Protein Variants | Comment | Organism |
---|---|---|
additional information | construction of the DELTAbioC deletion mutant, that is only able to grow in biotin and derivative supplemented medium. Escherichia coli strain ER90 DELTAbioF bioC bioD carries an insertion-deletion mutation within bioF that also inactivates the downstream genes, bioC and bioD, by transcriptional polarity | Escherichia coli |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
S-adenosyl-L-methionine + malonyl-CoA | Escherichia coli | - |
S-adenosyl-L-homocysteine + malonyl-CoA methyl ester | the methyl ester moiety is essential for chain elongation | ? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Escherichia coli | - |
- |
- |
Escherichia coli | - |
gene bioC | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
S-adenosyl-L-methionine + malonyl-CoA | - |
Escherichia coli | S-adenosyl-L-homocysteine + malonyl-CoA methyl ester | - |
? | |
S-adenosyl-L-methionine + malonyl-CoA | - |
Escherichia coli | S-adenosyl-L-homocysteine + malonyl-CoA methyl ester | the methyl ester moiety is essential for chain elongation | ? |
Synonyms | Comment | Organism |
---|---|---|
BioC | - |
Escherichia coli |
S-adenosyl-L-methionine-dependent methyltransferase | - |
Escherichia coli |
SAM-dependent methyltransferase | - |
Escherichia coli |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
S-adenosyl-L-methionine | - |
Escherichia coli |
General Information | Comment | Organism |
---|---|---|
malfunction | the DELTAbioC deletion mutant is only able to grow in biotin supplemented medium. Also supplementation with pimelic acid, and putative intermediates in the pathway, the enoyl, 3-keto and 3-hydroxy derivatives of the monomethyl ester of glutarate and the 3-keto and 3-hydroxy derivatives of the monomethyl ester of pimelate, allow growth of the mutant strain in the absence of biotin, but the 2-keto, 2-hydroxy and 4-keto derivatives, as well as monomethyl esters of C4, C6, C8, C9 and C11 dicarboxylates, do not, overview | Escherichia coli |
metabolism | the pimeloyl moiety of biotin is synthesized by a modified fatty acid synthetic pathway in which the omega-carboxyl group of a malonyl-thioester is methylated by BioC which allows recognition of this atypical substrate by the fatty acid synthetic enzymes. The malonyl-thioester methyl ester enters fatty acid synthesis as the primer and undergoes two reiterations of the fatty acid elongation cycle to give pimeloyl-acyl carrier protein methyl ester which is hydrolyzed to pimeloyl-ACP and methanol by BioH | Escherichia coli |
physiological function | in biotin synthesis, the pimeloyl moiety is synthesized by a modified fatty acid synthetic pathway in which the omega-carboxyl group of a malonyl-thioester is methylated by BioC, which allows recognition of this atypical substrate by the fatty acid synthetic enzymes. The malonyl-thioester methyl ester enters fatty acid synthesis as the primer and undergoes two reiterations of the fatty acid elongation cycle to give pimeloyl-acyl carrier protein methyl ester. Supplementation of biotin-free medium with any of malonic, glutaric and pimelic acid monomethyl ester allows for acyl-ACP-synthetase-dependent growth of the bioC deletion strain | Escherichia coli |
physiological function | the role of BioC is to convert the free carboxyl group of a malonylthioester to its methyl ester by transfer of a methyl group from SAM. Methylation both cancels the charge of the carboxyl group and provides a methyl carbon to mimic the methyl ends of normal fatty acyl chains | Escherichia coli |