Cell-Free Protein Expression Using a Bacterial Crude Cell Extract

A cell-free protein expression system uses a bacterial crude cell lysate, which contains the molecular machinery essential for in vitro transcription and translation.

This lysate includes transcription factors, ribosomes, and transfer RNAs (tRNAs).

Add a mix containing a DNA template, the RNA polymerase, nucleotides, and amino acids to the lysate.

Transfer it to a PCR plate and centrifuge to collect the liquid sticking to the walls. Seal the plate to prevent evaporation.

Incubate in a thermal cycler at an optimal temperature to support cell-free protein expression.

The transcription factor associates with the RNA polymerase to form a complex that binds to the template DNA.

This complex catalyzes RNA synthesis, incorporating nucleotides to generate a messenger RNA (mRNA).

The mRNA recruits ribosomes, which initiate translation, during which tRNAs deliver the corresponding amino acids to form a polypeptide chain.

The polypeptide folds into a functional protein, ready for downstream applications.

To perform cell-free protein expression using DNA template thaw 10X energy solution master mix, 4X amino acid master mix aliquots, and DNA template at room temperature. Then remove the T7 RNA polymera