Fig. 2
From: Rpn11-mediated ubiquitin processing in an ancestral archaeal ubiquitination system
Crystal structure of the ubiquitin CsUb from the archaeon C. subterraneum. Sequence alignment (a) and structure comparison (b) of CsUb and H. sapiens Ub (HsUb; PDB 1D3Z). The five-stranded sheet (red) and the central helix (green) are highlighted. Residues that form important backbone (gray) or hydrophobic (yellow) interactions with CsRpn11 or AMSH are shown as sticks (see Fig. 3). In the alignment, identical (asterisks) and similar (colons) residues are indicated
