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The Ca2+/calmodulin-dependent protein kinase type IV/Gr (CaMKIV/Gr) is a key effector of neuronal Ca2+ signaling; its function was analyzed by targeted gene disruption in mice. CaMKIV/Gr-deficient mice exhibited impaired neuronal cAMP-responsive element binding protein (CREB) phosphorylation and Ca2+/CREB-dependent gene expression. They were also deficient in two forms of synaptic plasticity: long-term potentiation (LTP) in hippocampal CA1 neurons and a late phase of long-term depression in cerebellar Purkinje neurons. However, despite impaired LTP and CREB activation, CaMKIV/Gr-deficient mice exhibited no obvious deficits in spatial learning and memory. These results support an important role for CaMKIV/Gr in Ca2+-regulated neuronal gene transcription and synaptic plasticity and suggest that the contribution of other signaling pathways may spare spatial memory of CaMKIV/Gr-deficient mice.

the journal of neuroscience/the journal of neuroscience

Impaired Synaptic Plasticity and cAMP Response Element-Binding Protein Activation in Ca<sup>2+</sup>/Calmodulin-Dependent Protein Kinase Type IV/Gr-Deficient Mice

Impaired Synaptic Plasticity and cAMP Response Element-Binding Protein Activation in Ca2+/Calmodulin-Dependent Protein Kinase Type IV/Gr-Deficient Mice

Impaired Synaptic Plasticity and cAMP Response Element-Binding Protein Activation in Ca²⁺/Calmodulin-Dependent Protein Kinase Type IV/Gr-Deficient Mice