Posted by
CmdrTaco
on from the this-is-just-swell dept.
jrrl writes "USAToday is reporting that Craig Venter's research group has synthesized a virus from scratch and that it "became bioactive" (started reproducing). Particularly interesting is that it only took them two weeks to build, rather than several years that previous attempts had taken."
Thinking on the computer virus side I like this Hawking quote: "I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image."
-- Stephen Hawking
-- X(7): A program for managing terminal windows. See also screen(1).
Morals Schmorals
by
Pedrito
·
· Score: 4, Interesting
I don't really care about the morality of this. Frankly, from a scientific point of view: Cool! On the other hand, what does concern me was this quote:
The project was funded in part by the Department of Energy, which hopes to create microbes that would capture carbon dioxide in the atmosphere, produce hydrogen or clean the environment.
Okay, so let's assume we do something like this, with the perfectly innocent intention of cleaning up some level of carbon dioxide. Okay, well you're counting on the virus to reproduce, but what if it gets out of control? It eats up ALL the carbon dioxide. All the trees and plants suffocate and die, but that might not happen before the atmosphere goes up in flames since that carbon dioxide is being turned into hydrogen.
Maybe not a likely event, but my concerns are a bit more on the practical side. Frankly, I'm all for creating new forms of life and bringing back extinct ones, just for the coolness of it. I just hope we don't go doing something foolish, which we always seem to manage to do.
Uh... From scratch?
by
stienman
·
· Score: 4, Interesting
Please note that when they say, "From scratch" they mean that they created a synthetic genome (probably from portions of other genomes - I doubt they know enough about the base pair sequences to actually have done it base pair by base pair) and inserted it in a 'living' cell.
The cell then started reproducing. They didn't create the cell. They probably didn't design the genome as much as patch one together from other genomes (though they may have 'created' it - physically manufactured it)
They say it's safe because it only infects batceria. Unfortunately, humans depend on bacteria to survive, so it's not nearly as innocuous as one might like to think.
However, these are nano-machines that might do real work safely (cleaning up chemical toxins, etc) - I'm just worried about mutations and how they will develop. You can't create life and expect it to reproduce itself without change over time. Pretty soon it'll discover that human skin is much more plentiful than the chemical toxins it was eating, and it'll change its diet.
-Adam
Rainbow Six future scenario?
by
StandardCell
·
· Score: 4, Interesting
For those of you who have read Tom Clancy's Rainbow Six, you will know that Tom goes into detail not only about what certain individuals will do to bioengineer fatal viruses. Obviously this particular virus isn't much, but what about the radical elements in humanity? There are individuals willing to kill everything on earth in order to advance their political or religious ideology. If someone can engineer viruses this easily, what will happen when someone disgruntled and who doesn't care about himself, much less others, decide to design and manufacture a virus like this?
Thinking about it in slightly different terms, all societies attempt to limit the proliferation of highly destructive weapons among their populace because the arbitrary nature of people would guarantee their arbitrary misuse. Imagine a world where people could obtain nuclear weapons as easily as a box of ammunition. We'd already all be dead.
This is what makes this particular story quite fear-inducing. When we arrive at the point where we can easily contruct very deadly weapons, particularly with the subtlety of viruses, there should be very strict regulation and government supervision. I can only hope there will be a worldwide treaty to that effect. After all, would you want someone engineering a virulent strain of airborne type 4 Ebola because he or she has a beef with a government's ideology?
The bizzare genome of Phi X 174
by
MagnaMark
·
· Score: 4, Interesting
The specific virus that Venter et al synthesized is called Bacteriophage phiX174. They probably chose it because it has such a short genome.
In fact, it's genome is so short that at first it confused researchers. It's genome is shorter than it should be. That is, there are fewer codons in the genome than there are amino acids in the virus's proteins. Normally, there would need to be a 1:1 codon:amino-acid ratio.
This lead researchers to the amazing discovery that phiX174 contains "genes within genes" and "overlapping genes". (Link to Genetic Map of phiX174) In several instances, one gene is entirely contained within another gene. In another, there are two genes (A and A*) that overlap with "reading frames" that are off by one.
This discovery challenges notions of what a gene is. With this knowledge, you can't say that a gene is simply a particular region of DNA.
These overlapping genes also call attention to the improbability of the evolution of phiX174. Commonly when a genetic mutation occurs, one base changes. This could affect one amino-acid in the protein for which the gene codes. In phiX174's case, a single base mutation could change 2 amino-acids in 2 proteins. This means that the evolution of these proteins is interdependent. That two functional proteins evolved in this manner is absolutely extraordinary.
Of course, now that it has evolved that way, it gives phiX174 an advantage of genetic economy. It takes less energy to maintain and reproduce a shorter genome. So phiX174 gets more bang for it's genetic buck by overlapping genes in this way.
Re:Should we really be doing things like this?
by
f97tosc
·
· Score: 4, Interesting
At any rate, natural evolution proceeds at a slow rate, so the defending species has time to adapt.
Natural evolution is not slow for viruses; their genetic code does not have the copy-protection mechanisms of say mammals. That is why we have a new flu pop up every other year, or a SARS for that matter.
Anthrax, for example, implements a tricky chemical hack to breach animal cells and destroy them. Most animals are pretty defenseless against the special back door that antrax uses, and without it the anthrax bacteria would be no more harmful than a pimple. However, anthrax is a rather obscure organism that mostly lives in the dirt. The reason that animals haven't evolved a defense against its chemical attack is that it just doesn't spread that easily in a natural setting. If anthrax were contagious like a cold, animals would have evolved a defense against it long ago.
With all due respect I think you are contradicting yourself. When a patheogen spreads for natural or not so natural reasons, people may die. Some survive, the resistant genes thus become more common. There may even be mutations of strong resistance that start to spread.
When this process happens for natural reasons, you label it "evolving a defense", or "defending species having time to adapt". When it happens by an act of man, you think of it as man being caught "defenseless". Of course, in both cases the species start out as (relatively) defenseless, and end up with a better defense.
My whole point was that there seem to be no lab-made pahtogen worse than anything evolved in nature. As for spreading it by man, well, anthrax did get an assist by man. But the extent of that "outbreak" was miniscule next to the natural outbreaks that happen every year.
Unless somebody figures out how to make an artificial microbe that takes advantage of chemical processes that just aren't found in natural evolution. For example, the human body might not even be capable of attacking a hypothetical microbe that has a teflon or silicone-enhanced outer membrane.
Possibly. But then again, if such mechanisms were very successful, why did they not evolve for 4 billion years on a planet surface covered in silicon compounds. In general, it is very difficult for people in labs to compete with the lab which is our planet, and time-scales of millions or billions of years.
Slashdot Mirror
Thinking on the computer virus side I like this Hawking quote:
"I think computer viruses should count as life. I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image."
-- Stephen Hawking
X(7): A program for managing terminal windows. See also screen(1).
I don't really care about the morality of this. Frankly, from a scientific point of view: Cool! On the other hand, what does concern me was this quote:
The project was funded in part by the Department of Energy, which hopes to create microbes that would capture carbon dioxide in the atmosphere, produce hydrogen or clean the environment.
Okay, so let's assume we do something like this, with the perfectly innocent intention of cleaning up some level of carbon dioxide. Okay, well you're counting on the virus to reproduce, but what if it gets out of control? It eats up ALL the carbon dioxide. All the trees and plants suffocate and die, but that might not happen before the atmosphere goes up in flames since that carbon dioxide is being turned into hydrogen.
Maybe not a likely event, but my concerns are a bit more on the practical side. Frankly, I'm all for creating new forms of life and bringing back extinct ones, just for the coolness of it. I just hope we don't go doing something foolish, which we always seem to manage to do.
Please note that when they say, "From scratch" they mean that they created a synthetic genome (probably from portions of other genomes - I doubt they know enough about the base pair sequences to actually have done it base pair by base pair) and inserted it in a 'living' cell.
The cell then started reproducing. They didn't create the cell. They probably didn't design the genome as much as patch one together from other genomes (though they may have 'created' it - physically manufactured it)
They say it's safe because it only infects batceria. Unfortunately, humans depend on bacteria to survive, so it's not nearly as innocuous as one might like to think.
However, these are nano-machines that might do real work safely (cleaning up chemical toxins, etc) - I'm just worried about mutations and how they will develop. You can't create life and expect it to reproduce itself without change over time. Pretty soon it'll discover that human skin is much more plentiful than the chemical toxins it was eating, and it'll change its diet.
-Adam
For those of you who have read Tom Clancy's Rainbow Six, you will know that Tom goes into detail not only about what certain individuals will do to bioengineer fatal viruses. Obviously this particular virus isn't much, but what about the radical elements in humanity? There are individuals willing to kill everything on earth in order to advance their political or religious ideology. If someone can engineer viruses this easily, what will happen when someone disgruntled and who doesn't care about himself, much less others, decide to design and manufacture a virus like this?
Thinking about it in slightly different terms, all societies attempt to limit the proliferation of highly destructive weapons among their populace because the arbitrary nature of people would guarantee their arbitrary misuse. Imagine a world where people could obtain nuclear weapons as easily as a box of ammunition. We'd already all be dead.
This is what makes this particular story quite fear-inducing. When we arrive at the point where we can easily contruct very deadly weapons, particularly with the subtlety of viruses, there should be very strict regulation and government supervision. I can only hope there will be a worldwide treaty to that effect. After all, would you want someone engineering a virulent strain of airborne type 4 Ebola because he or she has a beef with a government's ideology?
The specific virus that Venter et al synthesized is called Bacteriophage phiX174. They probably chose it because it has such a short genome.
In fact, it's genome is so short that at first it confused researchers. It's genome is shorter than it should be. That is, there are fewer codons in the genome than there are amino acids in the virus's proteins. Normally, there would need to be a 1:1 codon:amino-acid ratio.
This lead researchers to the amazing discovery that phiX174 contains "genes within genes" and "overlapping genes". (Link to Genetic Map of phiX174) In several instances, one gene is entirely contained within another gene. In another, there are two genes (A and A*) that overlap with "reading frames" that are off by one.
This discovery challenges notions of what a gene is. With this knowledge, you can't say that a gene is simply a particular region of DNA.
These overlapping genes also call attention to the improbability of the evolution of phiX174. Commonly when a genetic mutation occurs, one base changes. This could affect one amino-acid in the protein for which the gene codes. In phiX174's case, a single base mutation could change 2 amino-acids in 2 proteins. This means that the evolution of these proteins is interdependent. That two functional proteins evolved in this manner is absolutely extraordinary.
Of course, now that it has evolved that way, it gives phiX174 an advantage of genetic economy. It takes less energy to maintain and reproduce a shorter genome. So phiX174 gets more bang for it's genetic buck by overlapping genes in this way.
At any rate, natural evolution proceeds at a slow rate, so the defending species has time to adapt.
Natural evolution is not slow for viruses; their genetic code does not have the copy-protection mechanisms of say mammals. That is why we have a new flu pop up every other year, or a SARS for that matter.
Anthrax, for example, implements a tricky chemical hack to breach animal cells and destroy them. Most animals are pretty defenseless against the special back door that antrax uses, and without it the anthrax bacteria would be no more harmful than a pimple. However, anthrax is a rather obscure organism that mostly lives in the dirt. The reason that animals haven't evolved a defense against its chemical attack is that it just doesn't spread that easily in a natural setting. If anthrax were contagious like a cold, animals would have evolved a defense against it long ago.
With all due respect I think you are contradicting yourself. When a patheogen spreads for natural or not so natural reasons, people may die. Some survive, the resistant genes thus become more common. There may even be mutations of strong resistance that start to spread.
When this process happens for natural reasons, you label it "evolving a defense", or "defending species having time to adapt". When it happens by an act of man, you think of it as man being caught "defenseless". Of course, in both cases the species start out as (relatively) defenseless, and end up with a better defense.
My whole point was that there seem to be no lab-made pahtogen worse than anything evolved in nature. As for spreading it by man, well, anthrax did get an assist by man. But the extent of that "outbreak" was miniscule next to the natural outbreaks that happen every year.
Unless somebody figures out how to make an artificial microbe that takes advantage of chemical processes that just aren't found in natural evolution. For example, the human body might not even be capable of attacking a hypothetical microbe that has a teflon or silicone-enhanced outer membrane.
Possibly. But then again, if such mechanisms were very successful, why did they not evolve for 4 billion years on a planet surface covered in silicon compounds. In general, it is very difficult for people in labs to compete with the lab which is our planet, and time-scales of millions or billions of years.
Tor