The C-terminal domains of TACE weaken the inhibitory action of N-TIMP-3.
Tumor necrosis factor-alpha converting enzyme (TACE) is an ADAM (a disintegrin and metalloproteinases) that comprises an active catalytic domain and several C-terminal domains. We compare the binding affinity and association rate constants of the N-terminal domain form of wild-type tissue inhibitor of metalloproteinase (TIMP-3; N-TIMP-3) and its mutants against full-length ... recombinant TACE and the truncated form of its catalytic domain. We show that the C-terminal domains of TACE substantially weaken the inhibitory action of N-TIMP-3. Further probing with hydroxamate inhibitors indicates that both forms of TACE have similar active site configurations. Our findings highlight the potential role of the C-terminal domains of ADAM proteinases in influencing TIMP interactions.
Mesh Terms:
ADAM Proteins, Amino Acid Substitution, Catalytic Domain, Enzyme Inhibitors, Hydroxamic Acids, Kinetics, Leucine, Metalloendopeptidases, Mutation, Recombinant Proteins, Serine, Threonine, Tissue Inhibitor of Metalloproteinase-3
ADAM Proteins, Amino Acid Substitution, Catalytic Domain, Enzyme Inhibitors, Hydroxamic Acids, Kinetics, Leucine, Metalloendopeptidases, Mutation, Recombinant Proteins, Serine, Threonine, Tissue Inhibitor of Metalloproteinase-3
FEBS Lett.
Date: Jun. 05, 2002
PubMed ID: 12044879
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