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Updated: May 23, 2026

Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids
Published on: January 26, 2012
Two distinct pathways for essential metabolic precursors for isoprenoid biosynthesis
Tomohisa Kuzuyama1, Haruo Seto
1Biotechnology Research Center, The University of Tokyo, Tokyo, Japan. utkuz@mail.ecc.u-tokyo.ac.jp
Isoprenoids are vital molecules synthesized via isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). This review details the discovery of the mevalonate-independent pathway for IPP and DMAPP biosynthesis in prokaryotes.
Area of Science:
- Biochemistry
- Molecular Biology
- Microbiology
Background:
- Isoprenoids are essential molecules with diverse biological roles across all domains of life.
- Their biosynthesis relies on isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP).
- The mevalonate pathway is established in eukaryotes, but absent in most prokaryotes.
Purpose of the Study:
- To investigate the alternative biosynthesis pathway of IPP and DMAPP in prokaryotes.
- To provide a comprehensive understanding of the mevalonate-independent pathway.
Main Methods:
- Literature review focusing on key research contributions.
- Analysis of gene homologs and metabolic pathways.
Main Results:
- Discovery and characterization of the 2-C-methyl-D-erythritol 4-phosphate pathway.
- Demonstration of IPP and DMAPP essentiality in bacteria despite mevalonate pathway absence.
Conclusions:
- The mevalonate-independent pathway is crucial for isoprenoid biosynthesis in most prokaryotes.
- This pathway represents a significant divergence from eukaryotic isoprenoid synthesis.
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