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6-Phosphofructo-2-kinase/fructose-2,6-bisphosphatase: suiting structure to ne...
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6-Phosphofructo-2-kinase/fructose-2,6-bisphosphatase: suiting structure to need, in a family of tissue-specific enzymes
作者:
M. El-Maghrabi,
Frank Noto,
Ning Wu,
Nathan Manes,
期刊:
Current Opinion in Clinical Nutrition and Metabolic Care
(OVID Available online 2001)
卷期:
Volume 4,
issue 5
页码: 411-418
ISSN:1363-1950
年代: 2001
出版商: OVID
数据来源: OVID
摘要:
The present review addresses recent advances in research into a family of bifunctional enzymes that are responsible for the twofold task of synthesizing and hydrolyzing fructose-2,6-bisphosphate (Fru-2,6-P2), which in turn regulates the rate of glycolysis in most cells. The structure of the synthetic kinase, conjoined at its carboxyl-terminus to the phosphatase, is very highly conserved throughout evolution and differentiation, with isotypic expression arising from highly variable amino-terminal and carboxyl-terminal regulatory domains. These domains, which frequently contain protein-kinase-catalyzed phosphorylation motifs, are responsible for the widely divergent kinetics observed in various tissues and species, and for the hormonal modulation that alters intracellular levels of Fru-2,6-P2. The present review discusses recent advances in relating structure to function, and the identification of new pathways of transcriptional regulation of this important family of regulatory enzymes.
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