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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Effects of known phenoloxidase inhibitors on hemocyanin-derived phenoloxidase from Limulus polyphemus
Author(s): Wright, Jamie
Clark, William McCaskill
Cairn, Jennifer A
Patterson, Alan
Coates, Christopher
Nairn, Jacqueline
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Keywords: Hemocyanin
Hemocyanin-derived phenoloxidase
Issue Date: Nov-2012
Citation: Wright J, Clark WM, Cairn JA, Patterson A, Coates C & Nairn J (2012) Effects of known phenoloxidase inhibitors on hemocyanin-derived phenoloxidase from Limulus polyphemus, Comparative Biochemistry and Physiology - Part B: Biochemistry and Molecular Biology, 163 (3-4), pp. 303-308.
Abstract: Inhibitors of phenoloxidase are used routinely to characterise the structural and functional properties of phenoloxidases. Hemocyanin-derived phenoloxidase activity is also sensitive to standard phenoloxidase inhibitors. In this study, we characterise the effects of a number of phenoloxidase inhibitors on hemocyanin-derived phenoloxidase activity from the chelicerate, Limulus polyphemus. Both inhibition type and Ki values were similar to those observed for hemocyanin-derived phenoloxidase from another chelicerate, Eurypelma californicum. In addition, substrate inhibition was observed at concentrations above 2 mM dopamine. The conformation in which two of the inhibitors, namely tropolone and kojic acid, would bind near the Cu(II) centre of hemocyanin is proposed.
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