Date published: 2026-6-6

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PI 3-kinase p55γ Inhibitors

PI 3-kinase inhibitors, while not specifically targeting the p55γ regulatory subunit, focus on inhibiting the activity of phosphatidylinositol 3-kinases (PI 3-kinases), a family of enzymes involved in various cellular functions, including cell growth, proliferation, differentiation, motility, survival, and intracellular trafficking. The p55γ subunit is one of the regulatory subunits of class IA PI 3-kinases, which also includes the p85 regulatory and p110 catalytic subunits. These inhibitors mainly target the ATP-binding site of the p110 catalytic subunit of PI 3-kinases, which is crucial for their kinase activity. By binding to this site, these inhibitors block ATP from interacting with the kinase, thus inhibiting its ability to phosphorylate phosphatidylinositol substrates. This action effectively downregulates the PI 3-kinase/AKT signaling pathway, which is often hyperactivated in various cancers.

These inhibitors vary in their specificity and selectivity. Some, like LY294002 and Wortmannin, are broad-spectrum and affect multiple isoforms of PI 3-kinases. Others, such as Idelalisib and Copanlisib, are more selective, primarily targeting specific isoforms of the p110 catalytic subunit. The development of these inhibitors is driven by the need to address the role of dysregulated PI 3-kinase signaling in diseases, particularly in oncology.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

LY 294002

154447-36-6sc-201426
sc-201426A
5 mg
25 mg
$123.00
$400.00
148
(1)

LY294002 is a broad-spectrum inhibitor of PI 3-kinase, affecting various isoforms including the p55γ-associated p110 catalytic subunits. It binds to the ATP-binding site of these kinases, thereby inhibiting their activity.

Wortmannin

19545-26-7sc-3505
sc-3505A
sc-3505B
1 mg
5 mg
20 mg
$67.00
$223.00
$425.00
97
(3)

Wortmannin is a potent, irreversible inhibitor of PI 3-kinase, impacting multiple isoforms including those associated with p55γ. It covalently binds to a specific residue in the kinase domain, inhibiting its activity.

PI-103

371935-74-9sc-203193
sc-203193A
1 mg
5 mg
$33.00
$131.00
3
(1)

PI-103 is a dual inhibitor of PI 3-kinase and mTOR, affecting the p55γ-related PI 3-kinase activity among others. It targets the ATP-binding domain of these kinases.

CAL-101

870281-82-6sc-364453
10 mg
$193.00
4
(1)

While CAL-101 predominantly targets the p110δ isoform of PI 3-kinase, it may have off-target effects on complexes involving p55γ. It inhibits kinase activity by binding to the ATP-binding site.

BKM120

944396-07-0sc-364437
sc-364437A
sc-364437B
sc-364437C
5 mg
10 mg
25 mg
50 mg
$176.00
$235.00
$281.00
$339.00
9
(0)

BKM120, also known as Buparlisib, is a pan-class I PI 3-kinase inhibitor, affecting various isoforms including those related to p55γ. It competitively inhibits the ATP-binding site of the kinase.

BAY 80-6946

1032568-63-0sc-503264
5 mg
$562.00
(0)

BAY 80-6946 is a pan-PI 3-kinase inhibitor with predominant activity against the p110α and δ isoforms, and may affect p55γ-associated complexes. It inhibits the kinase activity by binding to the ATP-binding domain.

IPI 145

1201438-56-3sc-488318
5 mg
$317.00
(0)

Duvelisib primarily targets p110δ and γ isoforms of PI 3-kinase, and may indirectly influence p55γ-associated complexes. It acts by competing with ATP at the kinase domain.

GSK2126458

1086062-66-9sc-364503
sc-364503A
2 mg
10 mg
$265.00
$1050.00
(0)

GSK2126458 is a dual inhibitor of PI 3-kinase and mTOR, potentially affecting p55γ-related PI 3-kinase activity. It binds to the ATP-binding sites of these kinases.

ZSTK 474

475110-96-4sc-475495
5 mg
$75.00
(0)

ZSTK474 inhibits class I PI 3-kinase activity, potentially affecting p55γ-associated complexes. It acts by binding to the ATP-binding domain of the kinase.

BYL719

1217486-61-7sc-391001
sc-391001A
sc-391001B
sc-391001C
sc-391001D
sc-391001E
5 mg
10 mg
50 mg
100 mg
500 mg
1 g
$391.00
$597.00
$755.00
$1192.00
$5000.00
$9370.00
2
(0)

BYL719 specifically inhibits the p110α isoform of PI 3-kinase, but may have indirect effects on p55γ-associated kinase activity. It targets the ATP-binding site.