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Kim, Kwang-eun; Park, Isaac; Kim, Jeesoo; Kang, Myeong-Gyun; Choi, Won Gun; Shin, Hyemi; Kim, Jong-Seo; Rhee, Hyun-Woo; Suh, Jae Myoung
Nature communications, 09/2021, Letnik: 12, Številka: 1Journal Article
Abstract Secretory proteins are an essential component of interorgan communication networks that regulate animal physiology. Current approaches for identifying secretory proteins from specific cell and tissue types are largely limited to in vitro or ex vivo models which often fail to recapitulate in vivo biology. As such, there is mounting interest in developing in vivo analytical tools that can provide accurate information on the origin, identity, and spatiotemporal dynamics of secretory proteins. Here, we describe i SLET (in situ Secretory protein Labeling via ER-anchored TurboID) which selectively labels proteins that transit through the classical secretory pathway via catalytic actions of Sec61b-TurboID, a proximity labeling enzyme anchored in the ER lumen. To validate i SLET in a whole-body system, we express i SLET in the mouse liver and demonstrate efficient labeling of liver secretory proteins which could be tracked and identified within circulating blood plasma. Furthermore, proteomic analysis of the labeled liver secretome enriched from liver i SLET mouse plasma is highly consistent with previous reports of liver secretory protein profiles. Taken together, i SLET is a versatile and powerful tool for studying spatiotemporal dynamics of secretory proteins, a valuable class of biomarkers and therapeutic targets.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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