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Sigma-Aldrich

TGF-β RI Kinase Inhibitor VI, SB431542

TGF-β RI Kinase Inhibitor VI, SB431542, CAS 301836-41-9, is a cell-permeable inhibitor of SMAD2 phosphorylation. Inhibits the activity of ALK4 and ALK5 (IC₅₀ = 140 nM and 94 nM, respectively).

Synonym(s):

TGF-β RI Kinase Inhibitor VI, SB431542, 4-[4-(3,4-Methylenedioxyphenyl)-5-(2-pyridyl)-1H-imidazol-2-yl]benzamide, Dihydrate, 4-[4-(1,3-Benzodioxol-5-yl)-5-(2-pyridyl)-1H-imidazol-2-yl]benzamide, Dihydrate, SB-431542

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About This Item

CAS Number:
301836-41-9
UNSPSC Code:
51111800
NACRES:
NA.77

Quality Level

300

Assay

≥97% (HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

off-white

solubility

ethanol: 10 mg/mL
DMSO: 100 mg/mL

shipped in

ambient

storage temp.

2-8°C

InChI

1S/C22H16N4O3/c23-21(27)13-4-6-14(7-5-13)22-25-19(20(26-22)16-3-1-2-10-24-16)15-8-9-17-18(11-15)29-12-28-17/h1-11H,12H2,(H2,23,27)(H,25,26)

InChI key

FHYUGAJXYORMHI-UHFFFAOYSA-N

General description

A cell-permeable triarylimidazole compound that is shown to effectively inhibit cellular Smad2 phosphorylation (>90% inhibition by 10 µM inhibitor) upon vector-mediated expression of constitutively active ALK4, ALK5, or ALK7 in NIH 3T3 cells, while exhibiting little effect against Smad1 phosphorylation by other members of type I receptors for TGF-β in NIH 3T3 cultures expressing active ALK1, 2, 3, or 6. When tested directly in cell-free kinase assays, SB431542 is demonstrated to potently inhibit the activity of ALK4 and ALK5 (IC50 = 140 nM and 94 nM, respectively) with no or much reduced potency toward a panel of 24 other kinases (IC50 ≥10 µM in the presence of 10 µM ATP), including ALK2 and ALK6. Reported to improve the efficiency of 4-TF-induced human iPSCs generation from fibroblast cultures by >200-fold when used together with PD0325901 (Cat. No. 444966) and Thiazovivin (Cat. No. 420220).

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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