Enzyme-catalyzed proximity labeling (PL), also known as proximity-based labeling, is a laboratory technique that labels biomolecules, usually proteins or RNA, proximal to a protein of interest.[1] By creating a gene fusion in a living cell between the protein of interest and an engineered labeling enzyme, biomolecules spatially proximal to the protein of interest can then be selectively marked with biotin for pulldown and analysis. Proximity labeling has been used for identifying the components of novel cellular structures and for determining protein-protein interaction partners, among other applications.[2]
^Roux, Kyle J.; Kim, Dae In; Raida, Manfred; Burke, Brian (2012-03-19). "A promiscuous biotin ligase fusion protein identifies proximal and interacting proteins in mammalian cells". Journal of Cell Biology. 196 (6): 801–810. doi:10.1083/jcb.201112098. ISSN 0021-9525. PMC 3308701. PMID 22412018.
^Han, Shuo; Li, Jiefu; Ting, Alice Y (2018-06-01). "Proximity labeling: spatially resolved proteomic mapping for neurobiology". Current Opinion in Neurobiology. Neurotechnologies. 50: 17–23. doi:10.1016/j.conb.2017.10.015. ISSN 0959-4388. PMC 6726430. PMID 29125959.
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