Extended Data Fig. 8: iFCCS spatial and temporal data shows transient clusters of correlated signal of mCherry-SKL and GFP-Pex13.
From: Peroxisome biogenesis initiated by protein phase separation
a, Percentage of peroxisomes with GXC(0 ms) > 0.5 for GFP-Pex13 and soluble mCherry (no SKL) (gray). The-data of GFP-Pex13 with mCherry-SKL import from Fig. 4j is shown for comparison (red). b, Spatial iFCCS data from six different peroxisomes in WT 50 min after Pex5 induction where distinct transient clusters of correlated signals are observed. Images measure 1.19 µm x 1.19 µm in size. c, Transient nature of individual clusters are observed in the decay and fluctuations of the cross-correlation over time between clusters in different peroxisomes (n = 27 peroxisomes). d, Gaussian distribution of NGFP-Pex13/NmCherry-SKL obtained by autocorrelating signal from the Pex13-GFP and SKL-mCherry channels, extracting a value from the pixel exhibiting the highest GXC(0) > 0.5 in each peroxisome from the Pex13 WT strain, 50 min after Pex5 induction. e, Bimodal Gaussian fit of GFP-Pex14 same as in panel d, for data obtained 90 min after Pex5 induction. f, Distribution of NPex13-488/NPex5-647 showing the ratio of Pex13 to Pex5 in Pex13-IDR and Pex13-S8 condensates. All pixels within a single condensate of Pex13-IDR-WT or Pex13-IDR-S8 with Pex5 partitioned within the condensate were analyzed. Gaussian fit parameters µ and σ listed with 95% confidence intervals in panels d,e and f. g, An alternative transmembrane intercalation model for peroxisomal cargo import.
