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Annotation rule MF_01978
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General rule information [?]

Accession MF_01978
Dates 16-MAY-2014 (Created)
19-NOV-2019 (Last updated, Version 8)
Name Phosphofructokinase_II_B2
Templates Q609I3 (PFP_METCA); Q2RNU4 (PFP_RHORT); B0RP51 (PFP_XANCB): [Recover all]

Propagated annotation [?]

Identifier, protein and gene names [?]

Protein name
RecName: Full=Pyrophosphate--fructose 6-phosphate 1-phosphotransferase;
AltName: Full=6-phosphofructokinase, pyrophosphate dependent;
AltName: Full=PPi-dependent phosphofructokinase;
AltName: Full=Pyrophosphate-dependent 6-phosphofructose-1-kinase;
Gene name

Comments [?]

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.
Catalytic activity RHEA:13613: beta-D-fructose 6-phosphate + diphosphate = beta-D-fructose 1,6-bisphosphate + H(+) + phosphate
Cofactor Mg(2+)
Activity regulation Non-allosteric.
Pathway Carbohydrate degradation; glycolysis; D-glyceraldehyde 3-phosphate and glycerone phosphate from D-glucose: step 3/4.
Subunit Homodimer.
Subcellular location Cytoplasm.
Similarity Belongs to the phosphofructokinase type A (PFKA) family. PPi-dependent PFK group II subfamily. Clade 'B2' sub-subfamily.

Keywords [?]

Gene Ontology [?]

GO:0003872; Molecular function: 6-phosphofructokinase activity.
GO:0006096; Biological process: glycolytic process.
GO:0005737; Cellular component: cytoplasm.

Cross-references [?]

Pfam PF00365; PFK; 1;
PIRSF PIRSF036483; PFK_XF0274; 1;

Features [?]

From: PFP_METCA (Q609I3)
Key     From     To       Description   Tag   Condition   FTGroup
SITE     115     115       Important for catalytic activity and substrate specificity; stabilizes the transition state when the phosphoryl donor is PPi; prevents ATP from binding by mimicking the alpha-phosphate group of ATP     D  
REGION     142     144       Substrate binding     T-x-D  
REGION     190     192       Substrate binding     [MLV]-G-R  
REGION     297     300       Substrate binding     Y-x(2)-R  
ACT_SITE     144     144       Proton acceptor     D  
METAL     114     114       Magnesium; catalytic     N  
BINDING     247     247       Substrate     E  
BINDING     13     13       Diphosphate; via amide nitrogen     G  
SITE     141     141       Important for catalytic activity; stabilizes the transition state when the phosphoryl donor is PPi     K  

Additional information [?]

Size range 384-432 amino acids
Related rules None
Fusion None
Comments Classification of type A phosphofructokinases into subfamilies was done according to Mueller at al.(2001) (PubMed:11673446) and Bapteste et al.(2003) (PubMed:14585511).