CAS No. 1405-97-6

Batch: Purity:99.94
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Gramicidin Chemical Structure
Chemical Structure
Check the Gramicidin product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name (2R)-2-[[2-[[(2S)-2-formamido-3-methylbutanoyl]amino]acetyl]amino]-N-[(2S)-1-[[(2R)-1-[[(2S)-1-[[(2R)-1-[[(2S)-1-[[(2R)-1-[[(2S)-1-[[(2R)-1-[[(2S)-1-[[(2R)-1-[[(2S)-1-(2-hydroxyethylamino)-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-1-oxopropan-2-yl]-4-methylpentanamide
CAS Number 1405-97-6
Molecular Formula
Molecular Weight (MW) 1882.29
InChIKey NDAYQJDHGXTBJL-MWWSRJDJSA-N

Ordering Information

Biological Activity

Gramicidin is an antimicrobial peptide isolated from Bacillus aneurinolyticus (Bacillus brevis) that acts as a transmembrane ion channel former. It inserts into lipid membranes to assemble cation-selective channels, significantly increasing cell wall permeability to monovalent cations. This ion gradient disruption destabilizes bacterial membrane potential, triggers hydroxyl radical generation, and leads to water influx, bacterial flattening, and cell lysis in gram-positive bacteria.[1][2]

How to Prepare Stock Solution?

Concentration Volume Mass
1 mg 5 mg 10 mg
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 100 mg/mL (53.12 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 20 mg/mL
Water Insoluble
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.