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. 2015 Jul 17;10:36. doi: 10.1186/s13062-015-0066-5

Fig. 1.

Fig. 1

Structure of the UBR-box (a) UBR-box from human UBR1 (PDB identifier 3NY1_A) (b) UBR-box from S. cerevisiae UBR1 (PDB identifier 3NIH_A). The structures have been colored from the N- to C-terminal in a gradient of blue to red. The zinc-chelating residue which displays circular permutation in S. cerevisiae UBR-box with respect to the human UBR-box is marked with a dotted circle. The shared metal-chelating residue is indicated by a red arrow