Biotechnologically Relevant Enzymes and Proteins

Applied Microbiology and Biotechnology

, Volume 75, Issue 6, pp 1285-1291

Metallopeptidase, neurolysin, as a novel molecular tool for analysis of properties of cancer-producing matrix metalloproteinases-2 and -9

  • Tetsuya KadonosonoAffiliated withDivision of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
  • , Michiko KatoAffiliated withDivision of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
  • , Mitsuyoshi UedaAffiliated withDivision of Applied Life Sciences, Graduate School of Agriculture, Kyoto University Email author 

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Abstract

To compare the substrate preferences of rat brain neurolysin and cancer-producing matrix metalloproteinases (MMPs), which have the same architecture in their catalytic domains, the cleavage activity of neurolysin toward MMP-specific fluorescence-quenching peptides was quantitatively measured. The results show that neurolysin effectively cleaved MOCAc [(7-methoxy coumarin-4-yl) acetyl]-RPKPYANvaWMK(Dnp[2,4-dinitrophenyl])-NH2, a specific substrate of MMP-2 and MMP-9, but hardly cleaved MOCAc-RPKPVENvaWRK(Dnp)-NH2, a specific substrate of MMP-3, suggesting that neurolysin has a similar substrate preference to MMP-2 and MMP-9. A structural comparison between neurolysin and MMP-9 showed the similar key amino acid residues for substrate recognition. The possible application of neurolysin displayed on the yeast cell surface, as a safe protein alternative to MMP-2 and MMP-9 which induce cancer cell growth, invasion, and metastasis, to analysis of properties of the MMPs, including the screening of inhibitors and analysis of inhibition mechanism etc., are also discussed.

Keywords

Molecular display Matrix metalloproteinase Neurolysin Substrate preference Specific inhibitors