Protein
Pyrophosphate--fructose 6-phosphate 1-phosphotransferase
Organism
Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145)
Function
Catalyzes the phosphorylation of D-fructose 6-phosphate, the first committing step of glycolysis. Uses inorganic phosphate (PPi) as phosphoryl donor instead of ATP like common ATP-dependent phosphofructokinases (ATP-PFKs), which renders the reaction reversible, and can thus function both in glycolysis and gluconeogenesis. Consistently, PPi-PFK can replace the enzymes of both the forward (ATP-PFK) and reverse (fructose-bisphosphatase (FBPase)) reactions.
Similarity
Belongs to the phosphofructokinase type A (PFKA) family. Mixed-substrate PFK group III subfamily.
Sequence
MKVGVLTGGGDCPGLNAVIRAVVRKGVQEYGYDFTGFRDGWRGPLEGDTVPLDIPAVRGILPRGGTVLGSSRTNPLKQRDGIRRIKDNLAALGVEALITIGGEDTLGVATRLADEYGVPCVGVPKTIDNDLSATDYTFGFDTAVGIATEAIDRLHTTAESHMRVLVVEVMGRHAGWIALHSGLAGGANVILIPEQRFDVEQVCSWVTSRFRASYAPIVVVAEGAMPRDGDMVLKDESLDSYGHVRLSGVGEWLAKQIEKRTGNEARTTVLGHVQRGGTPSAFDRWLATRFGLHAVDCVHDGDFGKMVALRGTDIVRVPIAEATARLKTVDPALYEEVGVFFG