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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: Biochim Biophys Acta. 2013 Mar 16;1843(1):10.1016/j.bbamcr.2013.03.008. doi: 10.1016/j.bbamcr.2013.03.008

Figure 5. Proteasome biogenesis associated (Pba) factors 3 and 4.

Figure 5

A. The structure of the Pba3/4 dimer is similar to the structure of proteasome subunits. A representative α subunit is shown for comparison. Helices are indicated in red, β strands in yellow and loops in green.

B. The Pba3 (blue) and Pba4 (green) chaperone associates with the α5 subunit (purple) in such a manner that there is a steric clash with the β4 subunit (yellow) unless Pba3/4 disassociates before this subunit is incorporated into the CP.

These images were made using PyMol using structures elucidated in Refs [15, 69].