NaturalProductMech

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violacein

naturalproductmech:mibig-8538472b7e MINTED SEEDED

Grounding review: No 3-star ChEBI entry shares this structure, so the record keeps a content-hashed identifier.
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REVIEWED records curator sign-off on identity, structure, filing class and producer claims; DEPRECATED retains a superseded or out-of-scope record.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 InChIKeyXAPNKXIRQFHCHN-UHFFFAOYSA-N
SMILESOC1=CC2=C(NC=C2C2=CC(C(=O)N2)=C2C(=O)NC3=C2C=CC=C3)C=C1
Stereochemistryfully defined
Cross-referencesnpatlas:NPA015879, pubchem:9928039

Filing pathway

Alkaloids — 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 other, from MIBiG.

Producer organisms 0

None. The compound has a characterized gene cluster whose host NCBI does not name, which for an uncultured symbiont is the honest state — see the discussion below.

Occurrences 5

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.

TaxonSourceReference
Pseudoalteromonas tunicata
NCBITaxon:314281		 LOTUS DOI:10.3390/10101286
Chromobacterium violaceum
NCBITaxon:536		 LOTUS DOI:10.1007/S00253-011-3468-Z
Chromobacterium violaceum
NCBITaxon:536		 LOTUS DOI:10.1007/S12275-015-5173-6
Chromobacterium violaceum
NCBITaxon:536		 LOTUS DOI:10.1271/BBB.57.775
Escherichia coli
NCBITaxon:562		 LOTUS DOI:10.1021/OL0509585

Biosynthetic gene clusters 1

AccessionHostLocus evidenceGenome
mibig:BGC0000830 not named CLUSTER_UNSTATED genbank:AF367409.1

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.

Mechanism & Biosynthesis Overview

PRODUCERS & OCCURRENCE 0 producers (0 causal) 5 cited occurrences BIOSYNTHETIC LOCUS 1 gene cluster 0 curated pathway steps NATURAL PRODUCT violacein naturalproductmech:mibig-8538472b7e Alkaloids TARGETS & BIOACTIVITY 0 molecular targets 0 bioactivities · 0 graphs

Explore across X-Mech

AntibioticMech (violacein) ↗ MediaIngredientMech (naturalproductmech:mibig-8538472b7e) ↗ PathwayMech (mibig:BGC0000830) ↗

Open questions 1

unnamed-producer — No producer claim is written from BGC0000830, which gives NCBITaxon:77133 (uncultured bacterium — shared by every unplaced bacterium), because the taxon names no single organism. The cluster is kept: a characterized locus is an origin assertion whether or not its host has a name, and for a compound from an uncultured symbiont that is the honest state. Name the producer if the primary literature does.

Provenance

Source conceptSourceVersion
BGC0000830MIBIG5

This page is generated from data/natural_products/alkaloids/violacein-2.yaml, which is generated from the committed inventories. Neither is edited by hand.