Continuous Hypermutation and Evolution of Luciferase Variants

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• Luciferases are crucial tools for bioimaging and biosensing.
• Current luciferase optimization methods are inefficient and labor-intensive, involving manual screening of mutant libraries.
• There is a need for streamlined and automated approaches to accelerate enzyme engineering.

Purpose of the Study:

• To develop a streamlined platform for luciferase engineering using continuous hypermutation.
• To eliminate the need for repetitive manual library generation in enzyme evolution.
• To engineer novel luciferase variants with enhanced performance.

Main Methods:

• Implementation of an orthogonal DNA replication (OrthoRep) system for continuous hypermutation of the GeNL luciferase.
• Short cycles of culturing and screening to evolve the enzyme.
• Characterization of novel luciferase variants in cell models.

Main Results:

• Successful evolution of GeNL luciferase variants using the OrthoRep system.
• Identification of new variants exhibiting improved light output with an inexpensive, noncognate luciferin.
• Demonstration of the engineered luciferases' utility in cell-based assays.

Conclusions:

• The OrthoRep system and continuous hypermutation provide a viable and efficient method for luciferase engineering.
• This approach significantly accelerates the development of bioluminescent reporters.
• The engineered luciferases show promise for advanced bioimaging and biosensing applications.