Expression of Human Uncoupling Protein-1 in Escherichia coli Decreases its Survival Under Extremely Acidic Conditions
Uncoupling protein-1 (UCP1), located at the inner membrane of mitochondria, is expressed primarily in brown adipose tissue and mediates the permeability of protons through the inner mitochondrial membrane. This research examines whether human UCP1 can uncouple oxidative phosphorylation in E. coli ....
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Veröffentlicht in: | Current microbiology 2022-03, Vol.79 (3), p.77-77, Article 77 |
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Sprache: | eng |
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Zusammenfassung: | Uncoupling protein-1 (UCP1), located at the inner membrane of mitochondria, is expressed primarily in brown adipose tissue and mediates the permeability of protons through the inner mitochondrial membrane. This research examines whether human UCP1 can uncouple oxidative phosphorylation in
E. coli
. Recombinant human UCP1 that includes an N terminus signal peptide for the bacterial inner membrane was expressed in
E. coli
. Our testing showed that UCP1 functions as a proton transporter in the bacterial membrane, increasing its permeability, decrease ATP synthesis at neutral pH and reducing the viability of
E. coli
in markedly acidic environments. These results suggest that UCP1 can uncouple oxidative phosphorylation in
E. coli
. The decreased acid resistance (AR) of
E. coli
with UCP1 expressed in the membranes confirmed that oxidative phosphorylation plays a role in AR through the pumping of protons to regulate the intracellular pH, and demonstrate that UCP1 can be used as an uncoupler protein for bacterial metabolic research. |
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ISSN: | 0343-8651 1432-0991 |
DOI: | 10.1007/s00284-022-02762-3 |