Fig. 2: Cryo-EM structure of the MuB protomer in the helical filament.
From: Elucidating the Architectural dynamics of MuB filaments in bacteriophage Mu DNA transposition

a Domain architecture of the MuB protomer. b Three-dimensional structure of the MuB protomer. c Secondary structure topology of the MuB protomer. MuB is characterized by an additional α-helix (αextra) inserted between α2 and β2. d Representative 2D class of the ATP(+)-DNA(+)-MuB filament with the N-terminal domain (NTD) features. NTDs, DNA, and AAA+ modules are shown as yellow, red, and purple lines, respectively.