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Different membrane-bound forms of acetylcholinesterase are present at the cell surface of hepatocytes.

Authors: Perelman, A  Brandan, E 
Citation: Perelman A and Brandan E, Eur J Biochem. 1989 Jun 1;182(1):203-7.
Pubmed: (View Article at PubMed) PMID:2731551

In the present study we have determinated the acetylcholinesterase molecular forms present in rat liver hepatocytes; we have also studied the association of acetylcholinesterase with the cell surface of the hepatocytes. Subcellular fractionation indicated that rough endoplasmic reticulum and plasma-membrane-enriched fractions contains G4 and G2 acetylcholinesterase forms bound to membranes. Hepatocytes incubated with phosphatidylinositol-specific phospholipase C released about 70% of the surface acetylcholinesterase. Sedimentation analysis showed that all the solubilized acetylcholinesterase activity comes exclusively from a G2 dimer. The G4 hydrophobic form of acetylcholinesterase accounts for the additional cell-surface activity. The existence of these two forms of acetylcholinesterase on the surface of hepatocytes was further established by analyzing the phosphatidylinositol-specific phospholipase C sensitivity of the acetylcholinesterase molecular forms present in isolated rat liver plasma membranes.

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CRRD Object Information
CRRD ID: 2301205
Created: 2008-09-30
Species: All species
Last Modified: 2008-09-30
Status: ACTIVE



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