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We developed RNA editing-mediated noncanonical amino acids protein tagging (RENAPT) for site-specific labeling of endogenous proteins in living cells. This method allows temporary, nonheritable protein tagging without protospacer adjacent motif sequence limitations.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Overexpression artifacts limit traditional protein tagging methods.
  • Genome editing enables endogenous protein tagging but has limitations.
  • Site-specific labeling is crucial for studying protein localization and function.

Purpose of the Study:

  • To establish a novel method for site-specific endogenous protein labeling in living cells.
  • To overcome limitations of existing protein tagging techniques, such as overexpression and protospacer adjacent motif dependence.
  • To enable real-time imaging and functional studies of endogenous proteins.

Main Methods:

  • Development of RNA editing-mediated noncanonical amino acids protein tagging (RENAPT).
  • Utilizing fluorescent or bio-orthogonal noncanonical amino acids for labeling.
  • Application in diverse cell types, including primary neurons.

Main Results:

  • RENAPT enables temporary and nonheritable site-specific labeling of endogenous proteins.
  • The method is independent of protospacer adjacent motif sequences.
  • Successful imaging of various endogenous proteins at specific subcellular locations.
  • Simultaneous tagging of two different proteins using distinct noncanonical amino acids.
  • Real-time labeling of ion channels and neuron-specific proteins in primary neurons.

Conclusions:

  • RENAPT is a versatile and broadly applicable platform for endogenous protein tagging in living cells.
  • This technique facilitates the study of protein localization and function without overexpression artifacts.
  • RENAPT offers a promising approach for advanced cellular and molecular research.