Tubacin

Modify Date: 2024-01-09 09:10:20

Tubacin structure	Common Name	Tubacin
	CAS Number	537049-40-4	Molecular Weight	721.861
	Density	1.3±0.1 g/cm3	Boiling Point	N/A
	Molecular Formula	C₄₁H₄₃N₃O₇S	Melting Point	N/A
	MSDS	USA	Flash Point	N/A

Use of Tubacin

Tubacin is a potent and selective inhibitor of HDAC6, with an IC50 value of 4 nM and approximately 350-fold selectivity over HDAC1.

Name	Octanediamide, N1-[4-[(2R,4R,6S)-4-[[(4,5-diphenyl-2-oxazolyl)thio]methyl]-6-[4-(hydroxymethyl)phenyl]-1,3-dioxan-2-yl]phenyl]-N8-hydroxy-, rel
Synonym	More Synonyms

Description	Tubacin is a potent and selective inhibitor of HDAC6, with an IC50 value of 4 nM and approximately 350-fold selectivity over HDAC1.
Related Catalog	Signaling Pathways >> Cell Cycle/DNA Damage >> HDAC Signaling Pathways >> Epigenetics >> HDAC Research Areas >> Cancer
Target	HDAC6:4 nM (IC50) HDAC3:1.27 μM (IC50) HDAC8:1.27 μM (IC50) HDAC1:1.40 μM (IC50) HDAC5:3.35 μM (IC50) HDAC10:3.71 μM (IC50) HDAC11:3.79 μM (IC50) HDAC9:4.31 μM (IC50) HDAC2:6.27 μM (IC50) HDAC7:9.70 μM (IC50) HDAC4:17.30 μM (IC50)
In Vitro	Tubacin preferentially induces α-tubulin hyperacetylation at a concentration of 2.5 µM, and induces α-tubulin acetylation at 5 µM and protects prostate cancer (LNCaP) cells from hydrogen peroxide-induced death at 8 µM via peroxiredoxin acetylation[1]. Tubacin (2.5 and 5 μM) specifically induces acetylation of α-tubulin in MM cells. Tubacin significantly inhibits both drug-sensitive and drug-resistant MM cell growth, with IC50 5-20 μM at 72 h. Tubacin also induces apoptosis by activation of caspases. Moreover, Tubacin inhibits binding of HDAC6 with dynein, and it induces significant accumulation of polyubiquitinated proteins, when combined with bortezomib. Tubacin and bortezomib induce synergistic antitumor activity in MM cell lines, and inhibits paracrine MM Cell Growth. Tubacin (5 μM) synergistically enhances bortezomib-induced cytotoxicity in patient MM cells without cytotoxicity to PBMCs[2]. Tubacin can concentration-dependently inhibits JEV-induced cytopathic effect and apoptosis, as well as reduces virus yield in human cerebellar medulloblastoma cells. The IC50 of virus yield is 0.26 μM for Tubacin. Tubacin also meaningfully blocks the production of intracellular infectious virus particles, with an IC50 of 1.52 μM. Tubacin induces the hyperacetylation of a HDAC6 substrate Hsp90 and reduces the interaction of Hsp90 with JEV NS5 protein[3].
Cell Assay	HDAC inhibitors TSA, VPA, tubacin, and TBSA are used in the assay. Cytotoxicity of HDACi to TE671 and BHK-21 cells is evaluated by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. 5 × 104 cells per well are seeded in 96-well plates and then treated with the indicated concentration of each HDACi. After 48-h of treatment, 25 μL of MTT solution (5 mg/mL) is added to each well and incubated at 37 °C with 5% CO2 for 3 h. After three washings with phosphate buffer saline (PBS), 100 μL DMSO is added into each well for dissolving formazan crystals. OD570−630 is measured by micro-ELISA reader and survival rate are calculated to indicate suppressive effects of each HDACi on the survival of TE671 and BHK-21 cells. Survival rate (%) = ((Acontrol − Aexperiment)/Acontrol) × 100%. 50% cytotoxic concentration (CC50) values are calculated by computer program[3].
References	[1]. Butler KV, et al. Rational design and simple chemistry yield a superior, neuroprotective HDAC6 inhibitor, tubastatin A. J Am Chem Soc. 2010 Aug 11;132(31):10842-6. [2]. Hideshima T, et al. Small-molecule inhibition of proteasome and aggresome function induces synergistic antitumor activity in multiple myeloma. Proc Natl Acad Sci U S A. 2005 Jun 14;102(24):8567-72. Epub 2005 Jun 3. [3]. Lu CY, et al. Tubacin, an HDAC6 Selective Inhibitor, Reduces the Replication of the Japanese Encephalitis Virus via the Decrease of Viral RNA Synthesis. Int J Mol Sci. 2017 May 1;18(5).

Density	1.3±0.1 g/cm3
Molecular Formula	C₄₁H₄₃N₃O₇S
Molecular Weight	721.861
Exact Mass	721.282166
PSA	168.45000
LogP	5.82
Appearance of Characters	white to tan
Index of Refraction	1.668
Storage condition	?20°C
Water Solubility	DMSO: ≥10mg/mL

RIDADR	NONH for all modes of transport

SMAR1 coordinates HDAC6-induced deacetylation of Ku70 and dictates cell fate upon irradiation.

Cell Death Dis. 5 , e1447, (2014)

Acetylation status of DNA end joining protein Ku70 dictates its function in DNA repair and Bax-mediated apoptosis. Despite the knowledge of HDACs and HATs that are reported to modulate the acetylation...

Limited efficacy of specific HDAC6 inhibition in urothelial cancer cells.

Cancer Biol. Ther. 15(6) , 742-57, (2014)

Epigenetic modifiers such as histone deacetylases (HDACs) have come into focus as novel drug targets for cancer therapy due to their functional role in tumor progression. Since common pan-HDAC inhibit...

Syntheses and discovery of a novel class of cinnamic hydroxamates as histone deacetylase inhibitors by multimodality molecular imaging in living subjects.

Cancer Res. 74(24) , 7475-86, (2014)

Histone deacetylases (HDAC) that regulate gene expression are being explored as cancer therapeutic targets. In this study, we focused on HDAC6 based on its ability to inhibit cancerous Hsp90 chaperone...

UNII:02C2G1D30D

Octanediamide, N-[4-[(2R,4R,6S)-4-[[(4,5-diphenyl-2-oxazolyl)thio]methyl]-6-[4-(hydroxymethyl)phenyl]-1,3-dioxan-2-yl]phenyl]-N-hydroxy-

N-(4-{(2R,4R,6S)-4-{[(4,5-Diphenyl-1,3-oxazol-2-yl)sulfanyl]methyl}-6-[4-(hydroxymethyl)phenyl]-1,3-dioxan-2-yl}phenyl)-N'-hydroxyoctanediamide