nsc-305831

Furamidine is also a selective and cell-permeable protein arginine methyltransferase 1 (PRMT1) inhibitor with an IC50 of 9.4 μM. Furamidine is selective for PRMT1 over PRMT5, PRMT6, and PRMT4 (CARM1) (IC50s of 166 μM, 283 μM, and >400 μM, respectively). Furamidine (DB75) is abisbenzamidine derivative and an antiparasite agent. Furamidine is a potent, reversible and competitive tyrosyl-DNA phosphodiesterase 1 (TDP-1) inhibitor. Inhibition of TDP-1 by Furamidine is effective both with single- and double-stranded DNA substrates but is slightly stronger with the duplex DNA.

Furamidine dihydrochloride (DB75 dihydrochloride) is a cell-permeable, selective small molecule inhibitor of protein arginine methyltransferase 1 (PRMT1) that also binds preferentially to strings of AT base pair sequences within the minor groove of DNA; it targets the PRMT1 enzyme active site primarily through a competitive mechanism with the protein substrate and is noncompetitive toward the cofactor, ultimately leading to the blockade of cell proliferation in various leukemia cell lines irrespective of their genetic lesions.