Ready Made Solution, 2.5 mg/mL in DMSO (2.74 mM), from Streptomyces hygroscopicus

23,27-Epoxy-3H-pyrido[2,1-c][1,4]oxaazacyclohentriacontine solution
Empirical Formula (Hill Notation):
Molecular Weight:
EC Number:

Quality Level

biological source

Streptomyces hygroscopicus

vapor pressure

0.56 hPa ( 20 °C)


0.2 μm filtered


≥95% (HPLC)



autoignition temp.

301 °C


2.5 mg/mL in DMSO (2.74 mM)


colorless to yellow

Mode of action

enzyme | inhibits

antibiotic activity spectrum




storage temp.


Biochem/physiol Actions

Rapamycin is a macrocyclic triene antibiotic possessing potent immunosuppressant and anticancer activity. It forms a complex with FKBP12 that binds to and inhibits the molecular target of rapamycin (mTOR). mTOR is a member of the phosphoinositide kinase-related kinase (PIKK) family that enhances cellular proliferation via the phosphoinositol 3-kinase/Akt signaling pathway. Inhibition of this pathway by rapamycin blocks downstream elements that result in cell cycle arrest in G1. The effectors of mTOR action include 4EBP1 and S6K1.

Features and Benefits

This compound is featured on the Phosphoinositide Kinases page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

This compound was developed by Pfizer. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.



Other Notes

Keep container tightly closed in a dry and well-ventilated place. Store under inert gas. Is Hygroscopic.
Rapamycin has been expertly reviewed and recommended by the Chemical Probes Portal. For more information, please visit the
Rapamycin probe summary on the Chemical Probes Portal website.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NA 1993 / PGIII

WGK Germany


Flash Point(F)

188.6 °F - closed cup

Flash Point(C)

87 °C - closed cup

Certificate of Analysis
Certificate of Origin
Yolanda T Chong et al.
Cell, 161(6), 1413-1424 (2015-06-06)
Proteomics has proved invaluable in generating large-scale quantitative data; however, the development of systems approaches for examining the proteome in vivo has lagged behind. To evaluate protein abundance and localization on a proteome scale, we exploited the yeast GFP-fusion collection...
Monique Bernard et al.
Autophagy, 10(12), 2193-2207 (2014-12-17)
Recent evidence suggests that autophagy may favor fibrosis through enhanced differentiation of fibroblasts in myofibroblasts. Here, we sought to characterize the mediators and signaling pathways implicated in autophagy-induced myofibroblast differentiation. Fibroblasts, serum starved for up to 4 d, showed increased...
Seokjo Kang et al.
Journal of Alzheimer's disease : JAD, 70(3), 667-680 (2019-07-01)
Increased levels of total tau (t-tau) and hyperphosphorylated tau (p-tau) proteins in the cerebrospinal fluid of Alzheimer's disease (AD) patients are well documented and strongly correlate with AD pathology. Recent studies have further shown that human tau can be released...
S Boridy et al.
Cell death & disease, 5, e1216-e1216 (2014-05-09)
Glioblastoma multiforme is a devastating disease of the central nervous system and, at present, no effective therapeutic interventions have been identified. Celastrol, a natural occurring triterpene, exhibits potent anti-tumor activity against gliomas in xenograft mouse models. In this study, we...
Sachin Kotak et al.
The EMBO journal, 33(16), 1815-1830 (2014-07-06)
The positioning and the elongation of the mitotic spindle must be carefully regulated. In human cells, the evolutionary conserved proteins LGN/Gαi1-3 anchor the coiled-coil protein NuMA and dynein to the cell cortex during metaphase, thus ensuring proper spindle positioning. The...
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