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Protoporphyrin IX Biosynthesis Pathway (PPIX Pathway)
- Target
- PPIX Pathway
- Molecular classification
- Metabolic Pathway, Enzyme Cascade
01
Overview
The protoporphyrin IX biosynthesis pathway is a highly conserved metabolic route responsible for the production of protoporphyrin IX (PPIX), a key intermediate in the synthesis of heme, chlorophyll, and cobalamin (vitamin B12). This pathway is essential for cellular respiration, oxygen transport, and photosynthesis across diverse organisms. Disorders affecting this pathway can result in accumulation of intermediates such as PPIX, leading to conditions like Erythropoietic protoporphyria (EPP) and iron deficiency anemia.
- Other names
- Heme Biosynthesis PathwayChlorophyll Biosynthesis PathwayTetrapyrrole Biosynthesis Pathway
02
Mechanism of action
Inhibition of enzymes in the pathway leads to decreased heme or chlorophyll synthesis.
03
Biological functions
Heme biosynthesisChlorophyll biosynthesisCobalamin biosynthesisCellular respirationOxygen transportPhotosynthesis
04
Disease associations
PorphyriaErythropoietic Protoporphyria (EPP)Iron deficiency anemia
05
Safety considerations
PhotosensitivityLiver dysfunctionAccumulation of pathway intermediates
06
Biomarkers
Protoporphyrin IX levelsδ-Aminolevulinic acid (ALA) levelsPorphobilinogen levels
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