کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2581610 | 1561653 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The level of aryl acylamidase activity displayed by human butyrylcholinesterase depends on its molecular distribution
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
بهداشت، سم شناسی و جهش زایی
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![عکس صفحه اول مقاله: The level of aryl acylamidase activity displayed by human butyrylcholinesterase depends on its molecular distribution The level of aryl acylamidase activity displayed by human butyrylcholinesterase depends on its molecular distribution](/preview/png/2581610.png)
چکیده انگلیسی
Butyrylcholinesterase (BuChE) and acetylcholinesterase (AChE) display both esterase and aryl acylamidase (AAA) activities. Their AAA activity can be measured using o-nitroacetanilide (ONA). In human samples depleted of acetylcholinesterase, we noticed that the ratio of amidase to esterase activities varied depending on the source, despite both activities being due to BuChE. Searching for an explanation, we compared the activities of BuChE molecular forms in samples of human colon, kidney and serum, and observed that BuChE monomers (G1) hydrolyzed o-nitroacetanilide much faster than tetramers (G4). This fact suggested that association might cause differences in the AAA site between single and polymerized subunits. This and other post-translational modifications in BuChE subunits probably determine their level of AAA activity. The higher amidase activity of monomers could justify the presence of single BuChE subunits in cells as a way to preserve the AAA activity of BuChE, which could be lost by oligomerization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemico-Biological Interactions - Volume 175, Issues 1â3, 25 September 2008, Pages 336-339
Journal: Chemico-Biological Interactions - Volume 175, Issues 1â3, 25 September 2008, Pages 336-339
نویسندگان
M.F. Montenegro, M.T. Moral-Naranjo, M. Páez de la Cadena, F.J. Campoy, E. Muñoz-Delgado, C.J. Vidal,