ChemicalBook > CAS DataBase List > IPA-3

IPA-3

Product Name: IPA-3
CAS No.: 42521-82-4
Chemical Name: IPA-3
Synonyms: IPA 3;IPA 3;IPA3;IPA-3, 10 mM in DMSO;1'-Dithiodi-2-naphthtol;1,1'-Dithiodi-2-naphthtol;2-Naphthalenol, 1,1'-dithiobis-;Bis(2-hydroxy-1-naphthyl) disulfide;1,1′-Disulfanediyldinaphthalen-2-ol;1,1'-Dithiodi-2-naphthtol USP/EP/BP;1,1'-Disulfanediylbis(naphthalen-2-ol)
CBNumber: CB02518903
Molecular Formula: C20H14O2S2
Formula Weight: 350.45
MOL File: 42521-82-4.mol

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IPA-3 Property

Melting point:: 172℃
Boiling point:: 543.7±35.0 °C(Predicted)
Density: 1.46±0.1 g/cm3(Predicted)
storage temp.: 2-8°C
solubility: DMSO: >20mg/mL
pka: 7.52±0.50(Predicted)
form: Yellow solid
color: off-white to yellow
Water Solubility: Soluble in DMSO or ethanol. Insoluble in water.
Sensitive: Light Sensitive
Stability:: Stable for 1 year from date of purchase as supplied. Solutions in DMSO may be stored at -20°C for up to 3 months.
CAS DataBase Reference: 42521-82-4

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Safety

Hazard Codes: Xi,N
Risk Statements: 41-50/53
Safety Statements: 26-39-60-61
RIDADR: UN 3077 9 / PGIII
WGK Germany: 3
HazardClass: 9

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H318Causes serious eye damage

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 506106
Product name: p21-Activated Kinase Inhibitor III, IPA-3
Packaging: 5mg
Price: $126
Updated: 2025/07/31

Sigma-Aldrich

Product number: 506106
Product name: p21-Activated Kinase Inhibitor III, IPA-3
Packaging: 25mg
Price: $428
Updated: 2025/07/31

Cayman Chemical

Product number: 14759
Product name: IPA-3
Purity: ≥95%
Packaging: 5mg
Price: $57
Updated: 2024/03/01

Cayman Chemical

Product number: 14759
Product name: IPA-3
Purity: ≥95%
Packaging: 10mg
Price: $89
Updated: 2024/03/01

Sigma-Aldrich

Product number: I2285
Product name: IPA-3
Purity: ≥95% (HPLC), powder
Packaging: 5mg
Price: $131
Updated: 2025/07/31

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IPA-3 Chemical Properties,Usage,Production

Description

IPA-3 (42521-82-4) is a selective allosteric inhibitor of Group 1 p21-activated kinase (PAK1 IC50?= 2.5 μM)1?via covalent binding to the PAK1 regulatory domain preventing binding to the upstream activator Cdc422. IPA-3 has been shown to induce cell death in human leukemic cell lines3, significantly inhibit TGFβ1-induced prostate cell epithelial to mesenchymal transition4?and inhibit the growth of liver cancer cells5.

Uses

p21-activated kinase 1 (PAK1) is a member of a family non-receptor serine/threonine kinases that are vital to normal cell function. Binding of various upstream partners to PAK1 results in release of an autoinhibitory domain that blocks activity of the kinase domain. PAK1 expression and activity is upregulated in several human cancers and is a potential therapeutic target for cancer intervention. IPA-3 is a cell-permeable allosteric inhibitor of PAK1 that is non-competitive with respect to ATP binding (IC50 = 2.5 μM). It does not, however, inhibit the activity of PAK1 that has been pre-activated with Cdc42. IPA-3 binds covalently to the PAK1 regulatory domain (apparent Kd = 1.9 uM) and prevents binding to the upstream activator Cdc42.[Cayman Chemical]

Uses

Acts as an allosteric inhibitor of Pak1

Definition

ChEBI: An organic disulfide obtained by oxidative dimerisation of 1-sulfanylnaphthalen-2-ol.

Biological Activity

IPA-3 is a selective non-ATP competitive Pak1 inhibitor with IC50 of 2.5 μM in a cell-free assay, no inhibition to group II PAKs (PAKs 4-6).

Biochem/physiol Actions

IPA-3 is an allosteric inhibitor of Pak1. It binds to autoinhibitory domain of Pak1 (p21 activated kinase), highly selective amongst kinases. Pak1 is implicated in tumorigenesis and metastasis.

in vitro

IPA-3 is a non ATP-competitive, allosteric inhibitor of p21-activated kinase 1 (Pak1). PIR3.5 is the control compound of IPA-3. IPA-3 prevents Cdc42-stimulated Pak1 autophosphorylation on Thr423. IPA-3 also prevents sphingosine-dependent Pak1 autophosphorylation. IPA-3 does not target exposed cysteine residues on Pak1. The disulfide bond of IPA-3 is critical for inhibition of Pak1 and in vitro reduction by the reducing agent dithiothreitol (DTT) abolishes Pak1 inhibition by IPA-3. IPA-3 inhibits activation of Pak1 by diverse activators, but does not inhibit preactivated Pak1. IPA-3 inhibits PDGF-stimulated Pak activation in mouse embryonic fibroblasts. IPA-3 inhibits Pak1 activation in part by binding covalently to the regulatory domain of Pak1. IPA-3 binds Pak1 covalently in a time- and temperature-dependent manner. IPA-3 prevents binding of the Pak1 activator Cdc42. IPA-3 binds directly to the Pak1 autoregulatory domain. IPA-3 reversibly inhibits PMA-induced membrane ruffling in cells.

storage

Store at -20°C

References

[1] SEAN W DEACON. An isoform-selective, small-molecule inhibitor targets the autoregulatory mechanism of p21-activated kinase.[J]. Chemistry & biology, 2008, 15 4: 322-331. DOI:10.1016/j.chembiol.2008.03.005
[2] JULIEN VIAUD J R P. An allosteric kinase inhibitor binds the p21-activated kinase autoregulatory domain covalently.[J]. Molecular Cancer Therapeutics, 2009, 8 9: 2559-2565. DOI:10.1158/1535-7163.mct-09-0102
[3] KATEŘINA KUŽELOVÁ. Group I PAK inhibitor IPA-3 induces cell death and affects cell adhesivity to fibronectin in human hematopoietic cells.[J]. PLoS ONE, 2014: e92560. DOI:10.1371/journal.pone.0092560
[4] AHMAD AL-AZAYZIH Payaningal R S Fei Gao. P21 activated kinase-1 mediates transforming growth factor β1-induced prostate cancer cell epithelial to mesenchymal transition[J]. Biochimica et biophysica acta. Molecular cell research, 2015, 1853 5: Pages 1229-1239. DOI:10.1016/j.bbamcr.2015.02.023
[5] LEO LAP-YAN WONG. IPA-3 inhibits the growth of liver cancer cells by suppressing PAK1 and NF-κB activation.[J]. PLoS ONE, 2013: e68843. DOI:10.1371/journal.pone.0068843

IPA-3 Preparation Products And Raw materials

Raw materials

Preparation Products

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IPA-3 Suppliers

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View Lastest Price from IPA-3 manufacturers

Shenzhen Aoxi Technology Co., Ltd.

Product: P21 (P021) 42521-82-4
Price: US $30.00-10.00/kit
Min. Order: 1kit
Purity: 99%
Supply Ability: 10000kits
Release date: 2025-03-19

42521-82-4, IPA-3Related Search:

Ko 143 Imatinib mesylate ZM 336372 17-AAG Everolimus Bortezomib Selumetinib MG-132 Rapamycin Olaparib

1,1'-Dithiodi-2-naphthtol

IPA 3

p21-Activated Kinase Inhibitor III, IPA-3

Bis(2-hydroxy-1-naphthyl) disulfide

2-Naphthalenol, 1,1'-dithiobis-

1,1′-Disulfanediyldinaphthalen-2-ol

IPA 3;IPA3

p21-Activated Kinase Inhibitor III, IPA-3 - CAS 42521-82-4 - Calbiochem

1,1'-Disulfanediylbis(naphthalen-2-ol)

1-[(2-hydroxy-1-naphthyl)disulfanyl]naphthalen-2-ol

1'-Dithiodi-2-naphthtol

1,1'-Dithiodi-2-naphthtol USP/EP/BP

inhibit,Inhibitor,IPA-3,p21 activated kinases,PAK

IPA 3, Group I, p21-activated kinase (PAK) inhibitor

IPA-3, 10 mM in DMSO

42521-82-4

Inhibitors

PAK Inhibitor III, IPA-3

PAK Inhibitor III

1,1'-disulfanediylbis(naphthalen-2-ol)