prors

Halofuginone specifically inhibits collagen type I gene expression and matrix metalloproteinase 2 (MMP-2) gene expression, which may result in the suppression of angiogenesis, tumor stromal cell development, and tumor cell growth. Halofuginone Hydrobromide is the hydrobromide salt of halofuginone, a semisynthetic quinazolinone alkaloid anticoccidial derived from the plant Dichroa febrifuga, with antifibrotic and potential antineoplastic activities. These effects appear to be due to halofuginone-mediated inhibition of the collagen type I and MMP-2 promoters. Collagen type I and MMP-2 play important roles in fibroproliferative diseases.

PAA-38 is an effective and selective inhibitor targeting bacterial prolyl-tRNA synthetase (ProRS). It inhibits Pseudomonas aeruginosa ProRS (PaProRS) with a Kd of 0.399 nM and an IC50 of 4.97 nM. The IC50 for human cytoplasmic ProRS (HsProRS) is 35.5 nM. In vitro, PAA-38 exhibits a minimum inhibitory concentration (MIC) of 4-8 μg/mL.

Antibacterial agent 124 is a potent inhibitor of bacterial prolyl-tRNA synthetase (ProRS), specifically targeting Staphylococcus aureus ProRS (Sa ProRS) with an inhibitory concentration (IC50) of 0.18 μM.