PbaB tetramer caps the heptameric α subunit ring of the 20S proteasome.
figure
posted on 2013-03-22, 05:27 authored by Kentaro Kumoi, Tadashi Satoh, Kazuyoshi Murata, Takeshi Hiromoto, Tsunehiro Mizushima, Yukiko Kamiya, Masanori Noda, Susumu Uchiyama, Hirokazu Yagi, Koichi KatoClass averages of the PbaB-20S proteasome complexes; (A) the 20S proteasome doubly capped with PbaB on both sides, (B) and (C) the 20S proteasome singly capped with PbaB on one side. Scale bar indicates 10 nm. Three-dimensional tomograms for the PbaB-20S proteasome complexes were obtained by the negative staining electron tomography; (D) parallel cap (n = 9), (E) tilted cap (n = 42). Seven-fold symmetrical operation is applied to the 20S proteasome part.
