E. coli Alkaline Phosphatase Display on Phagemid Surfaces
Author Information
Author(s): Michael Weichel, Rolf Jaussi, Claudio Rhyner, Reto Crameri
Primary Institution: Swiss Institute of Allergy and Asthma Research (SIAF)
Hypothesis
The study investigates the efficiency of displaying E. coli alkaline phosphatase on phagemid surfaces using different fusion proteins.
Conclusion
The pJuFo technology allows for effective display of E. coli alkaline phosphatase in a native-like conformation on phagemid surfaces.
Supporting Evidence
- The Km value for PhoA displayed on pJuFo phagemids was found to be 11.2 µM.
- PhoA displayed via pIII was shown to be more effective than via pVIII.
- The study confirmed that only one copy of PhoA is displayed on each phagemid particle.
Takeaway
The researchers found a way to put a special enzyme from E. coli on the outside of tiny virus-like particles, which helps in studying how proteins interact.
Methodology
The study involved cloning the phoA gene into a phagemid vector and analyzing the kinetic parameters of the displayed enzyme.
Limitations
The study notes that the total yield and infectivity of phagemids decrease with increasing IPTG concentration.
Digital Object Identifier (DOI)
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