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Human strains of Staphylococcus aureus secrete two papain-like proteases, staphopain A and B. Avian strains produce another homologous enzyme, staphopain C. Animal studies suggest that staphopains B and C contribute to bacterial virulence, in contrast to staphopain A, which seems to have a virulence unrelated function. Here we present a detailed study of substrate preferences of all three proteases...
Methionyl aminopeptidases (MetAPs) are metallo-dependent proteases responsible for removing of N-terminal methionine residue of peptides and proteins during protein maturation and activation. In this report we use a comprehensive strategy to screen the substrate specificity of three methionyl aminopeptidases: Homo sapiens MetAP-1, Homo sapiens MetAP-2 and Escherichia coli MetAP-1. By utilizing a 65-membered...
Fasciola parasites (liver flukes) express numerous cathepsin L proteases that are believed to be involved in important functions related to host invasion and parasite survival. These proteases are evolutionarily divided into clades that are proposed to reflect their substrate specificity, most noticeably through the S 2 subsite. Single amino acid substitutions to residues lining this site,...
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