Crystal Structure of Biotin Carboxylase in Complex with Substrates and Implications for Its Catalytic Mechanism

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Crystal structure of biotin carboxylase in complex with substrates and implications for its catalytic mechanism.

Biotin-dependent carboxylases are widely distributed in nature and have important functions in many cellular processes. These enzymes share a conserved biotin carboxylase (BC) component, which catalyzes the ATP-dependent carboxylation of biotin using bicarbonate as the donor. Despite the availability of a large amount of biochemical and structural information on BC, the molecular basis for its ...

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The biotin carboxylase-biotin carboxyl carrier protein complex of Escherichia coli acetyl-CoA carboxylase.

Escherichia coli acetyl-CoA carboxylase (ACC) is composed of four different protein molecules. These proteins form a large but very unstable complex. Hints of a sub-complex between the biotin carboxylase (BC) and biotin carboxyl carrier protein (BCCP) subunits have been reported in the literature, but the complex was not isolated and thus the protein stoichiometry could not be determined. We re...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 2009

ISSN: 0021-9258

DOI: 10.1074/jbc.m805783200