Journal
JOURNAL OF BACTERIOLOGY
Volume 184, Issue 12, Pages 3401-3405Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.184.12.3401-3405.2002
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The Pyrococcus furiosus fbpA gene was cloned and expressed in Escherichia coli, and the fructose-1,6-bisphosphatase produced was subsequently purified and characterized. The dimeric enzyme showed a preference for fructose-1,6-bisphosphate, with a K-m of 0.32 mM and a V-max of 12.2 U/mg. The P. furiosus fructose-1,6-bisphosphatase was strongly inhibited by Li+ (50% inhibitory concentration, I mM). Based on the presence of conserved sequence motifs and the substrate specificity of the P. furiosus fiructose-1,6-bisphosphatase, we propose that this enzyme belongs to a new family, class IV fructose-1,6-bisphosphatase.
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