Preparation of Crude Cell Extract from Vibrio natriegens

Take a suspension of Vibrio natriegens, which has a high protein synthesis rate, in a chilled buffer to prevent cellular degradation.

Centrifuge under cold conditions.

Discard the supernatant to remove contaminants.

Resuspend the pellet in a small volume of chilled buffer.

Using a wide-bore tip, transfer the suspension into a microcentrifuge tube to prevent mechanical shearing.

Mix the suspension and place the tube in a holder positioned on ice.

Lower the sonicator tip into the suspension.

Initiate sonication to disrupt the cell membrane and release cytoplasmic contents.

Centrifuge to separate the insoluble cell debris.

Collect the supernatant or crude cell extract containing cytoplasmic contents into a fresh tube.

Flash freeze the cell extract in liquid nitrogen to preserve its bioactivity.

Store at ultra-low temperatures for further use in cell-free protein expression.

Cool freshly prepared S30 lysis buffer pH 7.7 to approximately four degrees Celsius, Use 10 milliliters of this cold S30 lysis buffer to re-suspend all pellets resulting from the same one litre culture and transfer suspension to a 50-milliliter tube. Centrifuge this suspension at 3,500 times g for 10 minutes at four degrees Ce