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- W2085673765 abstract "Matrix metalloproteinases (MMPs) are important hydrolytic enzymes with profound physiological and pathological functions in living organisms. MMPs are produced in their inactive zymogenic forms, which are subsequently proteolytically activated in an elaborate set of events. The propeptide in the zymogen blocks the active site, with a cysteine side-chain thiolate from this propeptide achieving coordination with the catalytically important zinc ion in the active site. Molecular dynamics simulations, ab initio calculations, and wet chemistry experiments presented herein argue for the critical importance of a protonation event at the coordinated thiolate as a prerequisite for the departure of the propeptide from the active site. Furthermore, a catalytically important glutamate is shown to coordinate transiently to the active-site zinc ion to mask the positive potential of the zinc ion and lower the energy barrier for dissociation of the protonated cysteine side chain from the zinc ion. In addition, a subtle conformational change by the propeptide is needed in the course of zymogen activation. These elaborate processes take place in concert in the activation process of MMPs, and the insight into these processes presented herein sheds light on a highly regulated physiological process with profound consequences for eukaryotic organisms." @default.
- W2085673765 created "2016-06-24" @default.
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- W2085673765 date "2001-03-06" @default.
- W2085673765 modified "2023-10-16" @default.
- W2085673765 title "Insight into the Complex and Dynamic Process of Activation of Matrix Metalloproteinases" @default.
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- W2085673765 doi "https://doi.org/10.1021/ja001896a" @default.
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