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火星生物基因组测序 精选

已有 5682 次阅读 2012-10-23 00:06 |个人分类:生物学|系统分类:观点评述| 基因组, 生物, 火星

基因组学领域有个家伙叫“J. Craig Venter”。这个家伙相当不一般。全世界众多科学家一起测人类基因组序列的时候,他拉出一帮人马单干,用新的策略很快就赶上了国际合作组的进度,最后他们的测序结果与国际合作组的测序结果一起发表在Science和Nature上。后来,这个家伙带领的团队又创造了第一种人造细菌基因组,开创了合成生物学。




The Scientist
Searching for Alien Genomes
J. Craig Venter plans to develop a machine to find and sequence DNA on Mars, but another genomics mogul, Jonathan Rothberg, may beat him to it.

By Jef Akst | October 22, 2012

J. Craig Venter and Jonathan Rothberg, two widely known geneticists, both hope to send a DNA sequencing machine to Mars that will be able to prove once-and-for-all whether life exists on the Red Planet.

"There will be DNA life forms there," Venter predicted last week (October 16) at the Wired Health Conference in New York, Technology Review reported. (Hear his comments in this video, starting at 00:11:01.)

Venter said that a collaboration between the J. Craig Venter Institute and his company, Synthetic Genomics, is developing the machine for the task and is doing test runs in the Mojave Desert. Eventually, the machine should be able to gather soil samples and isolate microbes, then sequence their DNA, and send the data back home to Earth.

Rothberg, founder of DNA sequencing company Ion Torrent, is working on making some alterations to the company’s "Personal Genome Machine" to reduce its size from 30 kilograms to just 3 kilograms, with the goal of putting it on a NASA rover, and prepare it for the trip to Mars. Aside from slimming the sequencer, Rothberg's team is making other alterations that make it fit for long-distance space travel, such as making the machine capable of withstanding heavy radiation. The effort is part of a Harvard-MIT collaboration funded by NASA and aimed at finding extraterrestrial genomes.

NASA isn’t scheduled to send another rover to the Red Planet until 2018 at the earliest, however, and even then, it's not certain that a DNA sequencing device would be along for the ride. But the argument for sending the machine to Mars, as opposed to just bringing home some soil samples, is contamination. If the samples are brought home and then analyzed, "no one would believe you," Tessi Kanavarioti, a chemist and Martian biologist, told Tech Review.

As for who will be the one to build the first Martian sequencer, only time will tell. "The hard thing about getting to Mars is hitting the NASA specifications," Harvard University’s George Church, a senior member of the Harvard-MIT team, told Tech Review. "[Venter] isn't ahead of anyone else."


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