Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | required | Mus musculus |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + ceramide | Mus musculus | - |
ADP + ceramide 1-phosphate | - |
? | |
ATP + ceramide | Mus musculus C57BL/6J | - |
ADP + ceramide 1-phosphate | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Mus musculus | Q8K4Q7 | - |
- |
Mus musculus C57BL/6J | Q8K4Q7 | - |
- |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
C2C12 cell | - |
Mus musculus | - |
myoblast | - |
Mus musculus | - |
skeletal muscle | analysis of levels of miR-34a, ceramide kinase (CERK) and other insulin signaling molecules in skeletal muscle from old mice. miR-34a is elevated in the muscles of 2-year-old mice | Mus musculus | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + ceramide | - |
Mus musculus | ADP + ceramide 1-phosphate | - |
? | |
ATP + ceramide | - |
Mus musculus C57BL/6J | ADP + ceramide 1-phosphate | - |
? |
Synonyms | Comment | Organism |
---|---|---|
CERK | - |
Mus musculus |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
ATP | - |
Mus musculus |
General Information | Comment | Organism |
---|---|---|
malfunction | miR-34a targets CERK resulting in ceramide accumulation, activation of PP2A and the pJNK pathway in muscle and C2C12 myoblasts. Overexpression of miR-34a in C2C12 myoblasts leads to alterations in the insulin signaling pathway, which are rescued by its antagonism | Mus musculus |
metabolism | myostatin (Mstn) and microRNA miR-34a antagonism can help ameliorate ceramide accumulation and loss of insulin sensitivity in aging skeletal muscle | Mus musculus |
physiological function | myostatin (Mstn) levels increase in aging mouse muscle and upregulate miR-34a, which inhibits CERK resulting in increased ceramide levels. This ceramide accumulation activates PP2A and pJNK causing hypophosphorylation of AKT and hyperphosphorylation of IRS1 (Ser307), respectively, impairing insulin signaling pathway and eventually inhibiting the sarcolemma localization of GLUT4. These changes can result in reduced glucose uptake and insulin resistance. CERK inhibition affects insulin signaling pathway in C2C12 myoblasts via ceramide accumulation. CERK inhibition with NVP231 results in hypophosphorylation of insulin signaling molecules (PI3K, AKT, AS160, and GSK3b) and hyperphosphorylation of IRS1 (Ser307) when compared with dimethyl sulfoxide treated control C2C12 myoblasts | Mus musculus |