Model Construction and Library Design.
Using YASARA v13.4.21, a single molecule from hLYZ structure 1JWR was superimposed on the Ivyc-HEWL cocrystal structure 1GPQ,and the HEWL molecules were then deleted. The resulting hLYZ-Ivyc complex was energy minimized using the AMBER99 force field.
Six residues were selected for mutation based on the modeled interaction between hLYZ and E.coli Ivyc. A ConSurf bioinformatics analysis, using default parameters, scored the hLYZ residues at the interface between hLYZ and Ivy for evolutionary conservation. Poorly conserved residues were then examined for interactions with Ivyc. Residues V2, W34, and G37 have close packed van der Waals contacts at the binding interface. Residues K33, R41, and R115 have extensive hydrogen bonding with Ivyc