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2015 ; 12
(12
): 2121-30
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Machine-Learning-Based Analysis in Genome-Edited Cells Reveals the Efficiency of
Clathrin-Mediated Endocytosis
#MMPMID26387943
Hong SH
; Cortesio CL
; Drubin DG
Cell Rep
2015[Sep]; 12
(12
): 2121-30
PMID26387943
show ga
Cells internalize various molecules through clathrin-mediated endocytosis (CME).
Previous live-cell imaging studies suggested that CME is inefficient, with about
half of the events terminated. These CME efficiency estimates may have been
confounded by overexpression of fluorescently tagged proteins and inability to
filter out false CME sites. Here, we employed genome editing and machine learning
to identify and analyze authentic CME sites. We examined CME dynamics in cells
that express fluorescent fusions of two defining CME proteins, AP2 and clathrin.
Support vector machine classifiers were built to identify and analyze authentic
CME sites. From inception until disappearance, authentic CME sites contain both
AP2 and clathrin, have the same degree of limited mobility, continue to
accumulate AP2 and clathrin over lifetimes >?20 s, and almost always form
vesicles as assessed by dynamin2 recruitment. Sites that contain only clathrin or
AP2 show distinct dynamics, suggesting they are not part of the CME pathway.
|*Genome, Human
[MESH]
|*Support Vector Machine
[MESH]
|Adaptor Protein Complex 2/genetics/*metabolism
[MESH]