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 Chemjournal_title
Biological chemistryauthors
Sandu C,Nick P,Hess D,Schiltz E,Garrow TA,Brandsch Rdoi
10.1515/BC.2000.080keywords:
subject
Has Abstractpub_date
2000-07-01 00:00:00pages
619-22issue
7eissn
1431-6730issn
1437-4315journal_volume
381pub_type
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