ISSN:
1432-072X
Keywords:
Key wordsCorynebacterium glutamicum
;
Biotin
;
carboxylase
;
Biotin-carboxyl-carrier protein
;
Acetyl-CoA carboxylase
;
Fatty acid synthesis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Following the analysis of transposon Tn5432-induced mutants of Corynebacterium glutamicum ATCC 13032, a gene encoding a protein with a biotin-binding motif was cloned. The DNA sequence of this gene revealed an open reading frame encoding 591 amino acids with a calculated mol. mass of 63.4 kDa. The protein is composed of two domains, an N-terminal biotin carboxylase and a C-terminal biotin-carboxyl-carrier protein, that are highly similar to corresponding subunits from prokaryotic and eukaryotic biotin enzymes. Over 70% identity was found to a protein from Mycobacterium leprae proposed to be part of an acyl-CoA carboxylase. Since it was not possible to inactivate the C. glutamicum gene, the gene most likely encodes a subunit of the essential acetyl-CoA carboxylase, which catalyzes the committed step in fatty acid synthesis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002030050359
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