Largest viral-protein library enables new research on emerging pathogens

On July 2, 2026, researchers from Harvard Medical School unveiled the largest viral-protein library, known as a viral ORFeome, which allows for unprecedented analysis of emerging pathogens. This groundbreaking tool promises to enhance our understanding of viral proteins and their impact on human health, paving the way for new vaccines and treatments.

Understanding the Viral ORFeome

The viral ORFeome, described in a recent article published in the journal Cell, contains approximately 13,000 DNA sequences coding for around 9,000 proteins from 513 different viruses. This includes well-known pathogens such as the Ebola virus and Zika virus. Senior author Stephen Elledge emphasized the library's ability to reveal how viruses manipulate human cells, stating, "This library reveals how viruses manipulate human cells on a scale that simply wasn't possible before."

By expanding access to biologists unfamiliar with virology, the ORFeome transforms the study of viruses from an individual focus to a broader understanding of the common strategies employed by various pathogens.

Implications for Vaccine and Treatment Development

The research team has already utilized the ORFeome to identify numerous viral proteins that interfere with immune responses. In a related paper published on July 9 in Science, they explored how viruses exploit cells' waste disposal systems to evade immune detection. This new knowledge could inform the design of therapies that target multiple viruses simultaneously.

Researchers can insert any of the 13,000 DNA constructs into cell cultures, instructing cells to produce individual viral proteins. This method allows scientists to explore how these proteins affect cellular functions, such as immune evasion and metabolic disruption.

Future Directions in Virology Research

The ORFeome not only provides a biosafe way to study individual viral proteins but also sets the stage for significant advancements in virology. As Caleb Glassman, a co-author of the study, noted, "This is a biosafe way to study viral proteins individually instead of studying a whole virus." This approach could lead to the development of vaccines and antiviral drugs that are more effective against a range of viral infections.

Additionally, a new ORF library called the eORFeome, reported in the same issue of Cell, includes nearly 4,000 sequences from viruses, bacteria, and parasites, further broadening the scope of viral research.