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Protagonist Therapeutics is a biotechnology company pursuing the discovery and development of target oral peptides as well differentiated alternatives to antibodies, and also as new chemical entities (NCEs) against those targets and life threatening diseases for which suitable small molecule and/or biologic options are not available. Peptides typically suffer from limitations of poor proteolytic stability and therefore find scarce therapeutic utility that is largely limited to ‘injectable drugs’. Protagonist’s technology platform is aimed at overcoming these restrictions and expanding the scope of peptide therapeutics to address unmet needs. Specific emphasis is placed on identifying ‘orally stable’ scaffolds and/or engineering oral stability characteristics onto them. The platform has been optimized over the years and involves synergistic integration of rational drug design, diversity oriented computational tools, phage display libraries, recombinant peptide expression, ex vivo oral stability methods, and peptide/medicinal chemistry techniques. This activity has led to the identification of ‘privileged scaffolds’ with favorable oral stability characteristics. Furthermore, the technology platform is well suited both for de novo discovery against a target and optimization around a given chemical starting point.
Hoth Therapeutics, Inc. is a clinical-stage biopharmaceutical company focused on developing new generation therapies for unmet medical needs.
Xontogeny is a life sciences accelerator that collaborates with entrepreneurs, scientific founders and first-time CEOs to drive the successful development of their technologies to enable new treatment options for patients with serious disease.
Intrexon Corporation is a privately held synthetic biology company that employs modular DNA control systems to enhance capabilities, improve safety and lower cost in human therapeutics, protein production, industrial products, agricultural biotechnology, and animal science.
Kezar co-founder Christopher Kirk, Ph.D. began his work on the unique function of the immunoproteasome at Proteolix in 2005, while working on the compound that would become the successful multiple myeloma drug KYPROLIS™ (carfilzomib). As VP of Research at Onyx Pharmaceuticals, which acquired Proteolix in 2009, Christopher led the efforts to develop the first selective inhibitors of the immunoproteasome and designed multiple studies demonstrating their profound immunomodulatory effects. In parallel with this work, Christopher and Kezar co-founder Jack Taunton, Ph.D. collaborated on several research projects involving protein secretion. This collaboration inspired a belief in the strong synergies between protein degradation and protein secretion, two fertile areas for drug discovery with platform potential. In 2014, Christopher and Kezar co-founder John Fowler began developing the business plan for Kezar, acting on a longstanding desire to work together and build a world-class company. In 2015, John and Christopher raised $23M and negotiated a worldwide, exclusive license agreement with Amgen for the Onyx immunoproteasome inhibitor patent estate. Now underway, John and Christopher are excited to leverage their complementary skill sets to build Kezar into a leader in small molecule drug development.