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Fructose 2,6-bisphosphate, abbreviated Fru-2,6-P 2, is a metabolite that allosterically affects the activity of the enzymes phosphofructokinase 1 (PFK-1) and fructose 1,6-bisphosphatase (FBPase-1) to regulate glycolysis and gluconeogenesis.
Phosphofructokinase-2 (6-phosphofructo-2-kinase, PFK-2) or fructose bisphosphatase-2 (FBPase-2), is an enzyme indirectly responsible for regulating the rates of glycolysis and gluconeogenesis in cells. It catalyzes formation and degradation of a significant allosteric regulator, fructose-2,6-bisphosphate (Fru-2,6-P 2) from substrate fructose-6 ...
The enzyme fructose-2,6-bisphosphate 2-phosphatase ({EC 3.1.3.46) catalyzes the reaction . β-D-fructose 2,6-bisphosphate + H 2 O D-fructose 6-phosphate + phosphateThis enzyme belongs to the family of hydrolases, specifically those acting on phosphoric monoester bonds.
Function [ edit ] The bifunctional 6-phosphofructo-2-kinase ( EC 2.7.1.105 )/fructose-2,6-bisphosphatase ( EC 3.1.3.46 ) (PFKFB) regulates the steady-state concentration of fructose 2,6-bisphosphate , an activator of a key regulatory enzyme of glycolysis , phosphofructokinase .
This protein regulates fructose-2,6-bisphosphate levels in the heart, while a related enzyme encoded by a different gene regulates fructose-2,6-bisphosphate levels in the liver and muscle. This enzyme functions as a homodimer. Two transcript variants encoding two different isoforms have been found for this gene. [5]
PFK1 is allosterically activated by a high concentration of AMP, but the most potent activator is fructose 2,6-bisphosphate, which is also produced from fructose-6-phosphate by PFK2. Hence, an abundance of F6P results in a higher concentration of fructose 2,6-bisphosphate (F-2,6-BP). The binding of F-2,6-BP increases the affinity of PFK1 for ...
Researcher found that iPFK2 has a beta-hairpin N-terminal structure that secures the binding of fructose-6-phosphate to the active site via interaction with the protein's ‘2-Pase’ domain. There are two active pockets within iPFK2 for fructose-2,6-bisphosphatase and 6-phosphofructo-2-kinase which are structurally different.
14120 Ensembl ENSG00000130957 ENSMUSG00000021456 UniProt O00757 P70695 RefSeq (mRNA) NM_003837 NM_007994 RefSeq (protein) NP_003828 NP_032020 Location (UCSC) Chr 9: 94.56 – 94.59 Mb Chr 13: 62.98 – 63.01 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Fructose-bisphosphatase 2 is an enzyme that in humans is encoded by the FBP2 gene. Function This gene encodes a gluconeogenesis ...