CATH Classification

Domain Context

CATH Clusters

Superfamily EF-hand
Functional Family

Enzyme Information

2.7.11.19
Phosphorylase kinase.
based on mapping to UniProt P62149
2 ATP + phosphorylase b = 2 ADP + phosphorylase a.
-!- Requires calmodulin for activity. -!- The enzyme phosphorylates a specific serine residue in each of the subunits of the dimeric phosphorylase b. -!- For muscle phosphorylase but not liver phosphorylase, this is accompanied by a further dimerization to form a tetrameric phosphorylase. -!- The enzyme couples muscle contraction with energy production via glycogenolysis--glycolysis by catalyzing the Ca(2+)-dependent phosphorylation and activation of glycogen phosphorylase b. -!- The gamma subunit of the tetrameric alpha-beta-gamma-delta enzyme is the catalytic subunit. -!- Formerly EC 2.7.1.38.

UniProtKB Entries (1)

P11716
RYR1_RABIT
Oryctolagus cuniculus
Ryanodine receptor 1

PDB Structure

PDB 2BCX
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
Complex of calmodulin with a ryanodine receptor target reveals a novel, flexible binding mode.
Maximciuc, A.A., Putkey, J.A., Shamoo, Y., Mackenzie, K.R.
Structure