Phosphoryl transfer enzyme

Phosphoryl transfer enzymes are a broad and diverse class of proteins, including kinases and phosphatases, that catalyze the movement of a phosphate group from a donor molecule to an acceptor (Lassila, J. K., et al., Annu Rev Biochem, 2011). These enzymes play a pivotal role in cellular signaling, metabolism, and energy transfer by acting as molecular switches that regulate protein activity and localization (Westheimer, F. H., Science, 1987). They are formally classified under EC 2.7 and are essential for fundamental biological processes such as glycolysis, DNA replication, and the cell cycle (UniProt, 2024). Dysregulation of these enzymes, particularly protein kinases, is a primary driver of various diseases including cancer, where constitutive activation leads to uncontrolled cell proliferation and survival (Manning, G., et al., Science, 2002). Pharmacological intervention typically involves small-molecule inhibitors that compete with ATP or allosterically modulate the enzyme's conformation to prevent signaling (Zhang, J., et al., Nat Rev Cancer, 2009). Additionally, many antiviral therapies target viral phosphoryl transfer enzymes, such as polymerases, to inhibit genome replication (De Clercq, E., Nat Rev Drug Discov, 2002). However, the high structural conservation of the catalytic domains across this superfamily presents significant challenges for achieving drug selectivity and avoiding off-target toxicities (Knight, Z. A., et al., Nat Rev Cancer, 2005).

Other names

PhosphotransferaseKinasePhosphataseNucleotidyltransferasePhosphate transferase

Inhibition of phosphate group transfer by competing with the phosphate donor (typically ATP) or the substrate, or through allosteric modulation of the enzyme's catalytic conformation.