The protein encoded by this gene is a cytoplasmic enzyme involved in energy homeostasis. The encoded protein reversibly catalyzes the transfer of phosphate between ATP and various phosphogens such as creatine phosphate. It acts as a homodimer in brain as well as in other tissues, and as a heterodimer with a similar muscle isozyme in heart. The encoded protein is a member of the ATP:guanido phosphotransferase protein family. A pseudogene of this gene has been characterized.
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Protein Aliases: CPK-M; Creatine kinase M chain; Creatine kinase M-type; creatine kinase, muscle; Creatine phosphokinase M-type; M-CK
Gene Aliases: CKM; CKMM; M-CK; MCK
Molecular Function: amino acid kinase