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Genetics

Botany Publication and Papers

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Full-Text Articles in Molecular Biology

Molecular Characterization Of The Non-Biotin-Containing Subunit Of 3-Methylcrotonyl-Coa Carboxylase, Angela L. Mckean, Jinshan Ke, Jianping Song, Ping Che, Sara Achenbach, Basil J. Nikolau, Eve S. Wurtele Jan 2000

Molecular Characterization Of The Non-Biotin-Containing Subunit Of 3-Methylcrotonyl-Coa Carboxylase, Angela L. Mckean, Jinshan Ke, Jianping Song, Ping Che, Sara Achenbach, Basil J. Nikolau, Eve S. Wurtele

Botany Publication and Papers

The biotin enzyme, 3-methylcrotonyl-CoA carboxylase (MCCase) (3-methylcrotonyl-CoA:carbon-dioxide ligase (ADP-forming), EC 6.4.1.4), catalyzes a pivotal reaction required for both leucine catabolism and isoprenoid metabolism. MCCase is a heteromeric enzyme composed of biotin-containing (MCC-A) and non-biotin-containing (MCC-B) subunits. Although the sequence of the MCC-A subunit was previously determined, the primary structure of the MCC-B subunit is unknown. Based upon sequences of biotin enzymes that use substrates structurally related to 3-methylcrotonyl-CoA, we isolated the MCC-B cDNA and gene ofArabidopsis. Antibodies directed against the bacterially produced recombinant protein encoded by the MCC-B cDNA react solely with the MCC-B subunit ...


Molecular Cloning Of Cdnas And Genes Coding For Beta-Methylcrotonyl-Coa Carboxylase Of Tomato, Xun Wang, Eve S. Wurtele, Greg Keller, Angela L. Mckean, Basil J. Nikolau Jan 1994

Molecular Cloning Of Cdnas And Genes Coding For Beta-Methylcrotonyl-Coa Carboxylase Of Tomato, Xun Wang, Eve S. Wurtele, Greg Keller, Angela L. Mckean, Basil J. Nikolau

Botany Publication and Papers

Tomato cDNA and genomic clones were isolated by using as a probe a cDNA clone that had originally been identified by its ability to direct the synthesis of a biotin-containing polypeptide in Escherichia coli. The nucleotide sequences of the newly isolated cDNAs indicate that they are clones of a single mRNA molecule. However, one of the cDNA clones contains an insertion of a sequence which we identified as an unspliced intron. The amino acid sequence deduced from the nucleotide sequence of the cDNAs showed similarity to regions of previously sequenced biotin enzymes, indicating that the isolated cDNAs code for a ...