Substrate Effect on LTA4H Aminopeptidase Activity in The Presence of 4MDM
Abstract
The leukotriene A4 hydrolase (LTA4H) protein is a zinc-containing bifunctional enzyme with epoxide hydrolase (EH) activity and aminopeptidase (AP) activity. LTA4H has long been regarded as an anti-inflammatory target since it controls the rate-limiting step in the biosynthesis of the inflammatory mediator leukotriene B4 (LTB4). In addition to the EH activity, LTA4H is an aminopeptidase which has a broad substrates specificity. It is proposed that the LTA4H aminopeptidase activity may have an important role in the processing of peptides related to inflammation. The small molecule 4- methoxydiphenylmethane (4MDM) was reported previously to selectively augment the LTA4H aminopeptidase activity without affecting the bioproduction of LTB4 in vivo. Thus, this thesis aims to determine the mechanism of LTA4H-mediated hydrolysis of peptidyl substrates in the presence of 4MDM.
Description
This thesis has been embargoed for 10 years and will not be available until May 2029 at the earliest.
Keywords
Lys-pNA hydrolysis, LTA4H, Aminopeptidase activity, 4MDM, Kinetic assay