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Metabolic secrets in a ubiquitous enzyme
1Protein Engineering and Evolution Unit, Okinawa Institute of Science and Technology, Okinawa, Japan.
Trends in Biochemical Sciences
|April 17, 2026
Summary
Alkaline phosphatase (PhoA) can oxidize phosphite, revealing a new metabolic role. This enzyme
Area of Science:
- Biochemistry
- Enzymology
- Metabolic pathways
Background:
- Alkaline phosphatase (PhoA) is a widely distributed enzyme.
- PhoA is known for its catalytic versatility.
- The metabolic roles of PhoA are extensively studied.
Purpose of the Study:
- To investigate the potential of alkaline phosphatase (PhoA) to oxidize phosphite.
- To explore a novel metabolic function for PhoA.
- To understand the implications of enzymatic multifunctionality in microbial metabolism.
Main Methods:
- Biochemical assays to measure phosphite oxidation by PhoA.
- Enzyme kinetics studies to determine efficiency.
- Bioinformatic analysis to assess PhoA distribution and conservation.
Main Results:
- PhoA demonstrates the ability to oxidize phosphite.
- The catalytic efficiency of PhoA for phosphite oxidation is relatively low.
- PhoA is globally distributed and highly conserved across species.
Conclusions:
- PhoA possesses a previously unrecognized metabolic role in phosphite oxidation.
- Despite low efficiency, PhoA's abundance suggests a significant impact on environmental phosphite turnover.
- Enzymatic multifunctionality is a key factor in understanding microbial metabolic networks.
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