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Dau, T. ; Edeleva, E.V.* ; Seidel, S.A.* ; Stockley, R.A.* ; Braun, D.* ; Jenne, D.

Quantitative analysis of protease recognition by inhibitors in plasma using microscale thermophoresis.

Sci. Rep. 6:35413 (2016)
Publ. Version/Full Text Research data DOI
Open Access Gold
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High abundance proteins like protease inhibitors of plasma display a multitude of interactions in natural environments. Quantitative analysis of such interactions in vivo is essential to study diseases, but have not been forthcoming, as most methods cannot be directly applied in a complex biological environment. Here, we report a quantitative microscale thermophoresis assay capable of deciphering functional deviations from in vitro inhibition data by combining concentration and affinity measurements. We obtained stable measurement signals for the substrate-like interaction of the disease relevant inhibitor α-1-antitrypsin (AAT) Z-variant with catalytically inactive elastase. The signal differentiates between healthy and sick AAT-deficient individuals suggesting that affinity between AAT and elastase is strongly modulated by so-far overlooked additional binding partners from the plasma.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Neutrophil Elastase; Living Cells; Alpha(1)-antitrypsin; Mechanism; Alpha-1-antitrypsin; Progression; Deficiency; Activation; Insights; Linking
ISSN (print) / ISBN 2045-2322
e-ISSN 2045-2322
Quellenangaben Volume: 6, Issue: , Pages: , Article Number: 35413 Supplement: ,
Publisher Nature Publishing Group
Publishing Place London
Reviewing status Peer reviewed