Chemicals and Drugs

Protoporphyrinogen Oxidase

A membrane-bound flavoenzyme that catalyzes the oxygen-dependent aromatization of protoporphyrinogen IX (Protogen) to protoporphyrin IX (Proto IX). It is the last enzyme of the common branch of the HEME and CHLOROPHYLL pathways in plants, and is the molecular target of diphenyl ether-type herbicides. VARIEGATE PORPHYRIA is an autosomal dominant disorder associated with deficiency of protoporphyrinogen oxidase.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A membrane-bound flavoenzyme that catalyzes the oxygen-dependent aromatization of protoporphyrinogen IX (Protogen) to protoporphyrin IX (Proto IX). It is the last enzyme of the common branch of the HEME and CHLOROPHYLL pathways in plants, and is the molecular target of diphenyl ether-type herbicides. VARIEGATE PORPHYRIA is an autosomal dominant disorder associated with deficiency of protoporphyrinogen oxidase.

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Classification

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Synonyms

7 entry terms
  • Protoporphyrinogen Dehydrogenase
  • Protoporphyrinogen IX Oxidase
  • Protoporphyrinogenase
  • Protox
  • Dehydrogenase, Protoporphyrinogen
  • Oxidase, Protoporphyrinogen
  • Oxidase, Protoporphyrinogen IX

MeSH Record

Aspects Covered

28 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

2006(1975)

MeSH Record

Previous Indexing

  • Oxidoreductases (1993-2003)
  • Oxidoreductases Acting on CH-CH Group Donors (2004-2005)
  • Porphyrins (1975-1976)
  • Protoporphyrins (1975-1982)

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AMA Style

References

  1. National Library of Medicine. Protoporphyrinogen Oxidase. Medical Subject Headings (MeSH). 2026. Unique ID D050768. http://id.nlm.nih.gov/mesh/2026/D050768
  2. Protoporphyrinogen Oxidase. In: Wikidata. https://www.wikidata.org/wiki/Q24774393