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Scientists Plan to Create New Life Form

From:
http://www.washingtonpost.com/wp-dyn/articles/A17496-2002Nov20.html

Scientists Planning to Make New Form of Life

By Justin Gillis
Washington Post Staff Writer
Thursday, November 21, 2002; Page A01


Scientists in Rockville are to announce this morning that they plan to
create a new form of life in a laboratory dish, a project that raises
ethical and safety issues but also promises to illuminate the fundamental
mechanics of living organisms.

J. Craig Venter, the gene scientist with a history of pulling off unlikely
successes, and Hamilton O. Smith, a Nobel laureate, are behind the plan.
Their intent is to create a single-celled, partially man-made organism with
the minimum number of genes necessary to sustain life. If the experiment
works, the microscopic man-made cell will begin feeding and dividing to
create a population of cells unlike any previously known to exist.

To ensure safety, Smith and Venter said the cell will be deliberately
hobbled to render it incapable of infecting people; it also will be strictly
confined, and designed to die if it does manage to escape into the
environment.

More worrisome than the risk of escape, they acknowledged, is that the
project could lay the scientific groundwork for a new generation of
biological weapons, a risk that may force them to be selective about
publishing technical details. But they said the project could also help
advance the nation's ability to detect and counter existing biological
weapons.

The project, funded with a $3 million, three-year grant from the Energy
Department, will start as a pure scientific endeavor, but it could
eventually have practical applications. If Venter and his collaborators
manage to create a minimalist organism of the sort they envision, they will
attempt to add new functions to it one at a time -- conferring on it the
ability, for instance, to break down the carbon dioxide from power plant
emissions or to produce hydrogen for fuel.

The more immediate plan is to try to puzzle out, and eventually model in a
computer, every conceivable aspect of the biology of one organism, a feat
science has never come close to accomplishing. Because all living cells are
based on the same chemistry and bear striking resemblances to one another,
that could shed light on all of biology. "We are wondering if we can come up
with a molecular definition of life," Venter said. "The goal is to
fundamentally understand the components of the most basic living cell."

The project is not entirely new. Venter launched an earlier version of it in
the late 1990s while running a Rockville institute he founded called the
Institute for Genomic Research. With his collaborators, he got as far as
publishing a working list of the genes apparently required to sustain life
in a single-celled organism called Mycoplasma genitalium, the
self-replicating organism with the smallest known complement of genetic
material. That work indicated that under at least some laboratory
conditions, the organism could get by with only 300 or so of its 517 genes.
People, by contrast, have an estimated 30,000 to 50,000 genes.

The project fell by the wayside when Venter and Smith launched Celera
Genomics Corp., the Rockville company that raced publicly funded researchers
to a tie two years ago in compiling draft maps of the entire human genetic
complement, the genome.

Venter resigned from Celera early this year in a dispute over its future
direction. He is financing a series of new initiatives, including the
Institute for Biological Energy Alternatives, the entity that will house a
revived project to build the artificial organism. The $3 million Energy
Department grant, awarded recently, will pay for a staff of about 25 to
pursue the project over three years, though Venter and Smith acknowledged it
could take longer. Smith, widely considered one of the world's most skilled
scientists at manipulating DNA, will direct the laboratory work.

The project will begin with M. genitalium, a minuscule organism that lives
in the genital tracts of people and may cause or contribute to some cases of
urethritis, an inflammation of the urethra. The scientists will remove all
genetic material from the organism, then synthesize an artificial string of
genetic material, resembling a naturally occurring chromosome, that they
hope will contain the minimum number of M. genitalium genes needed to
sustain life. The artificial chromosome will be inserted into the
hollowed-out cell, which will then be tested for its ability to survive and
reproduce.

Ari Patrinos, a senior Energy Department administrator who will help oversee
the project, said the organism was an attractive starting point to create a
"minimal genome" because it is so minimal already. "We know even the
simplest of cells is incredibly complicated," Patrinos said -- too
complicated, at least so far, to understand completely. "This is a case
where we're trying to cheat a little bit, to take the smallest and simplest
and make it smaller and simpler."

The project raises philosophical, ethical and practical questions. For
instance, if a man-made organism proved able to survive and reproduce only
under a narrow range of laboratory conditions, could it really be considered
life? More broadly, do scientists have any moral right to create new
organisms?

A panel of ethicists and religious leaders, convened several years ago at
Venter's request, has already wrestled with the latter issue. The group,
which included a rabbi and a priest, concluded that if the ultimate goal was
to benefit mankind and if all appropriate safeguards were followed, the
project could be regarded as ethical.

"I'm less worried about the minimal genome project taking off and creating
some kind of monster bug than I would be, partly because I have a sense that
the scientists are aware of the possible risks of what they're doing," said
Mildred Cho, a bioethicist at Stanford University who was chairwoman of the
ethics panel. Scientists don't usually announce their experiments in
advance, but Venter said he felt this one needed to be brought to the
attention of policymakers in Washington, since it could create a new set of
tools that terrorists or hostile states might exploit to make biological
weapons. "We'll have a debate on what should be published and what
shouldn't," Venter said. "We may not disclose all the details that would
teach somebody else how to do this."

Venter and Smith acknowledged the theoretical risk of creating a new
disease-causing germ, but said they would take steps to ensure against that..
One of the first genes they'll delete is the one that gives M. genitalium
the ability to adhere to human cells. Many of the 200 genes to be deleted
will be ones that confer the ability to survive in a hostile environment, so
that the end result will be a delicate creature, at home only in the warm
nutrient bath of a laboratory dish.

Even if the organism were to escape stringent confinement and enter the
environment, Smith said, "it's a dead duck."

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