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Cat.No. 2267 - Lactacystin | C15H24N2O7S | CAS No. 133343-34-7
Description: Cell-permeable, potent and selective proteasome inhibitor
Chemical Name: (2R,3S,4R)-3-Hydroxy-2-[(1S)-1-hydroxy-2-methylpropyl]-4-methyl-5-oxo-2-pyrrolidinecarboxy-N-acetyl-L-cysteine thioester
Citations (2)

Biological Activity

A cell-permeable, potent and selective proteasome inhibitor. A Streptomyces metabolite that is thought to bind irreversibly to the active site N-terminal threonine residue of the catalytic β-subunit of the 20S proteasome, thereby inhibiting its chymotrypsin and trypsin-like activities. Induces neurite outgrowth in Neuro 2a neuroblastoma cells and has been reported to induce apoptosis in human monoblast U937 cells. Also inhibits NF-κB activation (IC50 = 10 μM).

Technical Data

M. Wt 376.42
Formula C15H24N2O7S
Storage Desiccate at -20°C
CAS Number 133343-34-7
PubChem ID 6610292
Smiles O=C1N[C@]([C@@](SC[C@H](NC(C)=O)[C@](O)=O)=O)([C@H](C(C)C)O)[C@@H](O)[C@H]1C

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

All Tocris products are intended for laboratory research use only.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
water 3.76 10

Preparing Stock Solutions

The following data is based on the product molecular weight 376.42. Batch specific molecular weights may vary from batch to batch due to solvent of hydration, which will affect the solvent volumes required to prepare stock solutions.

Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 2.66 mL 13.28 mL 26.57 mL
5 mM 0.53 mL 2.66 mL 5.31 mL
10 mM 0.27 mL 1.33 mL 2.66 mL
50 mM 0.05 mL 0.27 mL 0.53 mL

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Product Datasheets

Certificate of Analysis / Product Datasheet
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Safety Datasheet


References are publications that support the products' biological activity.

Omura et al (1991) Lactacystin, a novel microbial metabolite, induces neuritogenesis of neuroblastoma cells. J.Antibiot. 44 113 PMID: 1848215

Fenteany et al (1995) Inhibition of proteasome activities and subunit-specific amino-terminal threonine modification by lactacystin. Science 268 726 PMID: 7732382

Bellas et al (1997) Inhibition of NF-κB activity induces apoptosis in murine hepatocytes. Am.J.Pathol. 151 891 PMID: 9327720

If you know of a relevant reference for Lactacystin, please let us know.

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View all Proteasome Inhibitors

Keywords: Lactacystin, supplier, Cell-permeable, potent, selective, proteasome, inhibitors, inhibits, Proteasome, Proteinases, Proteases, Proteasome, Proteasome, Tocris Bioscience

2 Citations for Lactacystin

Citations are publications that use Tocris products. Selected citations for Lactacystin include:

Wen et al (2015) FBG1 Is the Final Arbitrator of A1AT-Z Degradation. PLoS One 10 e0135591 PMID: 26295339

Ren et al (2013) A critical role for protein degradation in the nucleus accumbens core in cocaine reward memory. Neuropsychopharmacology 38 778 PMID: 23303053

Do you know of a great paper that uses Lactacystin from Tocris? If so please let us know.

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