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On the Origin of Isoprenoid Biosynthesis
Yosuke Hoshino1, Eric A Gaucher1,2,3
1School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA.
The mevalonate pathway, crucial for isoprenoid biosynthesis, shows a complex evolutionary history. A potential version in Candidate Phyla Radiation (CPR) suggests ancient origins and links between archaea and CPR.
Area of Science:
- Biochemistry
- Evolutionary Biology
- Microbial Genomics
Background:
- Isoprenoids are vital organic compounds found across all life domains.
- Two main pathways, mevalonate and methylerthritol 4-phosphate, generate isoprenoids.
- Understanding isoprenoid pathway evolution is key to early life studies.
Purpose of the Study:
- To perform a detailed phylogenetic analysis of mevalonate pathway enzymes.
- To elucidate the evolutionary history of the mevalonate pathway.
- To investigate the presence and role of this pathway in Candidate Phyla Radiation (CPR).
Main Methods:
- Phylogenetic analysis of mevalonate pathway enzymes.
- Comparative genomics across different domains of life.
- Bioinformatic analysis of microbial genomes.
Main Results:
- A potential mevalonate pathway identified in the CPR superphylum.
- Evidence suggests a strong evolutionary link between archaea and CPR.
- CPR exhibits characteristics of both bacterial and archaeal mevalonate pathways.
Conclusions:
- The mevalonate pathway has ancient origins across life's domains.
- Its evolution is more complex than previously understood.
- CPR may hold signatures of the ancestral isoprenoid biosynthesis pathway.
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