Related Experiment Video

Updated: Jul 2, 2025

Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase
11:01

Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase

Published on: November 23, 2016

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Enzymatic-related network of catalysis, polyamine, and tumors for acetylpolyamine oxidase: from calculation to

Dong Fang1,2, Zhiyang Zhang1, Jihang Zhai1

  • 1The Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University Kaifeng 475000 P. R. China zhaoyuan@henu.edu.cn wcjsxq@henu.edu.cn.

Chemical Science
|February 26, 2024
PubMed

Insights

This study maps acetylpolyamine oxidase (APAO) catalysis, revealing a hydride transfer mechanism. Suppressing APAO via His64 mutation inhibits tumor growth, offering new anti-cancer strategies.

Area of Science:

  • Biochemistry
  • Enzymology
  • Computational Chemistry

Background:

  • Polyamines are crucial in cellular processes, and their dysregulation is linked to cancer.
  • Developing anti-cancer agents targeting polyamine metabolism remains a significant challenge.
  • Understanding enzyme mechanisms is key to designing effective therapeutics.

Purpose of the Study:

  • To elucidate the comprehensive catalytic mechanism of acetylpolyamine oxidase (APAO).
  • To investigate the kinetics of chemical transformation and product release in APAO.
  • To explore a novel anti-tumor strategy targeting APAO activity.

Main Methods:

  • Multiscale simulations utilizing over six million dynamical snapshots.
  • Analysis of enzyme-substrate binding and reaction pathways.
  • In vitro and in vivo studies involving tumor cell lines and tissues.

Main Results:

  • Detailed catalytic map of APAO, including exothermic acetylspermine transport and high binding affinity.
  • Identification of hydride transfer to FAD as the rate-limiting step via H-shift coupled electron transfer.
  • Stepwise product release mechanism impacting enzymatic efficiency and demonstration that His64 mutation inhibits tumor growth and migration.

Conclusions:

  • The study provides unprecedented mechanistic insights into APAO catalysis.
  • Targeting APAO, specifically through His64, presents a promising therapeutic strategy for cancer treatment.
  • This research opens new avenues for designing polyamine analogs and advancing anti-tumor research.

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