Human Genome Project Marks 10th Anniversary

Tanya Lewis, LiveScience Staff Writer

Date: 14 April 2013 Time: 02:00 PM ET

This month marks the 10-year anniversary of the Human Genome Project, a 13-year international effort to determine the sequence of the 3 billion "letters" in a human being's DNA.

The $3 billion project, led by the U.S. Department of Energy and the National Institutes ofHealth, began in 1990 and was completed on April 14, 2003. In the decade since then, scientists have achieved many important milestones in using genomic discoveries to advance medical knowledge.

Sequencing technology has vastly improved in recent years. Sequencing the first human genome cost about $1 billion and took 13 years to complete; today it costs about $3,000 to $5000 and takes just one to two days.

Probing genome function

But just knowing the sequence would be meaningless without a way to interpret it. So researchers found ways to study the genome’s function, by sequencing the genomes of 135 other organisms and surveying the global variation among human genomes.

Researchers compared the genome sequences of other animals, such as chimpanzees and platypuses, as well as other eurkaryotic organisms (those whose cells have a nucleus), such as yeast and flat worms. From this comparison, scientists could identify stretches of DNA that have remained largely unchanged over the course of evolution. Five to 8 percent of the human genome has been unchanged for thousands of years.

One of the more surprising findings is how little of the human genome (only 1.5 percent) actually encodes proteins, the molecular building blocks that perform most of the critical functions inside cells.

Continued:  http://www.livescience.com/28708-human-genome-project-anniversary.html