Date published: 2026-4-24

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CR8, (S)-Isomer (CAS 1084893-56-0)

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Alternate Names:
(2S)-2-[[9-propan-2-yl-6-[(4-pyridin-2-ylphenyl)methylamino]purin-2-yl]amino]butan-1-ol
Application:
CR8, (S)-Isomer is a cell-permeable (R)-DRF053 analog
CAS Number:
1084893-56-0
Purity:
≥97%
Molecular Weight:
431.5
Molecular Formula:
C24H29N7O
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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CR8, specifically the (S)-isomer, is a selective and potent inhibitor of cyclin-dependent kinases (CDKs), key enzymes involved in regulating the cell cycle, transcription, and neuronal functions. CR8 inhibits several CDKs, particularly CDK1, CDK2, CDK5, and CDK9, by competing with ATP for binding to the ATP-binding pocket of these kinases, thus blocking their catalytic activity. This inhibition broadly impacts cellular processes, especially in terms of cell cycle control. By blocking CDK1 and CDK2, CR8 can induce cell cycle arrest, making it an excellent tool for studies focused on cell cycle dynamics and its regulatory mechanisms. Additionally, the inhibition of CDK5, which plays crucial roles in neuronal functions, allows researchers to explore its involvement in neural development and synaptic function. In research settings, CR8 is employed to examine the effects of CDK inhibition in various cellular contexts. It is particularly useful for understanding how cellular proliferation and growth can be modulated at a molecular level. Also, by affecting CDK5, CR8 has been used in investigations related to neuron function, aiding in the exploration of molecular pathways that underpin neural activity and connectivity. This contributes to broader insights into the complex mechanisms regulating cellular and neuronal behavior.


CR8, (S)-Isomer (CAS 1084893-56-0) References

  1. CR8, a potent and selective, roscovitine-derived inhibitor of cyclin-dependent kinases.  |  Bettayeb, K., et al. 2008. Oncogene. 27: 5797-807. PMID: 18574471
  2. Spinal cord injury causes brain inflammation associated with cognitive and affective changes: role of cell cycle pathways.  |  Wu, J., et al. 2014. J Neurosci. 34: 10989-1006. PMID: 25122899
  3. A coleopteran cadherin fragment synergizes toxicity of Bacillus thuringiensis toxins Cry3Aa, Cry3Bb, and Cry8Ca against lesser mealworm, Alphitobius diaperinus (Coleoptera: Tenebrionidae).  |  Park, Y., et al. 2014. J Invertebr Pathol. 123: 1-5. PMID: 25218400
  4. Antitumoral effects of cyclin-dependent kinases inhibitors CR8 and MR4 on chronic myeloid leukemia cell lines.  |  Troadec, S., et al. 2015. J Biomed Sci. 22: 57. PMID: 26184865
  5. Studies of a Large Odd-Numbered Odd-Electron Metal Ring: Inelastic Neutron Scattering and Muon Spin Relaxation Spectroscopy of Cr8 Mn.  |  Baker, ML., et al. 2016. Chemistry. 22: 1779-88. PMID: 26748964
  6. BS69/ZMYND11 C-Terminal Domains Bind and Inhibit EBNA2.  |  Harter, MR., et al. 2016. PLoS Pathog. 12: e1005414. PMID: 26845565
  7. 5-Substituted 3-isopropyl-7-[4-(2-pyridyl)benzyl]amino-1(2)H-pyrazolo[4,3-d]pyrimidines with anti-proliferative activity as potent and selective inhibitors of cyclin-dependent kinases.  |  Vymětalová, L., et al. 2016. Eur J Med Chem. 110: 291-301. PMID: 26851505
  8. E2F1-CDK1 pathway activation in kanamycin-induced spiral ganglion cell apoptosis and the protective effect of CR8.  |  Liu, YY., et al. 2016. Neurosci Lett. 617: 247-53. PMID: 26905670
  9. Reduction of ciliary length through pharmacologic or genetic inhibition of CDK5 attenuates polycystic kidney disease in a model of nephronophthisis.  |  Husson, H., et al. 2016. Hum Mol Genet. 25: 2245-2255. PMID: 27053712
  10. Crystal structure of SPSB2 in complex with a rational designed RGD-containing cyclic peptide inhibitor of SPSB2-iNOS interaction.  |  You, T., et al. 2017. Biochem Biophys Res Commun. 489: 346-352. PMID: 28549582

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

CR8, (S)-Isomer, 5 mg

sc-311307
5 mg
$201.00