| | Identification | Back Directory |  | [Name] 
 PFM01
 |  | [CAS] 
 1558598-41-6
 |  | [Synonyms] 
 PFM01
 PFM01 >=98% (HPLC)
 (5Z)-5-[(4-Hydroxyphenyl)methylene]-3-(2-methylpropyl)-2-thioxo-4-thiazolidinone
 |  | [Molecular Formula] 
 C14H15NO2S2
 |  | [MDL Number] 
 MFCD02220972
 |  | [MOL File] 
 1558598-41-6.mol
 |  | [Molecular Weight] 
 293.4
 | 
 | Chemical Properties | Back Directory |  | [Boiling point ] 
 435.2±55.0 °C(Predicted)
 |  | [density ] 
 1.35±0.1 g/cm3(Predicted)
 |  | [storage temp. ] 
 2-8°C
 |  | [solubility ] 
 Soluble in DMSO
 |  | [form ] 
 powder
 |  | [pka] 
 8.59±0.30(Predicted)
 |  | [color ] 
 white to beige
 | 
 | Hazard Information | Back Directory |  | [Uses] 
 PFM01, N-alkylated Mirin derivative, is a MRE11 endonuclease inhibitor. PFM01 can regulate double-strand break repair (DSBR) by nonhomologous end-joining (NHEJ) versus homologous recombination (HR)[1][2].
 |  | [Biochem/physiol Actions] 
 PFM01 is a cell-permeable N-alkylated Mirin (Sigma Cat. No. 475954) derivative that selectively inhibits against MRE11 endo-, but not exo-, nuclease activity. PFM01 targets MRE11 at a site near the dimer interface, distinct from that occupied by Mirin and PFM39 to allow disruption of the ssDNA-binding groove and selective inhibition against MRE11 endo-, but not exo-, nuclease activity. While both endonuclease and exonuclease activities are required for MRE11-mediated homologous recombination (HR) repair, only FM01 (100 μM), but not the exonuclease inhibitors Mirin (500 μM) and PFM39 (100 μM), rescues G2-phase double-strand break (DSB) repair defect in HR protein BRCA2-deficient HSC62-hTERT fibroblasts following ionizing irradiation (IR) by blocking HR initiation and thereby allowing non-homologous end joining (NHEJ) to proceed.
 |  | [storage] 
 Store at -20°C
 |  | [References] 
 [1] Shibata A, et, al. DNA double-strand break repair pathway choice is directed by distinct MRE11 nuclease activities. Mol Cell. 2014 Jan 9; 53(1): 7-18. DOI:10.1016/j.molcel.2013.11.003
 [2] V?lkening L, et, al. RAD50 regulates mitotic progression independent of DNA repair functions. FASEB J. 2020 Feb; 34(2): 2812-2820. DOI:10.1096/fj.201902318R
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