3D model (JSmol)
|Molar mass||376.42 g·mol−1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Lactacystin is an organic compound naturally synthesized by bacteria of the genus Streptomyces first described in 1991. The first total synthesis of lactacystin was developed by Elias Corey and Gregory Reichard in 1992. Lactacystin binds and inhibits specific catalytic subunits of the proteasome, a protein complex responsible for the bulk of proteolysis in the cell, as well as proteolytic activation of certain protein substrates. It was the first non-peptidic proteasome inhibitor discovered and is widely used as a research tool in biochemistry and cell biology. It covalently modifies the amino-terminal threonine of specific catalytic subunits of the proteasome, a discovery helped to establish the proteasome as a mechanistically novel class of protease: an amino-terminal threonine protease. The molecule is most commonly used as in biochemistry and cell biology laboratories as a selective inhibitor of the proteasome. The molecule is a lactam, or cyclic amide. A number of syntheses of this molecule have been published and there are more than 1,500 citations for lactacystin in PubMed as of 2013.
- Omura S, Fujimoto T, Otoguro K, Matsuzaki K, Moriguchi R, Tanaka H, Sasaki Y. (1991). Lactacystin, a novel microbial metabolite, induces neuritogenesis of neuroblastoma cells: S. Omura, et al. J. Antibiot. 44(1):113-6.
- "Total Synthesis of Lactacystin" Corey, E. J.; Reichard, G. A. J. Am. Chem. Soc. 1992, 114, 10677.
- Fenteany G, Standaert RF, Lane WS, Choi S, Corey EJ, Schreiber SL (1995). "Inhibition of proteasome activities and subunit-specific amino-terminal threonine modification by lactacystin". Science. 268 (5211): 726–31. doi:10.1126/science.7732382. PMID 7732382.
- Orlowski RZ. (1999). The role of the ubiquitin-proteasome pathway in apoptosis. Cell Death Differ 6: 303-313.