Supplement for Optically Gated Discovery of Protein-Biomolecule Interactions project.

Geri实验室研究的总体目标是使用发现技术绘制蛋白质相互作用组， 在时空分辨率上提供了超过当前技术水平的数量级的改进。 这项工作的动机是，推进蛋白质相互作用组发现技术的解决方案， 里程碑，如单细胞和单蛋白阈值，将产生类似于类似的领域范围的影响。 转录组学和显微镜的进展。我们的统一方法，通过R35 MIRA奖资助， 结合了光催化邻近标记，其中光动力催化剂附着在亲和手柄驱动器上， 合成亲和探针与附近蛋白质的交联，具有图案化光和相互作用门控 激活以同时实施多个维度的特异性。在实验室工作的第一年， 我们的工作主要集中在两个方面：（1）高通量地发现内源性肽结合靶点， (2)单细胞分辨空间相互作用组学。内源性肽代表蛋白质的主要部分， 这些物质在人类细胞中存在，但它们的生物功能的机制实际上尚未被探索。一 我们的工作重点是将光催化邻近标记与快速离子迁移蛋白质组学相结合，以建立它们的 受体，绘制肽组和蛋白质组之间的界面。这项工作的关键是有效的 催化剂-肽缀合物的合成。我们证明了多达10个缀合物的制备和分离 使用质量导向制备型HPLC，每年可支持多达800个目标ID实验， 通过光催化标记和蛋白质组学证明了肽靶ID。我们的工作是开发空间 相互作用组学技术也取得了实质性进展。我们已经建立了定制的硬件，软件， 试剂，并使用这些来展示机器视觉引导的图案化照射和光催化蛋白质 以单细胞分辨率标记扁桃体中的CD 3+细胞。这些项目以及R35范围内的未来工作 MIRA奖，需要大量的常规和高通量的有机合成和纯化， 中间体和最终产品需要制备质量导向HPLC。在原始的R35 MIRA应用程序中 我们建议使用，并且在第一年的奖励活动中，我们使用了制备型HPLC-MS（沃茨 AutoPurification System 2000 Series）。然而，该组（Tri-I TDI）是 从威尔康奈尔医学院搬到洛克菲勒大学，这种仪器将不再可用。 由于他们离开该机构的意外性质，以及缺乏任何类似的文书， Weill Cornell Medicine的核心设施或PI领导的实验室，我们正在申请补充资金，以购买 更换仪器（新的沃茨自动纯化系统），成本不到25万美元。我们 申请资助仪器和必要配件的全部费用，表明目前的赠款 Geri实验室的支持不足以在没有行政补充的情况下购买仪器，并且 有足够的资金来支持、维护和操作要购买的仪器。

The overall goal of research in the Geri lab is to map protein interactomes using discovery technologies that provide orders of magnitude improvements in spatiotemporal resolution over the current state-of-the-art. The motivation for this work is that advancing the resolution of protein interactome discovery technology beyond key milestones, such as single cell and single protein thresholds, will have a field-wide impact analogous to similar advances in transcriptomics and microscopy. Our unified approach, funded through a R35 MIRA award, combines photocatalytic proximity labeling, in which light-powered catalysts attached to an affinity handle drive the crosslinking of synthetic affinity probes with nearby proteins, with patterned light and interaction-gated activation to simultaneously enforce multiple dimensions of specificity. The first year of work in the lab has focused on two of our proposed aims: (1) high throughput discovery of endogenous peptide binding targets, and (2) single-cell resolved spatial interactomics. Endogenous peptides represent a major fraction of proteinaceous matter in human cells, but the mechanisms powering their biological functions remain virtually unexplored. One thrust of our work merges photocatalytic proximity labeling with rapid ion-mobility proteomics to establish their receptors, mapping the interface between the peptidome and the proteome. Key to this effort is the efficient synthesis of catalyst-peptide conjugates. We demonstrated the preparation and isolation of up to ten conjugates in 3 hours using mass directed prep HPLC, which can support up to 800 target ID experiments per year, and demonstrated peptide target ID through photocatalytic labeling and proteomics. Our work to develop spatial interactomics technology has also made substantial progress. We have built bespoke hardware, software, and reagents and used these to demonstrate machine vision-guided patterned irradiation and photocatalytic protein labeling of CD3+ cells in tonsil at single-cell resolution. These projects, and future work in the scope of the R35 MIRA award, entails significant of routine and high throughput organic synthesis and purification, with many intermediates and final products requiring preparatory mass directed HPLC. In the original R35 MIRA application we proposed to use, and during the first year of award activities we have used, a prep HPLC-MS (Waters AutoPurification System 2000 Series) owned by a neighboring laboratory. However, this group (Tri-I TDI) is moving from Weill Cornell Medicine to Rockefeller University, and this instrument will no longer be available. Due to the unexpected nature of their departure from the institution and the lack of any equivalent instrument in a core facility or PI-led laboratory at Weill Cornell Medicine, we are requesting supplemental funding to purchase a replacement instrument (a new Waters AutoPurification System), which costs less than $250,000. We are requesting funding for the entire cost of the instrument and necessary accessories, show that current grant support of the Geri lab is insufficient to purchase the instrument without an administrative supplement, and that sufficient funding is available to support, maintain, and operate the instrument to be purchased.