Sarah Emerson Lee

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The Dbf2 protein kinase functions as part of the mitotic-exit network (MEN), which controls the inactivation of the Cdc28-Clb2 kinase in late mitosis [1]. The MEN includes the Tem1 GTP binding protein; the kinases Cdc15 and Cdc5; Mob1, a protein of unknown function; and the phosphatase Cdc14 [2]. Here we have used Dbf2 kinase activity to investigate the(More)
Learning and memory have been closely linked to strengthening of synaptic connections between neurons (i.e., synaptic plasticity) within the dentate gyrus (DG)-CA3-CA1 trisynaptic circuit of the hippocampus. Conspicuously absent from this circuit is area CA2, an intervening hippocampal region that is poorly understood. Schaffer collateral synapses on CA2(More)
Regulator of G protein signaling 14 (RGS14) is a multifunctional scaffolding protein that integrates G protein and mitogen-activated protein kinase (MAPK) signaling pathways. In the adult mouse brain, RGS14 mRNA and protein are found almost exclusively in hippocampal CA2 neurons. We have shown that RGS14 is a natural suppressor of CA2 synaptic plasticity(More)
Learning and memory are encoded within the brain as biochemical and physical changes at synapses that alter synaptic transmission, a process known as synaptic plasticity. Although much is known about factors that positively regulate synaptic plasticity, very little is known about factors that negatively regulate this process. Recently, the signaling protein(More)
Heterologous expression of alpha(1D)-adrenergic receptors (alpha(1D)-ARs) in most cell types results in intracellular retention and little or no functionality. We showed previously that heterodimerization with alpha(1B)-ARs promotes surface localization of alpha(1D)-ARs. Here, we report that the alpha(1B)-/alpha(1D)-AR interaction has significant effects on(More)
Heterologous expression of 1D-adrenergic receptors ( 1DARs) in most cell types results in intracellular retention and little or no functionality. We showed previously that heterodimerization with 1B-ARs promotes surface localization of 1D-ARs. Here, we report that the 1B-/ 1D-AR interaction has significant effects on the pharmacology and signaling of the(More)
The EP2 and EP4 prostanoid receptor subtypes are G-proteincoupled receptors for prostaglandin E2 (PGE2). Both receptor subtypes are known to couple to the stimulatory guanine nucleotide binding protein (G s) and, after stimulation with PGE2, can increase the formation of intracellular cAMP. In addition, PGE2 stimulation of the EP4 receptor can activate(More)
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