Fig. 3

BpumGH48 Structure. a Cartoon representation of BpumGH48 structure with cellobiose and cellohexaose. α-helices are shown in red, β-strands in yellow and loops in green. The bound cellobiose molecule (CBI) is depicted as sticks with cyan carbons and red oxygens and the cellohexaose substrate (C6) is shown as sticks with gray carbons and red oxygens. b Comparison of surface loops between BpumGH48 and CelF GH48 (PDB code 1G9G). The overall structure of BpumGH48 is visualized using a green cartoon representation and the unusually large loops are colored blue. The cellobiose and cellohexaose molecules are shown as sticks with green carbons and red oxygen atoms. For CelF GH48 only a transparent surface is shown to highlight the differences. The unusually large loops of BpumGH48 are labeled from 1 to 8 to help with discussion