Fig. 7

Structural comparison of RdFucI with other l-FucIs. Superimposition of a active site and b substrate binding surface of RdFucI with EcFucI (PDB code: 1FUI), ApFucI (3A9R) and SpFucI (4C20). Close-up view of large conformational difference of α8–α9 loops from l-FucIs (left). c Partial sequence alignment for the α8–α9 loop region for the RdFucI and EcFucI, ApFucI, and SpFucI. d Electrostatic surface representation of RdFucI, EcFucI, ApFucI, and SpFucI. The deep substrate binding pocket and α8–α9 loop regions are indicated by orange- and black-dot lines, respectively. A metal binding site is indicated by a yellow asterisk