Creatine kinase, mitochondrial 1B (CKMT1B)

Creatine kinase, mitochondrial 1B (CKMT1B) is a mitochondrial enzyme belonging to the creatine kinase family, catalyzing the reversible transfer of phosphate between ATP and creatine to maintain cellular energy homeostasis, particularly in tissues with fluctuating or high energy demands such as brain, muscle, and sperm. CKMT1B is one of two genes (along with CKMT1A) encoding the ubiquitous mitochondrial creatine kinase protein, found as dimers or octamers in the mitochondrial intermembrane space, mediating energy buffering and signal transduction required for cellular processes with rapid energy turnover. CKMT1B is clinically relevant as its overexpression is linked to malignancy and poor prognosis in several cancers, while genomic deletions or low expression are diagnostic or prognostic in auditory dysfunction and gliomas, respectively. Loss of CKMT1B function may contribute to disease states by impairing cellular energy balance and is being studied both as a biomarker and potential therapeutic target.

Other names

CKMT1BCKMTCKMT1CKMT1AMia-CKU-MtCKUMTCKAcidic-type mitochondrial creatine kinaseUbiquitous mitochondrial creatine kinasemia-CKubiquitous mitochondrial creatine kinasecreatine kinase U-type, mitochondrial

Inhibitors would reduce ATP regeneration via phosphocreatine shuttle; Modulators would affect cellular energy buffering, oxidative phosphorylation coupling, and cell survival in high energy-demanding tissues