FEATURES

FAMILY

phosphofructokinase type A (PFKA) family

DESCRIPTION

Also known as PFKAM_HUMAN, PFKM, PFKX. Catalyzes the phosphorylation of D-fructose 6-phosphate to fructose 1, 6-bisphosphate by ATP, the first committing step of glycolysis. Homo- and heterotetramers (By similarity). Phosphofructokinase (PFK) enzyme functions as a tetramer composed of different combinations of 3 types of subunits, called PFKM (where M stands for Muscle), PFKL (Liver) and PFKP (Platelet). The composition of the PFK tetramer differs according to the tissue type it is present in. In muscles, it is composed of 4 PFKM subunits (also called M4). In the liver, the predominant form is a tetramer of PFKL subunits (L4). In erythrocytes, both PFKM and PFKL subunits randomly tetramerize to form M4, L4 and other combinations (ML3, M2L2, M3L). The kinetic and regulatory properties of the tetrameric enzyme are dependent on the subunit composition, hence can vary across tissues (Probable). Interacts (via C-terminus) with HK1 (via N-terminal spermatogenic cell-specific region) (By similarity).

EXTERNAL LINKS

PFKM

ATP-dependent 6-phosphofructokinase, muscle type

PFKM

Molecular Synopsis