Fig. 1

Partial amino acid sequences and structures alignments of HJ5Nag with GH 20 GlcNAcases. Sequence names are shown with PDB IDs (except HJ5Nag) as follows: 1QBA (accession no. AAB03808), the GlcNAcase from S. marcescens [23]; 2GJX (accession no. AAD13932), the GlcNAcase from H. sapiens [24]; and 3GH4 (accession no. BAI63641), the GlcNAcase from Paenibacillus sp. [25]. Asterisks and number signs show the putative catalytic residues and ligand-binding residues, respectively. Dotted purple line shows the N-terminal domain of bacterial GlcNAcases (domain signature: IPR015882). Solid purple line shows the catalytic domain of GH 20 GlcNAcases (domain signature: IPR015883)