Related Experiment Video
Updated: May 20, 2026

Reverse Yeast Two-hybrid System to Identify Mammalian Nuclear Receptor Residues that Interact with Ligands and/or Antagonists
Published on: November 15, 2013
Synthesis and biological evaluation of novel pentacyclic triterpene derivatives as potential PPARγ agonists
Liying Zhang1, Jizhe Dong, Jun Liu
1Institute of Traditional Chinese Medicine, Chengde Medical College, Chengde 067000, People’s Republic of China.
Abstract:
Synthesis and biological evaluation of a novel series of substituted pentacyclic triterpene derivatives as potential PPARγ agoinsts and glycogen phosphorylase inhibitors have been described. Compounds 11 and 17 showed potent PPARγ agonistic activity and activated the transcription activity of PPARγ in a dose-dependent manner. On the other hand, eleven compounds exhibited moderate inhibitory activity against rabbit muscle glycogen phosphorylase a (RMGPa), and triterpene 10 was the best one. Structure-activity relationship (SAR) is also discussed.
Related Concept Videos
Transducer Mechanism: Nuclear Receptors
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
GPCRs Regulate Adenylyl Cylase Activity
Two...
Transducer Mechanism: Enzyme-Linked Receptors
Major types that are helpful drug targets include:
G Protein-coupled Receptors
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
Drug-Receptor Interaction: Agonist
Agonists can bind to receptors in different ways. Some agonists bind directly to the receptor's active site, mimicking the endogenous ligand's action.
