Nur77/NR4A1 Inhibitor

Celastrol (Tripterine;Tripterin) is a proteasome inhibitor which potently and preferentially inhibits the chymotrypsin-like activity of a purified 20S proteasome with IC₅₀ of 2.5 μM. In addition, Celastrol is also an antibiotic with potent antimicrobial activity against standard and clinical methicillin-resistant Staphylococcus aureus (MRSA) strains, inducing oxidative stress and inhibiting DNA synthesis by binding to P5CDH.

Glycerol kinase, microorganism (GyK) acts as a NR4A1 inhibitor with enzymatic activity. It directly binds to and inhibits the transcription factor NR4A1, thereby negatively regulating hepatic gluconeogenesis and reducing blood glucose levels. Glycerol kinase, microorganism positively regulates UCP1 expression via partial dependence on the β-adrenergic receptor-cAMP-CREB pathway, promotes browning of white adipose tissue and thermogenesis, and further modulates intracellular fatty acid composition and energy metabolism. In diabetic mouse models, overexpression of Glycerol kinase effectively antagonizes NR4A1-induced hyperglycemia, demonstrating potential for improving glucose homeostasis. Glycerol kinase, microorganism can be used for studies on diabetes and obesity.