Association of betaine-homocysteine S-methyltransferase with microtubules.

Abstract:

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

journal_name

Biol Chem

journal_title

Biological chemistry

authors

Sandu C,Nick P,Hess D,Schiltz E,Garrow TA,Brandsch R

doi

10.1515/BC.2000.080

keywords:

subject

Has Abstract

pub_date

2000-07-01 00:00:00

pages

619-22

issue

7

eissn

1431-6730

issn

1437-4315

journal_volume

381

pub_type

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