The Human Genome Project (HGP) – to put it simply – has changed science.
It has contributed to making biology the science of the 21st century, as physics was the science of the 20th century. It has driven advances in our understanding of biology at the cellular and molecular levels and provided new tools for medicine. It has led to routine genetic testing for many diseases including breast cancer and cystic fibrosis.
I see this as clearly now from the outside as I did during my 25 years of close association with the project.
As attested to on the HGP website, the projects goals were to:
- identify all the approximately 20,000-25,000 genes in human DNA;
- determine the sequences of the three billion chemical base pairs that make up human DNA;
- store this information in databases;
- improve tools for data analysis;
- transfer related technologies to the private sector; and
- address the ethical, legal and social issues that may arise from the project.
So how did it get from an idea stage to where it is today?
The project was stimulated, in part, by large-scale initiatives to win the second world war. Its initial proponents felt themselves to be the scientific descendants of the Manhattan Project – a research and development project that produced the first atomic bombs.
As with the Manhattan Project, Los Alamos Laboratory in New Mexico – constructed for the development of the atomic bomb – played a strong role in development of the Human Genome Project.
Having been recruited to Los Alamos in 1984, and ultimately leading its bioscience division from 1999 to 2004, I was witness to this exciting time in the history of biological research.
The HGP was officially founded in 1990 by the US Department of Energy’s Office of Health and Environmental Research – led for a period in the 1980s by the Boston University scientist Charles DeLisi – and was the culmination of many years of work and debate.
DeLisi had come to the Department of Energy from the National Institutes of Health (NIH) and had the view that understanding human susceptibility to environmental energy emissions could benefit from knowledge of the genome and genetic mutations linked to such susceptibility.
Following the workshop, the Office of Health and Environmental Research’s advisory committee recommended a major project to map the entire genome and identify all gene sequences.
While welcomed by some in the science community, there was considerable debate following this recommendation about whether the available technology for sequencing was either fast enough, or cheap enough for the ambitious goals of sequencing the three billion base pairs that make up the human genome.
And not just that: many scientists felt biology was the realm of the individual researcher and that such a large project would consume all the available research funding.
In this climate of controversy and grand vision came the first funding (US$13 million in the 1987 presidential budget) for the effort from the Department of Energy. Then, in 1990, the Human Genome Project was established formally as a joint project to be funded by the National Institutes of Health and the department.
Initial estimates put the project cost at US$3 billion and expected it to take 15 years.
The American biologist and entrepreneur Craig Venter and his company Celera Genomics entered the frame in 1998 and with private funding set up a competing human genome sequencing project in direct competition with the public project.
Venter’s innovation (that he hoped would allow the Celera project to go faster and cost an order of magnitude less that the public project) was to use “whole genome shot-gun sequencing”, previously used in sequencing smaller bacterial genome sequences but never applied to something as large as a human genome.
Venter’s team - then based in Rockville Maryland – broke the sequence into smaller parts. They then sequenced the ends of chromosomes and reassembled the sequence computationally by lining up the overlapping segments.
Competition was fierce and there was scepticism that Venter’s approach would lead to an accurate result. I also recall the intense public controversy over Venter’s proposal to seek patents on between 200 and 300 human genes, which the research community feared would “thwart promising genetic research by academics, as well as competitors”.
These fears were laid to rest on March 2000 when then-president Bill Clinton announced that the genome sequence should be made freely available to all researchers and could not be patented.
The statement resulted in a US$50 million loss in the biotechnology industry as Celera’s stock price plummeted.
A couple of months later – and five years ahead of schedule – the public and private projects jointly published the draft human genome sequence, a moment marked with a joint announcement by Bill Clinton and the then-UK prime minister Tony Blair.
This result was only possible thanks to the commitment and dedication of staff numerous universities and research centres throughout the United States and in the UK (with funds from the Wellcome Trust), as well as sites in France, Germany, Japan and China.
Into the noughties
In April 2003, the anniversary of James Watson and Francis Crick’s publication of the structure of DNA and their prediction of the chemical basis for DNA replication, the essentially finished version of the human genome sequence was celebrated.
As I wrote at the outset, the HGP has changed science. The extraordinary advances in sequencing technology that emerged from the project have led to databases of whole genome sequences of bacteria, viruses and fungi that are critically important for public health and biosecurity, including the HIV, influenza, and pathogen sequence databases.
The sequencing team in my division at Los Alamos was responsible for producing the draft and finished sequences of chromosome 16. This chromosome is made up of 90 million base pairs coding for more than 800 genes including genes linked to Batten’s disease, polycystic kidney disease, and inherited heart disease, which affects one in 500 young adults and can be fatal. We also contributed to finishing the sequencing of other chromosomes.
We felt the terror of knowing that the draft sequence had to be completed by a specific date because a prime minister and a president planned to make an announcement about it.
And we were subsequently held ransom to a later date reflecting the publication of the iconic scientific discovery 50 years earlier.
Were those pressures detrimental to our efforts? On the contrary, it’s a time I remember well and cherish greatly.