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bodynotdead
TrichodermaCultivator



Registered: 05/10/07
Posts: 271
Loc: U.S.A
Last seen: 15 years, 6 months
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artificial mushrooms
#7493668 - 10/07/07 07:12 AM (16 years, 3 months ago) |
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www.guardian.co I am creating artificial life, declares US gene pioneer October 6 2007
Craig Venter, the controversial DNA researcher involved in the race to decipher the human genetic code, has built a synthetic chromosome out of laboratory chemicals and is poised to announce the creation of the first new artificial life form on Earth.
The announcement, which is expected within weeks and could come as early as Monday at the annual meeting of his scientific institute in San Diego, California, will herald a giant leap forward in the development of designer genomes. It is certain to provoke heated debate about the ethics of creating new species and could unlock the door to new energy sources and techniques to combat global warming.
Mr Venter told the Guardian he thought this landmark would be "a very important philosophical step in the history of our species. We are going from reading our genetic code to the ability to write it. That gives us the hypothetical ability to do things never contemplated before".
The Guardian can reveal that a team of 20 top scientists assembled by Mr Venter, led by the Nobel laureate Hamilton Smith, has already constructed a synthetic chromosome, a feat of virtuoso bio-engineering never previously achieved. Using lab-made chemicals, they have painstakingly stitched together a chromosome that is 381 genes long and contains 580,000 base pairs of genetic code.
The DNA sequence is based on the bacterium Mycoplasma genitalium which the team pared down to the bare essentials needed to support life, removing a fifth of its genetic make-up. The wholly synthetically reconstructed chromosome, which the team have christened Mycoplasma laboratorium, has been watermarked with inks for easy recognition.
It is then transplanted into a living bacterial cell and in the final stage of the process it is expected to take control of the cell and in effect become a new life form. The team of scientists has already successfully transplanted the genome of one type of bacterium into the cell of another, effectively changing the cell's species. Mr Venter said he was "100% confident" the same technique would work for the artificially created chromosome.
The new life form will depend for its ability to replicate itself and metabolise on the molecular machinery of the cell into which it has been injected, and in that sense it will not be a wholly synthetic life form. However, its DNA will be artificial, and it is the DNA that controls the cell and is credited with being the building block of life.
Mr Venter said he had carried out an ethical review before completing the experiment. "We feel that this is good science," he said. He has further heightened the controversy surrounding his potential breakthrough by applying for a patent for the synthetic bacterium.
Pat Mooney, director of a Canadian bioethics organisation, ETC group, said the move was an enormous challenge to society to debate the risks involved. "Governments, and society in general, is way behind the ball. This is a wake-up call - what does it mean to create new life forms in a test-tube?"
He said Mr Venter was creating a "chassis on which you could build almost anything. It could be a contribution to humanity such as new drugs or a huge threat to humanity such as bio-weapons".
Mr Venter believes designer genomes have enormous positive potential if properly regulated. In the long-term, he hopes they could lead to alternative energy sources previously unthinkable. Bacteria could be created, he speculates, that could help mop up excessive carbon dioxide, thus contributing to the solution to global warming, or produce fuels such as butane or propane made entirely from sugar.
"We are not afraid to take on things that are important just because they stimulate thinking," he said. "We are dealing in big ideas. We are trying to create a new value system for life. When dealing at this scale, you can't expect everybody to be happy."
-------------------- "absolute power corrupts absolutely". Lord Acton,
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xhooliganx
Munky


Registered: 03/09/06
Posts: 900
Loc: reno, nevada
Last seen: 2 years, 8 months
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Re: artificial mushrooms [Re: bodynotdead]
#7493895 - 10/07/07 10:17 AM (16 years, 3 months ago) |
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wow that's pretty amazing. i'm gonna have to fallow this story closely
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fastfred
Old Hand



Registered: 05/17/04
Posts: 6,899
Loc: Dark side of the moon
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Re: artificial mushrooms [Re: xhooliganx]
#7494591 - 10/07/07 02:17 PM (16 years, 3 months ago) |
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It's not nearly as impressive as it sounds. They haven't created life at all. The press has either blown things out of proportion or Ventner has lost his mind making that claim.
People have been inserting foreign DNA into cells and having it function for a long time, it's nothing new. Just because the DNA is longer doesn't mean that they've "created life".
The fundamental problem to creating life is that DNA polymerase replicates DNA. Since polymerase is created by DNA you have a chicken and the egg problem. In order to use DNA and have it make a product like polymerase you first need polymerase to translate the DNA.
Venter hasn't created life at all. He's just stuck a big chunk of DNA into an already living cell and had it function.
Anyway, this post is kind of off topic. Mycoplasma is a bacterium, not any sort of fungi.
-FF
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MonChe
RevolutionaryMonkey



Registered: 08/16/06
Posts: 100
Loc: Canada
Last seen: 9 years, 10 months
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Re: artificial mushrooms [Re: fastfred]
#7495505 - 10/07/07 06:01 PM (16 years, 3 months ago) |
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This isn't just foreign DNA. What you are talking about is taking a piece of DNA from one place and 'blasting' it into another.
This piece of DNA that they will be 'blasting' into another creature is fully synthetic. Not stolen or borrowed but created.
-------------------- MonChe, Leading the monkeys against the tyranny of the apes in the Gorilla wars!
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fastfred
Old Hand



Registered: 05/17/04
Posts: 6,899
Loc: Dark side of the moon
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Re: artificial mushrooms [Re: MonChe]
#7497725 - 10/08/07 02:32 PM (16 years, 3 months ago) |
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Quote:
MonChe said: This isn't just foreign DNA. What you are talking about is taking a piece of DNA from one place and 'blasting' it into another.
This piece of DNA that they will be 'blasting' into another creature is fully synthetic. Not stolen or borrowed but created.
That's nothing new. They've done the same thing with synthetic viri. And portions of many inserts have been synthetic for quite some time. There is really no difference between natural and synthetic DNA so it is really no advance. The only new thing is the length of DNA they've spliced together from the tiny snippets of DNA they can create with an oglionucleotide synthesizer.
They've done the exact same thing with old, unviable flu viruses. They sequence them and recreate them from scratch. Then they insert them into a host cell and end up with the virus replicating and reproducing the same as the wild type. Of course viruses aren't technically alive, so they are trying to make this out like it's a major advance since they can claim that the bacteria they made is alive.
There are actually people working on creating real life from scratch, so I would hate to see misleading claims like this steal their thunder.
-FF
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rodfarva
-=-=-=-=-=-=-=====-----=-=-=-=-I



Registered: 07/31/07
Posts: 4,982
Last seen: 6 years, 10 months
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Re: artificial mushrooms [Re: fastfred]
#7499040 - 10/08/07 07:17 PM (16 years, 3 months ago) |
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Just get ready for the zombies friends
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Agave
Stranger

Registered: 08/29/07
Posts: 126
Last seen: 15 years, 9 months
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Re: artificial mushrooms [Re: rodfarva]
#7504102 - 10/10/07 02:08 AM (16 years, 3 months ago) |
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I agree that this may not be the most amazing scientific advancment, but it's also nothing to scoff at. I think the main significance of this accomplishment is what possibilities it opens up. Bacterium that feed on cancer, anyone...
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Tamadragon
Stranger



Registered: 02/29/04
Posts: 382
Loc: CAN
Last seen: 15 years, 3 months
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Re: artificial mushrooms *DELETED* [Re: Agave]
#7506502 - 10/10/07 06:19 PM (16 years, 3 months ago) |
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Post deleted by TamadragonReason for deletion: ---
-------------------- ~Tama Peace I get real lonely
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Gotdung
Stranger
Registered: 10/02/07
Posts: 7
Last seen: 16 years, 1 month
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Re: artificial mushrooms [Re: Tamadragon]
#7527555 - 10/17/07 12:30 PM (16 years, 3 months ago) |
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zombies.... *takes out a mallet* shawn of the dead style
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