Altenusin (CAS: 31186-12-6)

Altenusin is a fungal-derived biphenyl metabolite originally isolated as an inhibitor of myosin light chain kinase from microbial sources. Subsequent studies demonstrated its inhibitory activity against protein tyrosine phosphatase 1B (PTP1B), a regulator of insulin and inflammatory signaling pathways, supporting its potential metabolic and anti-inflammatory relevance. Altenusin also inhibits trypanothione reductase from Trypanosoma cruzi, a key enzyme in parasite redox metabolism, suggesting antiparasitic potential. Collectively, these findings establish altenusin as a multifunctional natural product enzyme inhibitor targeting phosphorylation-dependent signaling and redox regulatory systems.