| First Author | Amour A | Year | 2002 |
| Journal | FEBS Lett | Volume | 524 |
| Issue | 1-3 | Pages | 154-8 |
| PubMed ID | 12135759 | Mgi Jnum | J:169801 |
| Mgi Id | MGI:4942254 | Doi | 10.1016/s0014-5793(02)03047-8 |
| Citation | Amour A, et al. (2002) The enzymatic activity of ADAM8 and ADAM9 is not regulated by TIMPs. FEBS Lett 524(1-3):154-8 |
| abstractText | The ADAM family of proteases are type I transmembrane proteins with both metalloproteinase and disintegrin containing extracellular domains. ADAMs are implicated in the proteolytic processing of membrane-bound precursors and involved in modulating cell-cell and cell-matrix interactions. ADAM8 (MS2, CD156) has been identified in myeloid and B cells. In this report we demonstrate that soluble ADAM8 is an active metalloprotease in vitro and is able to hydrolyse myelin basic protein and a variety of peptide substrates based on the cleavage sites of membrane-bound cytokines, growth factors and receptors which are known to be processed by metalloproteinases. Interestingly, although ADAM8 was inhibited by a number of peptide analogue hydroxamate inhibitors, it was not inhibited by the tissue inhibitors of metalloproteinases (TIMPs). We also demonstrate that the activity of recombinant soluble ADAM9 (meltrin-gamma, MDC9) lacks inhibition by the TIMPs, but can be inhibited by hydroxamate inhibitors. The lack of TIMP inhibition of ADAM8 and 9 contrasts with other membrane-associated metalloproteinases characterised to date in this respect (ADAM10, 12, 17, and the membrane-type metalloproteinases) which have been implicated in protein processing at the cell surface. |
