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Related Concept Videos

Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes01:28

Pharmacogenetics of Phase I Enzymes: Cytochrome P450 Isozymes

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Cytochrome P450 (CYP450) enzymes are a superfamily of heme-containing monooxygenases that play a pivotal role in Phase I drug metabolism by catalyzing oxidation and reduction reactions.These enzymes transform lipophilic xenobiotics into more hydrophilic metabolites, facilitating subsequent Phase II conjugation and eventual excretion. The CYP450 family is classified into families (e.g., CYP1–CYP3) and subfamilies (e.g., CYP2A, CYP2C), based on amino acid sequence homology.CYP450...
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A phase I reaction is a biochemical process that introduces a functionally reactive polar group to a substance. This transformation predominantly occurs in the liver, facilitated by the cytochrome P450 system of hemoproteins situated in the lipophilic endoplasmic reticulum of cells. The metabolite generated through this process can have varying polarities. If it is sufficiently polar, it can be easily excreted in the urine due to its water compatibility. However, if the metabolite is nonpolar,...
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Lipid Catabolism

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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
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Related Experiment Video

Updated: Apr 16, 2026

Human Neuroendocrine Tumor Cell Lines as a Three-Dimensional Model for the Study of Human Neuroendocrine Tumor Therapy
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Multidimensional Engineering Delivers a High-Performance C11α-Steroid Hydroxylase for Practical Application.

Lingrui Wei1, Zhiyong Guo1, Yingchao Li1

  • 1State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan 430062, P. R. China.

Journal of Agricultural and Food Chemistry
|April 14, 2026
PubMed
Summary
This summary is machine-generated.

We developed a sustainable biocatalytic method for steroid synthesis using a fungal enzyme. This engineered enzyme and optimized yeast host significantly improved the production of key steroid intermediates.

Keywords:
chassis modificationcytochrome P450 enzymeenzyme engineeringheterologous expressionsteroid C11α-hydroxylation

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Area of Science:

  • Biotechnology
  • Enzyme Engineering
  • Synthetic Biology

Background:

  • The C11α-hydroxyl group is crucial for steroid drug efficacy.
  • Chemical synthesis of steroids is complex and environmentally taxing.

Purpose of the Study:

  • To develop a sustainable biocatalytic route for steroid functionalization.
  • To engineer a fungal cytochrome P450 for efficient steroid hydroxylation.

Main Methods:

  • Isolation and expression of fungal cytochrome P450 CYP68N3_ma.
  • Structure-guided mutagenesis to enhance enzyme activity.
  • Optimization of microbial host (yeast) and fermentation conditions.

Main Results:

  • CYP68N3_ma demonstrated specific conversion of 17α-hydroxyprogesterone.
  • Engineered triple mutant N3M3 increased conversion 13.8-fold.
  • Optimized fermentation achieved 24.8 g/L product concentration.

Conclusions:

  • A versatile, scalable, and sustainable biocatalytic process for steroid synthesis was established.
  • Enzyme engineering and host optimization are key for efficient biotransformation.