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Spinophilin, a dendritic spine-enriched scaffold protein, modulates synaptic transmission via multiple functions mediated by distinct domains of the protein. Here, we show that spinophilin is a key modulator of opiate action. Knockout of the spinophilin gene causes reduced sensitivity to the analgesic effects of morphine and early development of tolerance but a higher degree of physical dependence...
Neurabin and spinophilin are homologous protein phosphatase 1 and actin binding proteins that regulate dendritic spine function. A yeast two-hybrid analysis using the coiled-coil domain of neurabin revealed an interaction with Lfc, a Rho GEF. Lfc was highly expressed in brain, where it interacted with either neurabin or spinophilin. In neurons, Lfc was largely found in the shaft of dendrites in association...
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