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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

The CIT3 gene of Saccharomyces cerevisiae encodes a second mitochondrial isoform of citrate synthase.

We have identified a third citrate synthase gene in Saccharomyces cerevisiae which we have called CIT3. Complementation of a citrate synthase-deficient strain of Escherichia coli by lacZ::CIT3 gene fusions demonstrated that the CIT3 gene encodes an active citrate synthase. The CIT3 gene seems to be regulated in the same way as CIT1, which encodes the mitochondrial isoform of citrate synthase. Deletion of the CIT3 gene in a delta cit1 background severely reduced growth on the respiratory substrate glycerol, whilst multiple copies of the CIT3 gene in a delta cit1 background significantly improved growth on acetate. In vitro import experiments showed that cit3p is transported into the mitochondria. Taken together, these data show that the CIT3 gene encodes a second mitochondrial isoform of citrate synthase.[1]

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