bleomycin B2

antibioticmech:aro-e05426a76f ·ANTIBACTERIAL ·MINTED SEEDED

Bleomycin B2 is a glycopeptide antibiotic produced by Streptomyces verticillus taken as a mixture of bleomycins. It induces stand breaks in bacterial nucleic acids. — PMID:15700963

Machine-generated and unreviewed. Identity, structure and cross-references come straight from ChEBI's and CARD's own data; no curator has signed off on this record yet.

Classification

glycopeptide antibioticARO:3000081

Strictly broader compounds or drug classes this molecule belongs to.

glycopeptide antibiotic ARO:3000081

Chemical structure

Computed structure properties
Molecular formula	C55H84N20O21S2
Charge	0
Average mass	1425.5 Da
Monoisotopic mass	1424.55613212 Da
Source	PubChem · retrieved 2026-08-29
InChIKey	NBLHOLNNKJBEDC-XOGQCRKLSA-N

SMILES

CC1=C(N=C(N=C1N)[C@H](CC(=O)N)NC[C@@H](C(=O)N)N)C(=O)N[C@@H]([C@H](C2=CN=CN2)O[C@H]3[C@H]([C@H]([C@@H]([C@@H](O3)CO)O)O)O[C@@H]4[C@H]([C@H]([C@@H]([C@H](O4)CO)O)OC(=O)N)O)C(=O)N[C@H](C)[C@H]([C@H](C)C(=O)N[C@@H]([C@@H](C)O)C(=O)NCCC5=NC(=CS5)C6=NC(=CS6)C(=O)NCCCCN=C(N)N)O

InChI

InChI=1S/C55H84N20O21S2/c1-19-32(72-45(75-43(19)58)24(11-30(57)79)67-12-23(56)44(59)85)49(89)74-34(40(25-13-63-18-68-25)94-53-42(38(83)36(81)28(14-76)93-53)95-52-39(84)41(96-55(62)91)37(82)29(15-77)92-52)50(90)69-21(3)35(80)20(2)46(86)73-33(22(4)78)48(88)65-10-7-31-70-27(17-97-31)51-71-26(16-98-51)47(87)64-8-5-6-9-66-54(60)61/h13,16-18,20-24,28-29,33-42,52-53,67,76-78,80-84H,5-12,14-15,56H2,1-4H3,(H2,57,79)(H2,59,85)(H2,62,91)(H,63,68)(H,64,87)(H,65,88)(H,69,90)(H,73,86)(H,74,89)(H2,58,72,75)(H4,60,61,66)/t20-,21+,22+,23-,24-,28-,29+,33-,34-,35-,36+,37+,38-,39-,40-,41-,42-,52+,53-/m0/s1

Cross-references

Identifiers for this same structure in other resources. An accession that lands on two different structures in this corpus is withheld from both rather than shown here, since it names at most one of them.

bleomycin B2ARO:3000692
pubchem.compound:5496540

Source concepts

Every upstream concept that resolved to this record. The merge is the product: this is what shows ChEBI and CARD are describing the same structure.

Upstream concepts merged into this record
Source	Native ID	Label	Minted CURIE	Version
ARO	`ARO:3000692`	bleomycin B2	`antibioticmech:aro-e05426a76f`	2026-08-30

Molecular targets

The molecular entity or process this compound acts on. Each target carries evidence — this is a mechanistic claim, not a classification.

deoxyribonucleic acid NUCLEIC_ACID ATTACKED_COMPONENT

ARO:3000738

CARD/ARO database assertion; target organism, strain, and assay are not specified. ARO describes DNA strand damage or transcription interference. Evidence status: DATABASE_ASSERTION_ONLY. Source: CARD_ARO 2026-08-30 (retrieved 2026-08-30).

ARO:3000738 (CARD/ARO asserts targeted_by_antibiotic ARO:3000692 (bleomycin B2); database assertion, not a primary citation.)

ribonucleic acid NUCLEIC_ACID ATTACKED_COMPONENT

ARO:3000740

CARD/ARO database assertion; target organism, strain, and assay are not specified. ARO describes RNA strand damage across multiple RNA types. Evidence status: DATABASE_ASSERTION_ONLY. Source: CARD_ARO 2026-08-30 (retrieved 2026-08-30).

ARO:3000740 (CARD/ARO asserts targeted_by_antibiotic ARO:3000692 (bleomycin B2); database assertion, not a primary citation.)

Resistance mechanisms

1 source-backed resistance determinants or associations, with ARO grounding where reported. Grouped by reported mechanism type.

ANTIBIOTIC_INACTIVATION 1

ANTIBIOTIC_INACTIVATION
Determinant	ARO ID	Organism	Gene families	Evidence
BRP(MBL)	ARO:3001205	not organism-specific	—	ARO:3001205 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000692 (bleomycin B2); database assertion, not a primary citation.)

Producer organisms

Organisms that biosynthesize this compound. Cluster link evidence is how the upstream source graded the gene cluster, so it is populated only for a source that grades it. An empty cell is not weaker support: a curator-authored producer carries its support in Evidence instead. Where the source entry named several compounds, the evidence is marked inherited, meaning it covers this compound together with the cluster's other products rather than singling it out. Those products need not be related to each other: a cluster can list an intermediate, a precursor and a finished antibiotic side by side.

Producer organisms
Organism	BGC	Cluster link evidence	Source	Quality	Note	Evidence
Streptomyces mobaraensis NCBITaxon:1223523 strain NBRC 13819 = DSM 40847	BGC0002350	Knock-out studies cluster inherited	MIBIG 4.0.1 (entry 2)	questionable	MIBiG active entry; compound 'bleomycin B2' joined by exact Standard InChIKey.	PMID:28256838 (MIBiG's first legacy reference for the entry, inherited rather than attached to the compound. It supports that the entry exists; it is NOT established as evidence for this specific producer/compound link.)

Curation history

SEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Seeded from data/raw/ inventories (ARO)
RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-08-31 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-09-08 · seed_from_sources
Re-seeded from updated data/raw/ inventories
RESEEDED_FROM_SOURCES 2026-09-08 · seed_from_sources
Re-seeded from updated data/raw/ inventories

Provenance

Seeded by scripts/seed_from_sources.py from the committed inventories in data/raw/. View the record (YAML).

Explore across X-Mech: MediaIngredientMech (bleomycin B2) · CultureMech · NaturalProductMech · PathwayMech · TraitMech · TaxonMech (Streptomyces mobaraensis)