Startseite Association of Betaine-Homocysteine S-Methyltransferase with Microtubules
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Association of Betaine-Homocysteine S-Methyltransferase with Microtubules

  • Cristinel Sandu , Peter Nick , Daniel Hess , Emil Schiltz , Timothy A. Garrow und Roderich Brandsch
Veröffentlicht/Copyright: 1. Juni 2005
Biological Chemistry
Aus der Zeitschrift Band 381 Heft 7

Abstract

In mammals, betaine of the mitochondrial matrix is used in the cytosol by betainehomocysteine Smethyltransferase for methionine synthesis. The resulting dimethylglycine is shuttled back into the mitochondrial matrix for further degradation. Nanospray tandem mass spectrometry and Nterminal amino acid sequencing of microtubuleassociated proteins from rat liver tubulin revealed that betainehomocysteine Smethyltransferase is microtubule associated. This was confirmed by confocal laser scanning microscopy of HepG2 cells labeled with betainehomocysteine Smethyltransferase and αtubulinspecific monoclonal antibodies. The association of betainehomocysteine Smethyltransferase with the cytoskeleton may functionally integrate the mitochondrial and cytoplasmic compartments of choline degradation.

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Published Online: 2005-06-01
Published in Print: 2000-07-04

Copyright © 2000 by Walter de Gruyter GmbH & Co. KG

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