Skip to Content
Merck
All Photos(1)

Documents

Safety Information

506106

Sigma-Aldrich

p21-Activated Kinase Inhibitor III, IPA-3

The p21-Activated Kinase Inhibitor III, IPA-3, also referenced under CAS 42521-82-4, controls the biological activity of p21-Activated Kinase. This small molecule/inhibitor is primarily used for Phosphorylation & Dephosphorylation applications.

Synonym(s):

p21-Activated Kinase Inhibitor III, IPA-3, 2,2ʹ-Dihydroxy-1,1ʹ-dinaphthyldisulfide, PAK Inhibitor III

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Empirical Formula (Hill Notation):
C20H14O2S2
CAS Number:
42521-82-4
Molecular Weight:
350.45
MDL number:
MFCD00388917
UNSPSC Code:
12352200
NACRES:
NA.77

Quality Level

100

Assay

≥97% (HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

yellow

solubility

DMSO: 10 mg/mL
ethanol: 2 mg/mL

shipped in

wet ice

storage temp.

−20°C

InChI

1S/C20H14O2S2/c21-17-11-9-13-5-1-3-7-15(13)19(17)23-24-20-16-8-4-2-6-14(16)10-12-18(20)22/h1-12,21-22H

InChI key

RFAXLXKIAKIUDT-UHFFFAOYSA-N

General description

A cell-permeable symmetrical disulfide allosteric inhibitor that selectively targets the autoregulatory domain of group I, but not group II, PAKs (p21-activated kinases) and prevents the activation of PAK1/2/3 (% inhibition= 95, 70, and 60, respectively, with 10 µM inhibitor; IC50 = 2.5 µM for PAK1). Specificity test shows ≥ 50% inhibition, in the presence of 10 µM ATP and inhibitor, against 9 of 214 non-PAK human kinases. Shown to effectively suppress both basal and PDGF-induced PAK activation at 30 µM in mouse embryonic fibroblasts. IPA-3 does not inhibit the enzymatic activity of preactivated PAKs and reduction of the intramolecular disulfide bond of IPA-3 by DTT renders it inactive.

Packaging

Packaged under inert gas

Warning

Toxicity: Irritant (B)

Other Notes

Deacon, S.W., et al. 2008. Chem. Biol.15, 322.

Legal Information

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

Pictograms

CorrosionEnvironment
GHS05,GHS09

Signal Word

Danger

Hazard Statements

H318,H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

506106-VMG:
506106-5SMG:
506106-1.1ML:
506106-25MG:
506106-5MG:

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’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Abinaya Raghavan et al.
iScience, 27(8), 110565-110565 (2024-08-26)
Astroglia play crucial neuroprotective roles by internalizing pathogenic aggregates and facilitating their degradation. Here, we show that α-SYN protofibril-induced organelle toxicities and reactive oxygen species (ROS) cause premature cellular senescence in astrocytes and astrocyte-derived cancer cells, resulting in a transient

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service