AntibioticMech

G418

antibioticmech:aro-9047378d43 ·ANTIBACTERIAL ·MINTED SEEDED

A gentamicin class aminoglycoside antibiotic often used in mammalian cell culture work as a selectable marker for the neo cassette (APH3'). — PMID:4007271

Classification

aminoglycoside antibioticARO:0000016

Strictly broader compounds or drug classes this molecule belongs to.

• ARO:0000016 ARO:0000016

Chemical structure

Computed structure properties

Molecular formula	C20H40N4O10
Charge	0
Average mass	496.6 Da
Monoisotopic mass	496.27444349 Da
Source	PubChem · retrieved 2026-08-29
InChIKey	BRZYSWJRSDMWLG-DJWUNRQOSA-N

SMILES

C[C@H]([C@@H]1[C@H]([C@@H]([C@H]([C@H](O1)O[C@@H]2[C@H](C[C@H]([C@@H]([C@H]2O)O[C@@H]3[C@@H]([C@H]([C@@](CO3)(C)O)NC)O)N)N)N)O)O)O

InChI

InChI=1S/C20H40N4O10/c1-6(25)14-11(27)10(26)9(23)18(32-14)33-15-7(21)4-8(22)16(12(15)28)34-19-13(29)17(24-3)20(2,30)5-31-19/h6-19,24-30H,4-5,21-23H2,1-3H3/t6-,7+,8-,9-,10-,11+,12+,13-,14-,15-,16+,17-,18-,19-,20+/m1/s1

Also called

• geneticin (EXACT_SYNONYM)— aro

Cross-references

Equivalent identifiers for this same structure in other resources.

• ARO:3000653
• pubchem.compound:123865

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:3000653	G418	antibioticmech:aro-9047378d43	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.

antibiotic sensitive 16S rRNA NUCLEIC_ACID DIRECT_BINDING_TARGET

ARO:3000755

CARD/ARO database assertion; target organism, strain, and assay are not specified. 16S rRNA is asserted as the target. Evidence status: PRIMARY_EVIDENCE_NEEDED. Source: CARD_ARO 2026-08-30 (retrieved 2026-08-30).

• ARO:3000755 (CARD/ARO asserts targeted_by_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)

Resistance mechanisms

6 known routes by which microbes resist this compound, grounded in ARO where CARD models them. Grouped by mechanism type — expand a group to see its determinants.

ANTIBIOTIC_TARGET_ALTERATION 6

ANTIBIOTIC_TARGET_ALTERATION

Determinant	ARO ID	Organism	Gene families	Evidence
Escherichia coli 16S rRNA (rrsB) mutation conferring resistance to G418	ARO:3003397	not organism-specific	—	ARO:3003397 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)
armA	ARO:3000858	not organism-specific	—	ARO:3000858 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)
rmtA	ARO:3000859	not organism-specific	—	ARO:3000859 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)
rmtB	ARO:3000860	not organism-specific	—	ARO:3000860 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)
rmtC	ARO:3000861	not organism-specific	—	ARO:3000861 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)
sgm	ARO:3000862	not organism-specific	—	ARO:3000862 (CARD/ARO asserts confers_resistance_to_antibiotic ARO:3000653 (G418); database assertion, not a primary citation.)

Curation history

1. SEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources

   Seeded from data/raw/ inventories (ARO)

2. RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources

   Re-seeded from updated data/raw/ inventories

3. RESEEDED_FROM_SOURCES 2026-08-30 · seed_from_sources

   Re-seeded from updated data/raw/ inventories

4. RESEEDED_FROM_SOURCES 2026-08-31 · 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.