Notch receptors are clustered and trans-endocytosed by Delta ligand cells. Confocal micrograph of a Delta expressing cell (left) interacting with a Notch expressing cell (right). Following interaction with Delta (blue), cell surface Notch (yellow) is clustered at cell-cell interfaces. Notch extracellular domain is detected within Delta cells (green) indicative of trans-endocytosis. Endocytosis of ligand while bound to Notch may produce a force sufficient to pull Notch apart and activate signaling.
 
 
 
 
 
 

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Volume 8 issue 11 November 2007
Homodimerization antagonizes nuclear export of Survivin
D Engelsma, JA Rodriguez, A Fish, G Giaccone and M Fornerod

Supplemental Figure 1: Influence of NES mutation, cell line and N or C-terminal YFP-tagging on the subcellular localization of Survivin. (A) Subcellular localization of YFP-SurvivinL96A/L98A in MCF7 and HeLa cells. (B) Subcellular localization in MCF7 cells of YFP-SurvivinL96A and SurvivinL96A-YFP. Bar, 10 µm.

Figure 1 (.jpg)

Supplemental Figure 2: Influence of expression level on nucleocytoplasmic ratios of Survivin(1-109) and Survivin(1-142), carrying or not carrying the F101A/L102A mutation. Expression levels are approximated by cytoplasmic pixel intensities in arbritrary units (AU). Coefficients (coef) are from least sum of squares linear fits. For Survivin(1-109) the data is from one of two experiments also shown in Fig 5B.

Figure 2 (.jpg)

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