Figure 1. Cryo-EM Imaging of a Catalytically Inactive Hsp104 Variant.
(A) ATPase activities of Hsp104 and Hsp104DWB without and with κ-casein stimulation. Averages of three independent measurements ± SD are shown.
(B and C) Determining the nucleotide occupancy in Hsp104DWB using (B) MANT-ATP and (C) BzATP crosslinking, respectively. Average number of bound nucleotide from at least three independent measurements ± SD is shown.
(D) Representative EM micrograph of Hsp104DWB hexamers embedded in vitreous ice (scale bar, 25 nm).
(E) Images of selected 2D classes from reference-free 2D classification.