Stochastic optical reconstruction microscopy–based relative localization analysis (STORM-RLA) for quantitative nanoscale assessment of spatial protein organization
R Veeraraghavan, RG Gourdie - Molecular biology of the cell, 2016 - Am Soc Cell Biol
Molecular biology of the cell, 2016•Am Soc Cell Biol
The spatial association between proteins is crucial to understanding how they function in
biological systems. Colocalization analysis of fluorescence microscopy images is widely
used to assess this. However, colocalization analysis performed on two-dimensional images
with diffraction-limited resolution merely indicates that the proteins are within 200–300 nm of
each other in the xy-plane and within 500–700 nm of each other along the z-axis. Here we
demonstrate a novel three-dimensional quantitative analysis applicable to single-molecule …
biological systems. Colocalization analysis of fluorescence microscopy images is widely
used to assess this. However, colocalization analysis performed on two-dimensional images
with diffraction-limited resolution merely indicates that the proteins are within 200–300 nm of
each other in the xy-plane and within 500–700 nm of each other along the z-axis. Here we
demonstrate a novel three-dimensional quantitative analysis applicable to single-molecule …
The spatial association between proteins is crucial to understanding how they function in biological systems. Colocalization analysis of fluorescence microscopy images is widely used to assess this. However, colocalization analysis performed on two-dimensional images with diffraction-limited resolution merely indicates that the proteins are within 200–300 nm of each other in the xy-plane and within 500–700 nm of each other along the z-axis. Here we demonstrate a novel three-dimensional quantitative analysis applicable to single-molecule positional data: stochastic optical reconstruction microscopy–based relative localization analysis (STORM-RLA). This method offers significant advantages: 1) STORM imaging affords 20-nm resolution in the xy-plane and <50 nm along the z-axis; 2) STORM-RLA provides a quantitative assessment of the frequency and degree of overlap between clusters of colabeled proteins; and 3) STORM-RLA also calculates the precise distances between both overlapping and nonoverlapping clusters in three dimensions. Thus STORM-RLA represents a significant advance in the high-throughput quantitative assessment of the spatial organization of proteins.
Am Soc Cell Biol