Grounding describes the identifier mapping: EXACT uses an ontology identity asserted by the source; MINTED keeps a local identifier when no defensible ontology identity is available; REVIEW_NEEDED flags an exact structure whose ontology identity needs adjudication. The grounding note retains any unresolved alternatives. These tags do not establish the strength of producer or activity evidence.

Structure

Standard InChIKey	AWQLNKJBXASXDU-SFDCBXKLSA-N
SMILES	C[C@H]1C=C[C@H]2CCCC[C@H]2[C@@H]1C3=CC(=C(C(=O)O3)C=O)OC
Stereochemistry	fully defined
Cross-references	npatlas:NPA019708

Filing pathway

Polyketides — computed by NPClassifier npclassifier.gnps2.org@2026-09-07, which is why it is pinned rather than recomputed. The gene cluster's asserted class is pks, from MIBiG.

Producer organisms 1

A claim that this taxon makes the compound. The basis says what the evidence addressed — a knockout and a database assertion are not the same claim.

Taxon	Basis	Cluster	Evidence
Ascochyta rabiei NCBITaxon:5454	BGC_CHARACTERIZED	mibig:BGC0002515	PMID:26342019

Occurrences 8

Somebody found the compound in this organism and cited it. That is not a claim that the organism makes it, and nothing here promotes one to the other.

Taxon	Source	Reference
Nigrospora NCBITaxon:114230	LOTUS	DOI:10.1016/J.PHYTOCHEM.2009.01.008
Alternaria tenuissima NCBITaxon:119927	LOTUS	DOI:10.1016/S0040-4039(00)87872-7
Alternaria solani NCBITaxon:48100	LOTUS	DOI:10.1016/S0040-4039(00)87872-7
Alternaria solani NCBITaxon:48100	LOTUS	DOI:10.1039/C39890001282
Alternaria solani NCBITaxon:48100	LOTUS	DOI:10.1271/BBB.62.2016
Mycosphaerella rabiei NCBITaxon:5454	LOTUS	DOI:10.1016/S0031-9422(00)98054-3
Mycosphaerella rabiei NCBITaxon:5454	LOTUS	DOI:10.1111/J.1439-0434.1991.TB00112.X
Mycosphaerella rabiei NCBITaxon:5454	LOTUS	DOI:10.1128/EC.00084-15

Biosynthetic gene clusters 1

Accession	Host	Locus evidence	Genome
mibig:BGC0002515	Ascochyta rabiei NCBITaxon:5454	CLUSTER_DEMONSTRATED	genbank:RYYQ01000008.1

A locus claim and a taxon claim are different questions. Heterologous expression settles the first and leaves the second where the isolation report left it.

Biosynthesis curated

Written by a curator with claim-level evidence on each step; not derived from a source. This is what the rest of the record exists to support.

Step	Enzyme	Reaction	Substrate → product	Evidence
1	Sol5 A.solani reference precursor UniProtKB:D7UQ40	RHEA:31683	CHEBI:63164 → CHEBI:38229	https://www.uniprot.org/uniprotkb/D7UQ40

Step 1: UniProtKB:D7UQ40 / MITE0000455 / RHEA:31683-reported cycloisomerization of prosolanapyrone III (CHEBI:63164) to solanapyrone A (CHEBI:38229) by Alternaria solani Sol5 (BAJ09785.1 on AB514562.1). Synchronizes biosynthetic_pathway with the existing database-backed causal_graph without upgrading producer or locus evidence grades.

Mechanism & Biosynthesis Overview

Causal graph — biosynthesis 4 nodes, 3 edges

UniProt-reported A.solani Sol5 cycloisomerization of prosolanapyrone III to solanapyrone A, distinct from the existing D-product graph. The full genomic precursor reference is sequence-verified; neither deposit specifies a strain. The owner's source producer is A.rabiei, not this protein's organism. MITE flags Sol5 functionality as unclear; this graph records UniProt's specific annotation, not a primary-evidence resolution. No producer upgrade or pathway finality; not full-record sign-off.

Subject	Predicate	Object	Notes	Evidence
Sol5 A.solani reference precursor	is_uniprot_reported_catalyst_of	UniProt-reported Sol5 A-product cycloisomerization	Current UniProt supplies activity attribution, not sequence matching alone. The precursor accession does not assert a native mature/secreted construct, signal cleavage, glycosylation, FAD state, binding site, complex or kinetic measurement. No A.rabiei sequence or activity is mapped to this A.solani protein.	https://www.uniprot.org/uniprotkb/D7UQ40 https://www.ncbi.nlm.nih.gov/protein/BAJ09785.1 https://www.ncbi.nlm.nih.gov/nuccore/AB514562.1 reference https://www.uniprot.org/uniprotkb/D7UQ40 evidence type DATABASE_ASSERTION retrieved on 2026-10-07 notes Current Swiss-Prot D7UQ40 entry53/sequence1, Alternaria solani/taxon48100, explicitly assigns prosolanapyrone III to (-)-solanapyrone A via RHEA31683 and left-to-right RHEA31684, with ChEBI63164/38229. This is a UniProt database assertion; cited experiments and ECO0000269 codes are not independently reinspected primary evidence here. The separate D-product reaction is not substituted. snippet subsequent Diels Alder cycloisomerization reference https://www.ncbi.nlm.nih.gov/protein/BAJ09785.1 evidence type DATABASE_ASSERTION retrieved on 2026-10-07 notes Complete independent GenPept sol5/oxidase-Diels-Alderase reference, 515aa, A.solani/taxon48100. No strain or isolate qualifier. Full coded_by splicing and source inspected; reference is not an identified historical assay stock or mature construct. reference https://www.ncbi.nlm.nih.gov/nuccore/AB514562.1 evidence type CURATOR_INFERENCE retrieved on 2026-10-07 notes Full1548-nt/table1 plus-strand CDS joins3092..3351,3404..3735, 3787..3939,3987..4520,4573..4841. Translation equals CDS annotation, independent BAJ09785.1 and current D7UQ40/all515aa. Independent coded_by DNA/exons and A.solani/taxon48100 match; no strain is invented. Genomic splicing is not an independent transcript assay.
prosolanapyrone III	is_uniprot_reported_substrate_of	UniProt-reported Sol5 A-product cycloisomerization	ChEBI63164 is the specific substrate cross-reference in UniProt's A-product reaction. This is the cycloisomerization half-reaction; the separate prosolanapyrone-II oxidation, upstream genes, order and cofactors are not adopted.	https://www.uniprot.org/uniprotkb/D7UQ40 reference https://www.uniprot.org/uniprotkb/D7UQ40 evidence type DATABASE_ASSERTION retrieved on 2026-10-07 notes Current Swiss-Prot D7UQ40 entry53/sequence1, Alternaria solani/taxon48100, explicitly assigns prosolanapyrone III to (-)-solanapyrone A via RHEA31683 and left-to-right RHEA31684, with ChEBI63164/38229. This is a UniProt database assertion; cited experiments and ECO0000269 codes are not independently reinspected primary evidence here. The separate D-product reaction is not substituted.
UniProt-reported Sol5 A-product cycloisomerization	has_uniprot_reported_product	solanapyrone A	Exact A product, not D full key AWQLNKJBXASXDU-IPJQOSJUSA-N. The D owner's existing graph, pathway and history stay unchanged. A.rabiei source producer/BGC grades and separate A.solani/other occurrences are preserved. No new producer, BGC linkage, phenotype or pathway finality is inferred.	https://www.uniprot.org/uniprotkb/D7UQ40 https://github.com/mite-standard/mite_data/blob/6eacd913b2036376031072f69cbb33908f132998/mite_data/data/MITE0000455.json reference https://www.uniprot.org/uniprotkb/D7UQ40 evidence type DATABASE_ASSERTION retrieved on 2026-10-07 notes Current Swiss-Prot D7UQ40 entry53/sequence1, Alternaria solani/taxon48100, explicitly assigns prosolanapyrone III to (-)-solanapyrone A via RHEA31683 and left-to-right RHEA31684, with ChEBI63164/38229. This is a UniProt database assertion; cited experiments and ECO0000269 codes are not independently reinspected primary evidence here. The separate D-product reaction is not substituted. reference https://github.com/mite-standard/mite_data/blob/6eacd913b2036376031072f69cbb33908f132998/mite_data/data/MITE0000455.json evidence type DATABASE_ASSERTION retrieved on 2026-10-07 notes MITE0000455v1 active encodes an oxidation/cycloaddition example whose product matches the A owner's full InChIKey AWQLNKJBXASXDU-SFDCBXKLSA-N and complete stereo in the retained repository-helper/RDKit2026.03.5 screen. Its top-level comment explicitly says functionality is unclear. Its knockout code remains database-level; the cited primary paper was inaccessible. The example is not independently verified primary catalysis.

Every edge carries its own citation; an uncited edge is refused by the corpus tests.

Explore across X-Mech

AntibioticMech (solanapyrone A) ↗ MediaIngredientMech (CHEBI:38229) ↗ TaxonMech: Ascochyta rabiei (NCBITaxon:5454) ↗ PathwayMech (mibig:BGC0002515) ↗

Provenance

Source concept	Source	Version
BGC0002515	MIBIG	2
CHEBI:38229	CHEBI	3-star

This page is generated from data/natural_products/polyketides/solanapyrone-a.yaml, which is generated from the committed inventories. Neither is edited by hand.