malacidin B
CHEBI:140174 EXACT SEEDED antibacterial
A homodetic cyclic peptide that is malacidin A in which the (2E,4Z)-8-methylnona-2,4-dienoyl group has been replaced by a (2E,4Z)-8-methyldeca-2,4-dienoyl group.
Structure
| Standard InChIKey | SMTCDPMWINUUKC-AVBBYWJWSA-N |
|---|---|
| SMILES | CCC(C)CC/C=C\C=C\C(=O)N[C@@H](C(C)C(=O)O)C(=O)N[C@H]1C(NC(=O)[C@@H]2C[C@H](CN2C(=O)[C@@H](NC(=O)[C@H](NC(=O)CNC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@H](NC1=O)C(C)C)CCCCN)C(C(=O)O)O)CC(=O)O)C(C)C(=O)O)C(C)C)C)C |
| Stereochemistry | undefined stereocentres — the InChIKey does not distinguish this compound from its stereoisomers |
| Cross-references | pubchem:132282519 |
Filing pathway
Amino acids and peptides — 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 nrps, 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 0
None cited.
Biosynthetic gene clusters 1
| Accession | Host | Locus evidence | Genome |
|---|---|---|---|
| mibig:BGC0001448 | not named | CLUSTER_DEMONSTRATED | genbank:KY654519.1 |
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.
Elsewhere in the fleet
- AntibioticMech — CHEBI:140174 (same structure, same inchikey)
Open questions 1
unnamed-producer — No producer claim is written from BGC0001448, 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 concept | Source | Version |
|---|---|---|
| BGC0001448 | MIBIG | 5 |
| CHEBI:140174 | CHEBI | 3-star |
This page is generated from data/natural_products/amino_acids_and_peptides/malacidin-b.yaml, which is generated from the committed inventories. Neither is edited by hand.