This is a short piece on Biological Engineering ripped from another document I am writing.
‘We are now starting the century of biology’ - Craig Venter
‘This is a century of Biology. Physics has had its good time, but now, it’s going to be Biology’ - E.O. Wilson
It is said that Biology will lead the technology of the 21st Century. Behind this assertion are a set of new technologies and ideas that define the emerging field of Synthetic Biology, which essentially treats Biology as a problem of Engineering.
Synthetic Biology considers how biological machines can be made through genetic modification. An example would be expression of genes encoding arsenic-sensing and fluorescent proteins to create a new machine for detecting arsenic contamination. This has been possible for some time, but key to Synthetic Biology is that the biological parts and mechanisms by which parts are coupled are now being standardised and catalogued, so new biological machines can more easily be assembled. It is now rather simple (and with little background knowledge) to assemble parts from ever-growing catalogues into novel biological machines. Moreover, tools to simulate these machines emerging from Systems Biology allow their behaviour to be explored and tested computationally prior to assembly. Through these mechanisms Synthetic Biology provides the capacity to engineer novel biological machines. Future biological machines might include organisms able to rapidly and cheaply synthesise drugs or biofuels from basic raw materials, crops that produce pesticides appropriate to the pests that threaten them, new paints and fabrics, and very many other applications not yet anticipated.
A friend of mine even suggests that we might one day build tunnels like the Channel Tunnel that are supported by biological material grown inside, making going through "something like passing through a colon". Nice.
While there is much excitement around Synthetic Biology I do not believe all Biological Engineering will rely upon intelligent design (without capitals). Biology has previously been able to meet its needs through evolution. By the judicious application of appropriate selection pressure in the laboratory evolution can be directed towards desired endpoints. For certain problems this might require less insight and be more efficiently realised than designed solutions. Future Biological Engineering will likely come to exploit a combination of Synthetic Biology and directed evolution.
The coming century may well be one of Biology, but Biology thus far has mostly been concerned with understanding Life’s origins and operation. It is in its new form, as a discipline of Engineering, that Biology’s increased importance will be realised.