After her Ph.D., she held
research fellowships in molecular biology at the
Massachusetts General Hospital and in genetics at Harvard Medical School. and of 134 according to
Scopus.
Research on ribozyme structure and function Early in her scientific career, Doudna worked to uncover the structure and biological function of
RNA enzymes or
ribozymes. She left
Genentech after two months and returned to Berkeley with the help of colleague
Michael Marletta, canceling all of her obligations to study
CRISPR. Doudna holds the
Li Ka Shing Chancellor's Professorship in Biomedicine and Health, and is the chair of the Chancellor's Advisor Committee on Biology. In 2012, Doudna and her colleagues made a new discovery that reduces the time and work needed to edit genomic DNA. Their discovery relies on a protein named
Cas9 found in the
Streptococcus bacterial "CRISPR" immune system that cooperates with guide RNA and works like scissors. The protein attacks its prey, the DNA of viruses, and slices it up, preventing it from infecting the bacterium. This system was first discovered by
Yoshizumi Ishino and colleagues in 1987 and later characterized by
Francisco Mojica, but Doudna and
Emmanuelle Charpentier showed for the first time that they could use different RNAs to program it to cut and edit different DNAs. Their discovery has since been further developed by many research groups Doudna supports the usage of CRISPR in somatic gene editing, gene alterations which do not get passed to the next generation, but not germline gene editing. The CRISPR system created a new straightforward way to edit DNA and there was a rush to patent the technique. UC Berkeley appealed on grounds that they had clearly discussed and spelled out how to do the application the Broad had pursued. In September 2018, the appeals court decided in favor of the Broad Institute's patent. Meanwhile, UC Berkeley and co-applicants' patent to cover the general technique was also granted. To further cloud the issue, in Europe the claim of the Broad Institute, to have initiated the research first, was disallowed. Doudna cofounded Caribou Biosciences, a company to commercialize CRISPR technology, in 2011. In September 2013, Doudna cofounded
Editas Medicine with Zhang and others despite their legal battles, but she quit in June 2014; Charpentier then invited her to join
CRISPR Therapeutics, but she declined following the "divorce"-like experience at Editas. Doudna is also a cofounder of Caribou spin-off
Intellia Therapeutics and Scribe Therapeutics, which pioneered CasX, a more compact, next-generation Cas9 which can efficiently cut DNA. In 2017, with
Samuel H. Sternberg, she co-authored
A Crack in Creation: Gene Editing and the Unthinkable Power to Control Evolution, In addition to the CRISPR breakthrough, Doudna has discovered that the
hepatitis C virus utilizes an unusual strategy to synthesize viral proteins. "I have so much optimism about what CRISPR can do to help cure unaddressed genetic diseases and improve sustainable agriculture, but I'm also concerned that the benefits of the technology might not reach those who need it most if we're not thoughtful and deliberate about how we develop the technology," Doudna said.
Mammoth Biosciences In 2017, Doudna co-founded
Mammoth Biosciences, a San Francisco-based bioengineering tech startup. Initial funding raised $23 million, with a series B round of funding in 2020 raising $45 million. The business is focused on improving access to bio sensing tests which address "challenges across healthcare, agriculture, environmental monitoring, biodefense, and more." This center processed over 500,000 patient samples from UC Berkeley students, staff and faculty as well as members of the surrounding community and farm workers in the Salinas area. Mammoth Biosciences announced a peer-reviewed validation of a rapid, CRISPR-based point of need COVID-19 diagnostic which is faster and less expensive than
qRT-PCR based tests.
Other activities She is also the founder and chair of the governance board of the Innovative Genomics Institute, which she co-founded in 2014. In 2025, a new
supercomputer named after Doudna was announced for the
National Energy Research Scientific Computing Center at LBNL, intended as the successor to the
Perlmutter supercomputer. Doudna is on the scientific advisory boards of the companies that she cofounded, such as Caribou, Intellia, Mammoth, and Scribe; as well as others such as
Altos Labs,
Isomorphic Labs,
Johnson & Johnson, Synthego,
Tempus AI, and
Welch Foundation. She joined
Sixth Street Partners in 2022 as its chief science advisor, to guide investment decisions related to CRISPR. == Personal life ==