Fidelity DNA Synthesis via 3-Way Junctions IP
Sidewinder is a patented DNA assembly technology that uses removable "page number" DNA structures to enable the high-fidelity, seamless construction of complex genes and genomes. By separating assembly instructions from the final genetic sequence, it allows for the construction of long, highly complex DNA constructs, including those with high GC content or repeats, with a misconnection rate of only one in one million. This breakthrough supports advanced bioengineering for applications in medicine, agriculture, and synthetic organism design.
Overview
Sidewinder is a transformative DNA assembly technology that enables the highly accurate construction of long, complex genetic sequences. By introducing the conceptual equivalent of "page numbers" to DNA fragments, Sidewinder allows researchers to stitch together arbitrary numbers of short synthetic oligonucleotides into functional genes or entire genomes. This innovation overcomes a major historical bottleneck in synthetic biology, where the inability to accurately assemble long sequences has limited the ability to verify and improve AI-designed biological constructs.
Technical specifications
Sidewinder utilizes a unique DNA three-way junction (3WJ) mechanism to direct the assembly of DNA fragments. Unlike traditional methods that rely on the sequence information within the final product to guide assembly, Sidewinder employs a third, temporary "Sidewinder helix" that acts as an external guide. These guide sequences—the "page numbers"—protrude from the side of the DNA structure during assembly. Because these guides are physically separate from the final sequence, they can be highly optimized for assembly efficiency without altering the target genetic code. Once assembly is complete, these guide helices are seamlessly removed, resulting in a perfectly assembled, uninterrupted DNA double helix. This method achieves an exceptionally high fidelity, with a measured misconnection rate of approximately one in one million—a significant improvement over existing techniques.
Technology readiness level
The technology has reached the laboratory validation stage and has been demonstrated through the successful construction of complex, multi-fragment assemblies, including high GC-content sequences, repetitive sequences, and massive combinatorial libraries. Research findings regarding this method were published in a peer-reviewed journal in early 2025, confirming its capability for robust and accurate de novo DNA synthesis. As a patented,...
About California Institute of Technology
Caltech is a private, STEM-focused research university in Pasadena, notable for its small size, graduate intensity, and tightly integrated academic–research culture. Companies engage through shared user facilities for micro/nanofabrication and advanced instrumentation, prototyping shops, and contract mechanisms managed by experienced corporate‑partnership staff. An affiliated NASA laboratory, the Jet Propulsion Laboratory, and the surrounding Southern California aerospace and deep‑tech cluster provide unique pathways to mission‑driven engineering, rigorous testing, and specialized suppliers. Research here is backed by competitive federal funding from agencies such as NSF, NIH, DOE, NASA, and the Department of Defense. A dedicated technology transfer office streamlines IP protection, licensing, and startup formation, connecting innovators with investors and regional accelerators.
delivered to your inbox.