Abstract:
:Investigations of the coenzyme specificity of N5-methyltetrahydrofolate-homocysteine methyltransferases of diverse biological origin revealed previously unrecognized differences between Escherichia coli methyltransferase and the corresponding enzymes of other species. Cyanocobalamin (CNCbl) actively supports methyltransferase in extracts of animal tissues and E. coli. Cobinamide is more active than CNCbl with rat liver methyltransferase; however, it is non-competitively inhibitory with E. coli enzyme. E. coli methyltransferase, but not rat liver enzyme, is competitively inhibited by alpha-ribazole 3'-phosphate and 5,6-dimethyl-benzimidazole, two moieties of the nucleotide loop. This suggests that animal enzyme binds its corrinoid coenzyme at a site on the corrin macro-ring, while E. coli enzyme binds to the nucleotide loop as well as the macro-ring.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Beck WS,Thorndike Jdoi
10.1016/0006-291x(84)91415-3subject
Has Abstractpub_date
1984-04-16 00:00:00pages
74-80issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(84)91415-3journal_volume
120pub_type
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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更新日期:1993-10-15 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(84)90702-2
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(88)90515-3
更新日期:1988-01-15 00:00:00
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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journal_title:Biochemical and biophysical research communications
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更新日期:2007-11-03 00:00:00
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更新日期:2009-01-16 00:00:00
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journal_title:Biochemical and biophysical research communications
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更新日期:2011-06-17 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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更新日期:2012-07-20 00:00:00
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journal_title:Biochemical and biophysical research communications
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更新日期:1995-03-08 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(03)00055-x
更新日期:2003-02-21 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2014.02.078
更新日期:2014-03-28 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
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更新日期:2020-02-05 00:00:00