PeptideDB

TST-A 1426953-21-0

TST-A 1426953-21-0

CAS No.: 1426953-21-0

TST-A has an IC50 of 650 nM, making it an extremely potent inhibitor of eukaryotic RNA splicing. Thailanstatin A exhibit
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TST-A has an IC50 of 650 nM, making it an extremely potent inhibitor of eukaryotic RNA splicing. Thailanstatin A exhibits low-nM to sub-nM IC50s against a variety of cancer cell lines and works by non-covalently binding to the SF3b subunit of the U2 snRNA subcomplex of the spliceosome. When the ADC payload, thailanstatin A, is conjugated to the lysines on trastuzumab, "linker-less" ADC is produced.

Physicochemical Properties


Molecular Formula C28H41NO9
Molecular Weight 535.6264
Exact Mass 535.28
Elemental Analysis C, 62.79; H, 7.72; N, 2.62; O, 26.88
CAS # 1426953-21-0
PubChem CID 71665768
Appearance White to off-white solid powder
LogP 1.9
Hydrogen Bond Donor Count 3
Hydrogen Bond Acceptor Count 9
Rotatable Bond Count 11
Heavy Atom Count 38
Complexity 960
Defined Atom Stereocenter Count 9
SMILES

C[C@H]1C[C@H]([C@H](O[C@H]1C/C=C(\C)/C=C/[C@@H]2[C@H]([C@@]3(C[C@H](O2)CC(=O)O)CO3)O)C)NC(=O)/C=C\[C@H](C)OC(=O)C

InChi Key GJKQDOMCDFJANR-FUDLAKRJSA-N
InChi Code

InChI=1S/C28H41NO9/c1-16(7-10-24-27(34)28(15-35-28)14-21(38-24)13-26(32)33)6-9-23-17(2)12-22(19(4)37-23)29-25(31)11-8-18(3)36-20(5)30/h6-8,10-11,17-19,21-24,27,34H,9,12-15H2,1-5H3,(H,29,31)(H,32,33)/b10-7+,11-8-,16-6+/t17-,18-,19+,21+,22+,23-,24+,27+,28+/m0/s1
Chemical Name

2-[(3R,4R,5R,7S)-5-[(1E,3E)-5-[(2S,3S,5R,6R)-5-[[(Z,4S)-4-acetyloxypent-2-enoyl]amino]-3,6-dimethyloxan-2-yl]-3-methylpenta-1,3-dienyl]-4-hydroxy-1,6-dioxaspiro[2.5]octan-7-yl]acetic acid
Synonyms

Thailanstatin A, TST-A;
HS Tariff Code 2934.99.9001
Storage

Powder-20°C 3 years

4°C 2 years

In solvent -80°C 6 months

-20°C 1 month

Shipping Condition Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity


ln Vitro The natural product Thailanstatin A (TST-A) is a strong antiproliferative that is derived from Burkholderia thailandensis MSMB43[2]. With GI50s in the single nM range (1.11-2.69 nM), thailanstatin A (DU-145, NCI-H232A, MDA-MB-231, and SKOV-3 cells) demonstrates strong antiproliferative activities[3].
References

[1]. Natural Product Splicing Inhibitors: A New Class of Antibody-Drug Conjugate (ADC) Payloads. Bioconjug Chem. 2016;27(8):1880-1888.

[2]. Enantioselective Synthesis of Thailanstatin A Methyl Ester and Evaluation of in Vitro Splicing Inhibition. J Org Chem. 2018;83(9):5187-5198.

[3]. Genomics-guided discovery of thailanstatins A, B, and C As pre-mRNA splicing inhibitors and antiproliferative agents from Burkholderia thailandensis MSMB43. J Nat Prod. 2013;76(4):685-693.

Additional Infomation Thailanstatin A is a C-glycosyl compound.
Thailanstatin A has been reported in Burkholderia thailandensis with data available.

Solubility Data


Solubility (In Vitro) DMSO : ~250 mg/mL (~466.74 mM)
Solubility (In Vivo) Solubility in Formulation 1: ≥ 2.08 mg/mL (3.88 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

Solubility in Formulation 2: ≥ 2.08 mg/mL (3.88 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.8670 mL 9.3348 mL 18.6696 mL
5 mM 0.3734 mL 1.8670 mL 3.7339 mL
10 mM 0.1867 mL 0.9335 mL 1.8670 mL
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.