Yale University
Yale University

Pearl Bio

Yale University
We combine biologic- and chemical-based drug development in a single platform to precisely engineering multifunctional drugs

Stage

Preferred Financing (Series A or later)

Sectors

Life Sciences

Team Members

Farren Isaacs, PhD / Amy Cayne Schwartz, JD / Michael Jewett, PhD (11.2022)

Seeking

Connections/Feedback
Funding

Added Info

Contact

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[Update (8.2023): The company raised $4.11 million of seed funding from Khosla Ventures on October 7, 2021] Pearl Bio is an early-stage venture pioneering design and production of next-generation therapeutics and biomaterials for medical applications and beyond. Biology is constrained to the 20 natural amino acids, limiting the ability to site-specifically modify therapeutic proteins to improve half-life, tissue targeting, or assembly. In contrast, chemical synthesis of therapeutics enables access to greater functional diversity, but template-directed synthesis is challenging. Pearl Bio unites the precision of biology with the unlimited diversity of chemistry in a transformative platform that produces therapeutics and biomaterials with tunable properties for applications in oncology, immunology, and rare disease.

Problem & Market Focus

The landscape of the drug discovery industry is constantly evolving: in 2010, the top 10 grossing drugs were small molecules, whereas by 2015, the top 10 grossing drugs were proteins/biologics, owing to their comparatively higher binding selectivity and specificity. Due to this evolution, the development of protein-based therapeutics has earned heightened importance. However, while protein-based therapeutics are precise and allow for template-directed protein production, they are limited to 20 amino acids, limiting the diversity of new drugs that can be developed from surgical modifications to the protein. Chemically synthesized drugs, on the other hand, provides for the generation of polymers with unlimited diversity. The need for a drug platform that unites the diversity of chemistry and the precision of biologics to create sequence-defined polymers that are chemically diverse and tunable is clear: the global protein therapeutics market totaled $140B in 2016, and forecast to reach $217B by 2023.

Technology & Value Proposition

Pearl Bio has developed a drug synthesis platform that allows tunable, template-directed synthesis of protein therapeutics. The biologic is first expressed in the Pearl Platform, which then genetically encodes and produces new types of protein polymers that can be subsequently and easily modified using click-chemistry. For example, facile fatty-acylation of the newly-encoded polymer can improve its half-life properties. Importantly, the platform allows for the introduction of many new chemical moieties with high yield and purity, all necessary for functionalization and production of protein biologics. This platform distinguishes itself by its ability to functionalize multiple different amino acids (AAs), make multiple modifications per polymer, and incorporate more exotic monomers using engineering ribosomes. It also provides for cell-free synthesis of biomaterials with multi-site AA and synthetic monomer incorporations at high yields, increasing the robustness of the platform further above its competitors.

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