Nature research paper: The Smc5/6 complex is a DNA loop-extruding motor
. Intensity time trace of Smc5/6 depicted in showing one-step bleaching. Probability density functions of fluorescence intensities for from Alexa647 signal on labeled Smc5/6 and the background signal . Calculated propability of observing single bleaching steps as a function of dimer fraction given that we experimentally only observe one-step and two-step bleaching events. Red line shows the experimentally observed value shown in Fig.
, indicating that 90% of events are likely come from single Smc5/6 complexes Example kymographs of Smc5/6 on DNA in the presence of ATP showing diffusive and immobile characteristics. Example kymograph of Smc5/6 remaining bound to DNA in the presence of AMP-PNP. Mean square displacements of Smc5/6 complexes displaying directed motion corresponding to Fig., diffusive motion extracted from the kymograph shown in , and immobile behaviour corresponding to the kymograph in .
Mass distributions of pentameric and hexameric Smc5/6 complexes in different conditions, including no ligand , in the presence of DNA , ATP hydrolysis-deficient mutant with ATP and DNA , hexameric Smc5/6 with ATP and DNA . The identified peaks exhibit mass distributions close to the molecular weight of pentamer , single hexamer and dimer of hexamer . The inset panels show the zoom-in peak corresponding to the dimer of hexamers.
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