SMC6 Inhibitors

The chemical class of SMC6 inhibitors is characterized by a diverse range of compounds that indirectly influence the functional dynamics of SMC6 by targeting various aspects of DNA replication, repair, and the cellular response to DNA damage. These inhibitors do not directly target SMC6 but affect the cellular environment and processes in which SMC6 is a critical participant. Their modes of action vary from interfering with DNA replication machinery to modulating the cellular response to DNA damage and stress.

Compounds such as camptothecin and etoposide target DNA topoisomerases, enzymes crucial for resolving DNA topological issues during replication and transcription. By inhibiting these enzymes, these compounds can induce replication stress and DNA damage, creating a cellular environment that requires the involvement of SMC6 in DNA repair and maintenance processes. Similarly, DNA crosslinking agents like Mitomycin C and Cisplatin directly damage DNA, triggering repair mechanisms where SMC6 plays a role. Hydroxyurea, by inhibiting ribonucleotide reductase, reduces the availability of nucleotides for DNA synthesis, indirectly affecting SMC6's role in managing replication stress. In addition to these, the class includes inhibitors of key kinases like ATR, ATM, and CHK1 (e.g., VE-821, KU-55933, and AZD7762, respectively), which are integral to the DNA damage response pathways. By modulating these pathways, these inhibitors can influence the recruitment and activity of SMC6 in DNA repair processes. PARP inhibitors like Olaparib also play a role by affecting single-strand break repair, a process linked to SMC6 activity.