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Revision as of 12:51, 17 September 2008






Welcome to the Imperial 2008 iGEM project page. It's Wednesday, October 1 and a great day to read about an awesome iGEM project!




For the 2008 iGEM competition, the Imperial team is designing a biofabricator using the Gram-positive bacterium Bacillus subtilis as our chassis. We hope to exert fine control over its movement via a recently-discovered clutch mechanism, using light as our stimulus to localise the bacteria. We then intend to trigger production and secretion of a self-assembling biomaterial in a set 3D pattern.


3D bio-scaffold materials have many applications in tissue engineering. Our blue-sky aim is to synthesise a precise biofabricator that can accelerate tissue engineering processes, hence making a contribution to the field of regenerative medicine.

Overview of our planned system


Basic Circuit Diagram

This diagram gives an overview of how our system works. Initially, B. subtilis are motile and are not producing biomaterials. If we want to construct a bio-scaffold with an "I" shape in 3D, we shine a 3D hologram of the correct wavelength (red is used as an arbitrary example here) onto the growth medium.

Bacteria will sense that light and triggers start to produce a clutch molecule. This disengages the flagella from the motor quite quickly, rendering the subtilis stationary. Coupled with the clutch is a gene for expression for biomaterial synthesis. Should any individuals stray from the correct area, the clutch should disengage and material synthesis should stop.

We hope to build up our bio-scaffold material pixel by pixel in the defined area - the basis of our 3D biofabrication process.




Please continue on to our project pages - you may want to start with our >>> Project Specifications >>>...


Imperial's 2008 iGEM team has received sponsorship from a number of generous companies...


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