New Technologies for Transient Molecular Complex Characterization (STTR R41/R42) | Apply Online

Opportunity Summary:

The NIH funding opportunity "New Technologies for Transient Molecular Complex Characterization (STTR R41/R42)" (Funding Opportunity Number PA-08-111) is a discretionary grant program run through the National Center for Research Resources (CFDA 93.389). It is designed specifically for eligible small business concerns applying under the Small Business Technology Transfer (STTR) mechanism, meaning applicants are expected to pursue a research and development effort that formally partners a small business with a nonprofit research institution. The core intent is technology development rather than basic discovery: the program is looking for new or improved technologies, tools, and processes that make it possible to study transient molecular complexes, which are short-lived assemblies of biomolecules that form and dissociate quickly and can be difficult to capture with traditional methods.

Scientifically, the FOA focuses on the characterization of molecular complexes whose brief lifetimes make them hard to observe, yet whose formation is often central to normal cellular function and, in many cases, disease mechanisms. These transient complexes can be involved in signaling, regulation, molecular transport, enzymatic control, and other dynamic biological processes where timing and context matter. Because they are fleeting, they are often under-characterized compared to stable complexes, even though they may represent key control points that break down in disease or can be manipulated by drugs. The opportunity therefore encourages proposals that enable researchers to see these complexes more clearly and measure them more accurately, with the longer-term payoff being better insight into physiology, better understanding of dysfunction in disease states, and more efficient paths toward diagnostics or therapeutic interventions.

The FOA emphasizes two broad kinds of characterization that the proposed technologies should enable. First is structural characterization, including practical information such as stoichiometry (how many of each component is present), localization (where in the cell or tissue the complex forms), symmetry, and overall shape or architecture. Second is kinetic characterization, meaning the ability to measure how quickly complexes assemble and disassemble, how long they persist, and how these dynamics change in response to conditions such as mutations, stressors, or candidate therapeutic agents. In plain terms, the program is aiming to support capabilities that answer both "what is it when it forms?" and "how does it behave over time?" because both types of information are crucial for translating molecular observations into actionable biological and medical understanding.

From a funding and submission standpoint, the mechanism of support is explicitly STTR R41/R42, which covers Phase I, Phase II, and Fast Track applications. Phase I typically supports early proof-of-concept work and feasibility testing, Phase II supports further development and validation toward a usable product or platform, and Fast Track allows applicants to apply for Phase I and Phase II in a combined, continuous development plan. The FOA also notes that it runs in parallel with a companion announcement of identical scientific scope (PA-08-110) that supports the SBIR pathway (R43/R44). In practice, that parallel structure signals that NIH wanted to encourage small business-led technology development through either the STTR collaboration model or the SBIR model, depending on which best fits the team and commercialization plan.

Administratively, the opportunity was posted April 7, 2008, with an original and final closing date of May 7, 2011, and an archive date of June 7, 2011. There is no cost sharing or matching requirement listed, and eligibility is limited to small businesses. For applicants or readers who need the original full announcement text, the FOA points to the NIH Grants Guide page (http://grants.nih.gov/grants/guide/pa-files/PA-08-111.html). For access or linking issues, the contact provided is the NIH Office of Extramural Research webmaster (FBOWebmaster@OD.NIH.GOV), which reflects that the notice was distributed through NIH's standard grants communications channels.

Overall, PA-08-111 is best understood as a targeted technology-creation program: it is not simply funding research on transient complexes, but rather funding the development of the enabling methods and platforms that make those complexes measurable in ways that are structurally informative and kinetically meaningful. The underlying rationale is that improved measurement and characterization of these short-lived molecular interactions can unlock clearer views of normal biology, expose where and how disease processes go wrong, and provide practical leverage for developing diagnostics and therapies that act on the right molecular events at the right time.

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