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SML2952

Sigma-Aldrich

Tasisulam

≥98% (HPLC)

Synonym(s):

LY 573636, LY-573636, LY573636, N-(2,4-Dichlorobenzoyl)-5-bromothiophene-2-sulfonamide, N-(5-Bromothiophen-2-ylsulfonyl)-2,4-dichlorobenzamide, N-[(5-Bromo-2-thienyl)sulfonyl]-2,4-dichlorobenzamide

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About This Item

Empirical Formula (Hill Notation):
C11H6BrCl2NO3S2
CAS Number:
519055-62-0
Molecular Weight:
415.11
MDL number:
MFCD11973637
UNSPSC Code:
12352200
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

form

powder

color

white to beige

solubility

DMSO: 2 mg/mL, clear

storage temp.

2-8°C

InChI

1S/C11H6BrCl2NO3S2/c12-9-3-4-10(19-9)20(17,18)15-11(16)7-2-1-6(13)5-8(7)14/h1-5H,(H,15,16)

InChI key

WWONFUQGBVOKOF-UHFFFAOYSA-N

Biochem/physiol Actions

Tasisulam (LY573636) is a SPLAM (SPLicing inhibitor sulfonAMide) that bridges RNA binding motif protein 39 (RBM39; CAPERα, HCC1) and DCAF15 for interaction, thereby promoting (CUL4-DDB1-DDA1-DCAF15) E3 ubiquitin ligase complex-mediated RBM39 ubiquitination and subsequent proteasomal degradation. Tasisulam exerts selective toxicity in parental HCT116 cancer cultures (IC50 = 6.5 μM), but not those harboring non-CUL4-DCAF15-associating RBM39 G268V mutant even at a high concentration of 50 μM.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Ting Han et al.
Science (New York, N.Y.), 356(6336) (2017-03-18)
Indisulam is an aryl sulfonamide drug with selective anticancer activity. Its mechanism of action and the basis for its selectivity have so far been unknown. Here we show that indisulam promotes the recruitment of RBM39 (RNA binding motif protein 39)
Tyler B Faust et al.
Nature chemical biology, 16(1), 7-14 (2019-11-07)
The investigational drugs E7820, indisulam and tasisulam (aryl-sulfonamides) promote the degradation of the splicing factor RBM39 in a proteasome-dependent mechanism. While the activity critically depends on the cullin RING ligase substrate receptor DCAF15, the molecular details remain elusive. Here we
Tabitha C Ting et al.
Cell reports, 29(6), 1499-1510 (2019-11-07)
Indisulam and related sulfonamides recruit the splicing factor RBM39 to the CRL4-DCAF15 E3 ubiquitin ligase, resulting in RBM39 ubiquitination and degradation. Here, we used a combination of domain mapping and random mutagenesis to identify domains or residues that are necessary

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