PMID- 23420842 OWN - NLM STAT- MEDLINE DCOM- 20130530 LR - 20211021 IS - 1083-351X (Electronic) IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 288 IP - 13 DP - 2013 Mar 29 TI - Casein kinase 2 phosphorylation of protein kinase C and casein kinase 2 substrate in neurons (PACSIN) 1 protein regulates neuronal spine formation. PG - 9303-12 LID - 10.1074/jbc.M113.461293 [doi] AB - The PACSIN (protein kinase C and casein kinase 2 substrate in neurons) adapter proteins couple components of the clathrin-mediated endocytosis machinery with regulators of actin polymerization and thereby regulate the surface expression of specific receptors. The brain-specific PACSIN 1 is enriched at synapses and has been proposed to affect neuromorphogenesis and the formation and maturation of dendritic spines. In studies of how phosphorylation of PACSIN 1 contributes to neuronal function, we identified serine 358 as a specific site used by casein kinase 2 (CK2) in vitro and in vivo. Phosphorylated PACSIN 1 was found in neuronal cytosol and membrane fractions. This localization could be modulated by trophic factors such as brain-derived neurotrophic factor (BDNF). We further show that expression of a phospho-negative PACSIN 1 mutant, S358A, or inhibition of CK2 drastically reduces spine formation in neurons. We identified a novel protein complex containing the spine regulator Rac1, its GTPase-activating protein neuron-associated developmentally regulated protein (NADRIN), and PACSIN 1. CK2 phosphorylation of PACSIN 1 leads to a dissociation of the complex upon BDNF treatment and induces Rac1-dependent spine formation in dendrites of hippocampal neurons. These findings suggest that upon BDNF signaling PACSIN 1 is phosphorylated by CK2 which is essential for spine formation. FAU - Schael, Sylvia AU - Schael S AD - Center for Biochemistry, University of Cologne, D-50931, Cologne, Germany. FAU - Nuchel, Julian AU - Nuchel J FAU - Muller, Stefan AU - Muller S FAU - Petermann, Philipp AU - Petermann P FAU - Kormann, Jan AU - Kormann J FAU - Perez-Otano, Isabel AU - Perez-Otano I FAU - Martinez, Sonia Marco AU - Martinez SM FAU - Paulsson, Mats AU - Paulsson M FAU - Plomann, Markus AU - Plomann M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130218 PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Clathrin) RN - 0 (Intracellular Signaling Peptides and Proteins) RN - 0 (Neuropeptides) RN - 0 (Pacsin1 protein, mouse) RN - 0 (Phosphoproteins) RN - 452VLY9402 (Serine) RN - EC 2.7.11.1 (Casein Kinase II) RN - EC 2.7.11.13 (Protein Kinase C) RN - EC 3.6.5.2 (rac1 GTP-Binding Protein) SB - IM MH - Adaptor Proteins, Signal Transducing MH - Animals MH - Brain/metabolism MH - Casein Kinase II/*metabolism MH - Clathrin/metabolism MH - Dendrites MH - Gene Silencing MH - Intracellular Signaling Peptides and Proteins MH - Mice MH - Microscopy, Fluorescence/methods MH - Models, Biological MH - Mutation MH - Neuronal Plasticity MH - Neurons/metabolism MH - Neuropeptides/*metabolism MH - Phosphoproteins/*metabolism MH - Phosphorylation MH - Protein Kinase C/*metabolism MH - Serine/metabolism MH - Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization MH - Synapses/metabolism MH - Synaptic Transmission MH - rac1 GTP-Binding Protein/*metabolism PMC - PMC3611001 EDAT- 2013/02/20 06:00 MHDA- 2013/06/01 06:00 PMCR- 2014/03/29 CRDT- 2013/02/20 06:00 PHST- 2013/02/20 06:00 [entrez] PHST- 2013/02/20 06:00 [pubmed] PHST- 2013/06/01 06:00 [medline] PHST- 2014/03/29 00:00 [pmc-release] AID - S0021-9258(19)35089-6 [pii] AID - M113.461293 [pii] AID - 10.1074/jbc.M113.461293 [doi] PST - ppublish SO - J Biol Chem. 2013 Mar 29;288(13):9303-12. doi: 10.1074/jbc.M113.461293. Epub 2013 Feb 18.