[Isoform 1]: Cytoplasm . Nucleus . Cell membrane ; Peripheral membrane protein. Perikaryon. Cell projection , lamellipodium . Cell projection , growth cone . Cell junction , synapse , postsynaptic density . Cell junction , synapse . In axonal growth cone with extension to the peripheral lamellipodia (By similarity) . Under neurotoxic stress and neuronal injury conditions , CDK5R (p35) is cleaved by calpain to generate CDK5R1 (p25) in response to increased intracellular calcium. The elevated level of p25 , when in complex with CDK5 , leads to its subcellular misallocation as well as its hyperactivation. Colocalizes with CTNND2 in the cell body of neuronal cells , and with CTNNB1 in the cell-cell contacts and plasma membrane of undifferentiated and differentiated neuroblastoma cells. Reversibly attached to the plasma membrane in an inactive form when complexed to dephosphorylated p35 or CDK5R2 (p39) , p35 phosphorylation releases this attachment and activates CDK5. .; [Isoform 2]: Nucleus.
展开内容