نتایج جستجو برای: arylesterase

تعداد نتایج: 978  

Journal: :Journal of lipid research 2007
Leonid Gaidukov Dan S Tawfik

Serum paraoxonase (PON1) is a lipolactonase that associates with HDL-apolipoprotein A-I (HDL-apoA-I) and thereby plays a role in the prevention of atherosclerosis. Current sera tests make use of promiscuous substrates and provide no indications regarding HDL-PON1 complex formation. We developed new enzymatic tests that detect total PON1 levels, irrespective of HDL status and R/Q polymorphism, a...

Journal: :Journal of physical organic chemistry 2010
Toby T Sanan Sivaramakrishnan Muthukrishnan Jeremy M Beck Peng Tao Carrigan J Hayes Tamara C Otto Douglas M Cerasoli David E Lenz Christopher M Hadad

The enzyme human paraoxonase 1 (huPON1) has demonstrated significant potential for use as a bioscavenger for treatment of exposure to organophosphorus (OP) nerve agents. Herein we report the development of protein models for the human isoform derived from a crystal structure of a chimeric version of the protein (pdb ID: 1V04) and a homology model derived from the related enzyme diisopropylfluor...

2006
T. M. van Himbergen L. J. H. van Tits M. Roest A. F. H. Stalenhoef

since the discovery of human serum paraoxonase (poN1), the enzyme has been the subject of various fields of research. initially, poN1 was identified as an enzyme capable of hydrolysing organophosphate compounds, but there is a growing body of evidence that poN1 plays a role in lipid metabolism and the onset of cardiovascular disease. still, the precise mechanism by which poN1 functions in vivo ...

Journal: :Nature chemical biology 2011
Rinkoo D Gupta Moshe Goldsmith Yacov Ashani Yair Simo Gavriel Mullokandov Hagit Bar Moshe Ben-David Haim Leader Raanan Margalit Israel Silman Joel L Sussman Dan S Tawfik

Organophosphate nerve agents are extremely lethal compounds. Rapid in vivo organophosphate clearance requires bioscavenging enzymes with catalytic efficiencies of >10(7) (M(-1) min(-1)). Although serum paraoxonase (PON1) is a leading candidate for such a treatment, it hydrolyzes the toxic S(p) isomers of G-agents with very slow rates. We improved PON1's catalytic efficiency by combining random ...

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