Cancer Institute A national cancer institute
designated cancer center

Matthew Bogyo

Publication Details

  • Substrate specificity of Staphylococcus aureus cysteine proteases - Staphopains A, B and C BIOCHIMIE Kalinska, M., Kantyka, T., Greenbaum, D. C., Larsen, K. S., Wladyka, B., Jabaiah, A., Bogyo, M., Daugherty, P. S., Wysocka, M., Jaros, M., Lesner, A., Rolka, K., Schaschke, N., Stennicke, H., Dubin, A., Potempa, J., Dubin, G. 2012; 94 (2): 318-327


    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. The specificity of staphopain A, B and C substrate-binding subsites was mapped using different synthetic substrate libraries, inhibitor libraries and a protein substrate combinatorial library. The analysis demonstrated that the most efficiently hydrolyzed sites, using Schechter and Berger nomenclature, comprise a P2-Gly↓Ala(Ser) sequence motif, where P2 distinguishes the specificity of staphopain A (Leu) from that of both staphopains B and C (Phe/Tyr). However, we show that at the same time the overall specificity of staphopains is relaxed, insofar as multiple substrates that diverge from the sequences described above are also efficiently hydrolyzed.

    View details for DOI 10.1016/j.biochi.2011.07.020

    View details for Web of Science ID 000300270900006

    View details for PubMedID 21802486

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