Psf1 Inhibitors
Chemical inhibitors of Psf1 can interfere with its role in DNA replication initiation and progression through various mechanisms. Aphidicolin, for instance, selectively targets DNA polymerase alpha and delta, crucial for the DNA synthesis that Psf1 facilitates as part of the GINS complex. By inhibiting these polymerases, aphidicolin directly prevents the replication fork's progression, thereby inhibiting Psf1's function. Similarly, camptothecin and etoposide, through their inhibition of topoisomerase I and II respectively, induce DNA breaks and impede DNA unwinding and synthesis. The resulting DNA damage and the prevention of supercoil relaxation indirectly inhibit Psf1 by disrupting the replication fork's smooth advancement, which Psf1 is integral to. Mitoxantrone contributes to this effect by intercalating with DNA and halting topoisomerase II activity, further inhibiting DNA replication and transcription processes that Psf1 is essential for.
Compounds such as hydroxyurea and gemcitabine disrupt the supply and integrity of the DNA building blocks. Hydroxyurea depletes deoxyribonucleotide pools by inhibiting ribonucleotide reductase, while gemcitabine incorporates itself into DNA, causing chain termination. Both actions lead to a compromised DNA replication process, functionally inhibiting Psf1's activity in initiating this fundamental cellular process. Cytarabine's incorporation into DNA similarly interrupts DNA replication, which would indirectly inhibit Psf1. Palbociclib and flavopiridol target the cell cycle machinery; by inhibiting CDK4/6 and CDK1 respectively, they cause cell cycle arrest, thereby preventing Psf1 from engaging in its role during DNA replication initiation. Thioguanine, trifluridine, and clofarabine also target DNA synthesis and integrity but through different mechanisms. Thioguanine and trifluridine get incorporated into DNA, leading to dysfunctional replication, while clofarabine inhibits both ribonucleotide reductase and DNA polymerases, further impeding DNA synthesis. These disruptions to DNA integrity and synthesis all serve to indirectly inhibit the functional role of Psf1 in the DNA replication process.
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| Product Name | CAS # | Catalog # | QUANTITY | Price | Citations | RATING |
|---|---|---|---|---|---|---|
Aphidicolin | 38966-21-1 | sc-201535 sc-201535A sc-201535B | 1 mg 5 mg 25 mg | $84.00 $306.00 $1104.00 | 30 | |
Aphidicolin is a tetracyclic diterpene antibiotic that selectively inhibits DNA polymerase alpha and delta. Psf1 is a component of the GINS complex, essential for the initiation of DNA replication. Inhibition of DNA polymerase impairs DNA synthesis, thereby functionally inhibiting Psf1's role in DNA replication initiation. | ||||||
Camptothecin | 7689-03-4 | sc-200871 sc-200871A sc-200871B | 50 mg 250 mg 100 mg | $58.00 $186.00 $94.00 | 21 | |
Camptothecin is a topoisomerase I inhibitor that prevents DNA unwinding. As Psf1 is involved in the DNA replication process, stabilizing the topoisomerase I-DNA cleavage complex hinders replication fork progression, thus indirectly inhibiting the functional role of Psf1. | ||||||
Etoposide (VP-16) | 33419-42-0 | sc-3512B sc-3512 sc-3512A | 10 mg 100 mg 500 mg | $51.00 $231.00 $523.00 | 63 | |
Etoposide is a topoisomerase II inhibitor, leading to DNA breaks and the inhibition of DNA synthesis. Psf1, being part of the replication machinery, would be indirectly inhibited as the progression of the replication fork would be compromised due to the inability to relieve supercoils ahead of the replication complex. | ||||||
Mitoxantrone | 65271-80-9 | sc-207888 | 100 mg | $285.00 | 8 | |
Mitoxantrone is an anthracenedione antineoplastic agent that intercalates with DNA and inhibits topoisomerase II. This dual action results in cross-linked DNA, disrupting DNA replication and transcription. The replication-associated function of Psf1 is indirectly inhibited as a result of the impaired DNA replication. | ||||||
Hydroxyurea | 127-07-1 | sc-29061 sc-29061A | 5 g 25 g | $78.00 $260.00 | 18 | |
Hydroxyurea inhibits ribonucleotide reductase, which is responsible for the synthesis of deoxyribonucleotides needed for DNA replication. As Psf1 is crucial for the initiation of DNA replication, the depletion of deoxyribonucleotides indirectly inhibits Psf1's function in DNA replication. | ||||||
2′-Deoxy-2′,2′-difluorocytidine | 95058-81-4 | sc-275523 sc-275523A | 1 g 5 g | $56.00 $128.00 | ||
Gemcitabine is a nucleoside analog that gets incorporated into DNA, leading to chain termination during the DNA replication process. Psf1, which is involved in the initiation and progression of DNA replication, would be indirectly inhibited due to the premature termination of DNA synthesis. | ||||||
1-β-D-Arabinofuranosylcytosine | 147-94-4 | sc-201628 sc-201628A sc-201628B sc-201628C sc-201628D | 1 g 5 g 25 g 100 g 250 g | $150.00 $263.00 $518.00 $731.00 $1461.00 | 1 | |
1-β-D-Arabinofuranosylcytosine is a cytidine analog that inhibits DNA polymerase and gets incorporated into DNA, interrupting DNA replication. This action would indirectly inhibit Psf1 by preventing the progression of the replication forks at which Psf1 operates. | ||||||
Palbociclib | 571190-30-2 | sc-507366 | 50 mg | $321.00 | ||
Palbociclib is a selective inhibitor of cyclin-dependent kinases 4 and 6 (CDK4/6) that are involved in cell cycle progression. Inhibition of these kinases results in cell cycle arrest, which indirectly inhibits Psf1 by preventing the entry into S phase where Psf1 is active in DNA replication initiation. | ||||||
Flavopiridol | 146426-40-6 | sc-202157 sc-202157A | 5 mg 25 mg | $78.00 $259.00 | 41 | |
Flavopiridol inhibits several cyclin-dependent kinases, including CDK1, which is essential for cell cycle progression. By inhibiting the cell cycle progression, particularly the transition from G1 to S phase, Flavopiridol indirectly inhibits the activity of Psf1 in the initiation of DNA replication. | ||||||
6-Thioguanine | 154-42-7 | sc-205587 sc-205587A | 250 mg 500 mg | $42.00 $54.00 | 3 | |
Thioguanine is a guanine analog that gets incorporated into DNA and disrupts its function and replication. By interfering with the proper assembly of DNA during the S phase, Thioguanine indirectly inhibits Psf1's role in DNA replication initiation and progression. | ||||||