Date published: 2026-4-24

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ATR Inhibitors

ATR (ATR serine/threonine kinase) is a pivotal enzyme involved in the cellular response to DNA damage, specifically during replication stress. It belongs to the family of phosphatidylinositol 3-kinase-related kinases (PIKKs) and plays a central role in the DNA damage response (DDR) pathway. When DNA replication is stalled due to obstacles like DNA lesions, mismatches, or secondary structures, ATR is activated. Upon activation, ATR can phosphorylate a plethora of downstream substrates, including the checkpoint kinase CHK1. This cascade of events leads to cell cycle arrest, allowing the cell time to repair the damage or to undergo programmed cell death. The precise regulation of ATR is essential for maintaining genome integrity, and dysregulation of its activity can contribute to genomic instability and a plethora of cellular anomalies. ATR inhibitors are a class of chemical compounds meticulously designed to target and modulate the activity of ATR kinase. These inhibitors function by binding to the kinase domain of ATR, obstructing its activation and subsequent phosphorylation of target substrates. Some ATR inhibitors may act by competing with ATP for binding to the kinase domain, thereby preventing the transfer of phosphate groups to substrate proteins. Others might induce conformational changes in ATR, rendering it inactive.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

BEZ235

915019-65-7sc-364429
50 mg
$211.00
8
(1)

BEZ235 acts as an ATR by selectively inhibiting the activity of specific kinases involved in cellular signaling pathways. Its unique structure allows for precise interactions with the ATP-binding sites of these kinases, leading to altered phosphorylation patterns. The compound demonstrates distinct reaction kinetics, with a fast initial binding phase followed by a prolonged engagement, effectively modulating downstream signaling cascades and influencing cellular responses.

VE 821

1232410-49-9sc-475878
10 mg
$360.00
(0)

VE-821 is a selective ATR kinase inhibitor that inhibits ATR-mediated phosphorylation, impacting DNA damage repair processes.

ATM/ATR Kinase Inhibitor Inhibitor

905973-89-9sc-202964
5 mg
$106.00
8
(1)

CGK733 inhibits both ATM and ATR kinases, affecting the cellular response to DNA damage.

Ceralasertib

1352226-88-0sc-507439
10 mg
$573.00
(0)

AZD6738 is a potent inhibitor of ATR kinase activity, which hinders ATR-dependent signaling and disrupts DNA damage repair.

ETP-46464

1345675-02-6sc-497432
10 mg
$550.00
(0)

ETP-46464 is a potent and selective ATR inhibitor that disrupts ATR-mediated DNA damage response pathways.

SCH 900776

891494-63-6sc-364611
sc-364611A
5 mg
10 mg
$255.00
$338.00
(0)

MK-8776 selectively inhibits CHK1, a downstream target of ATR, and indirectly impacts ATR activity.

Diminazene Aceturate

908-54-3sc-205651
sc-205651A
1 g
5 g
$92.00
$377.00
11
(1)

BERENIL, though primarily a trypanocidal agent, has shown to inhibit ATR kinase activity.

ATM Kinase Inhibitor

587871-26-9sc-202963
2 mg
$110.00
28
(2)

KU-55933 is primarily an ATM inhibitor but indirectly affects ATR's function within the DNA damage response pathway.

KU 60019

925701-46-8sc-363284
sc-363284A
10 mg
50 mg
$248.00
$1035.00
1
(1)

Like KU-55933, KU-60019 inhibits ATM and can indirectly influence ATR's role in DNA damage repair processes.

NU6027

220036-08-8sc-215591
10 mg
$156.00
1
(1)

NU6027 is a potent inhibitor of CDK2 and ATR, impacting the cell cycle and DNA repair processes.