Cell-free protein expression (CFPE) systems offer a significantly faster alternative for rapid prototyping via linear DNA templates, bypassing the slower scaling required by traditional, cell-based expression systems. Generated quickly via PCR, linear templates enable researchers to efficiently modify, mutate, and optimize protein designs on the fly.

This protocol outlines a reliable, PCR-based method to assemble functional linear DNA templates directly from a target gene sequence.

  • Essential Components: The workflow integrates necessary regulatory elements—including a T7 promoter, ribosome binding site (RBS), and T7 terminator—alongside optional purification tags, into a single cohesive template.

  • Optimized Primer Assembly Strategy: Rather than utilizing excessively long primers in a single step, this protocol outlines a sequential PCR approach. By using shorter, transitional flanking sequences, researchers can reliably and cost-effectively append universal regulatory elements to any target gene.

By minimizing the standard bottlenecks of traditional cloning and DNA template preparation, this workflow provides a straightforward shortcut for accelerating cell-free protein expression experiments.