Date published: 2025-10-15

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ORC4 Inhibitors

ORC4 inhibitors belong to a chemical class that specifically targets the ORC4 protein, an essential component of the Origin Recognition Complex (ORC). The ORC is a multi-subunit protein complex that plays a pivotal role in the initiation of DNA replication in eukaryotic cells. The ORC4 protein, in particular, is involved in recognizing and binding to specific DNA sequences known as origins of replication. By inhibiting the activity of ORC4, these inhibitors disrupt the formation and stability of the ORC complex, impairing the initiation of DNA replication. ORC4 inhibitors are designed to selectively bind to the ORC4 protein, inhibiting its function and interfering with the normal process of DNA replication. This disruption of DNA replication can have profound effects on cellular proliferation and growth. The targeted inhibition of ORC4 may also lead to other downstream effects, such as alterations in chromatin structure and gene expression. The development and study of ORC4 inhibitors are important for gaining a better understanding of the fundamental mechanisms underlying DNA replication and cell division. By selectively inhibiting ORC4, researchers can investigate the consequences of impaired DNA replication and gain insights into the molecular basis of diseases associated with uncontrolled cell growth, such as cancer. Additionally, ORC4 inhibitors serve as valuable tools in basic research settings, enabling scientists to dissect the intricate processes involved in DNA replication.
Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Hydroxyurea

127-07-1sc-29061
sc-29061A
5 g
25 g
$76.00
$255.00
18
(1)

HU is a well-known DNA synthesis inhibitor that indirectly affects Orc4 function by causing DNA replication stress. It leads to the activation of checkpoint pathways and inhibits replication initiation.

Triptolide

38748-32-2sc-200122
sc-200122A
1 mg
5 mg
$88.00
$200.00
13
(1)

Triptolide is a natural compound found in the Chinese medicinal plant Tripterygium wilfordii. It has been reported to inhibit the function of Orc4 and impair DNA replication.

MLN 4924

905579-51-3sc-484814
1 mg
$280.00
1
(0)

MLN4924, mentioned earlier as an NDFIP1 inhibitor, is also known to inhibit the activity of OrcIt targets NEDD8-activating enzyme (NAE), preventing the neddylation and activation of Orc4.