Download MendeleyStructure and Inhibition of Insect UDP- N -acetylglucosamine Pyrophosphorylase: A Key Enzyme in the Hexosamine Biosynthesis Pathway.
Lu, Q., Zhou, Y., Ding, Y., Cui, Y., Li, W., Liu, T.(2024) J Agric Food Chem 72: 19286-19294
- PubMed: 39039661
- DOI: https://doi.org/10.1021/acs.jafc.4c03834
- Primary Citation of Related Structures:
8YP3 - PubMed Abstract:
UDP- N -acetylglucosamine pyrophosphorylase (UAP) catalyzes the last step in the hexosamine biosynthesis pathway to directly produce UDP- N -acetylglucosamine (UDP-GlcNAc). Because UAPs play important physiological and pathological roles in organisms, they are considered potential targets for drug and pesticide development. However, the lack of efficient and selective inhibitors is a bottleneck that must be overcome. This study reports the first crystal structure of the insect UAP from Spodoptera frugiperda ( Sf UAP) in complex with UDP-GlcNAc. Sf UAP has two insect-specific structural characteristics in the active pocket, namely, a free Cys (Cys 334 ) and a Mg 2+ binding site, which differentiate it from human UAP ( Hs AGX1) and fungal UAP ( Af UAP) in terms of substrate and inhibitor binding. N -(4-Nitrophenyl)maleimide ( p NPMI) and myricetin are discovered as potent covalent and noncovalent inhibitors of Sf UAP, respectively. Moreover, myricetin can significantly reduce the level of cellular O -GlcNAcylation by inhibiting both UAP and O -GlcNAc transferase. These findings provide novel insights into the development of UAP-based drugs and pesticides.
Organizational Affiliation:
MOE Key Laboratory of Bio-Intelligent Manufacturing, School of Bioengineering, Dalian University of Technology, Dalian 116024, China.
