PMID- 27097102 OWN - NLM STAT- MEDLINE DCOM- 20171212 LR - 20180118 IS - 1549-4918 (Electronic) IS - 1066-5099 (Linking) VI - 34 IP - 8 DP - 2016 Aug TI - Quantitative Phosphoproteomic Study Reveals that Protein Kinase A Regulates Neural Stem Cell Differentiation Through Phosphorylation of Catenin Beta-1 and Glycogen Synthase Kinase 3beta. PG - 2090-101 LID - 10.1002/stem.2387 [doi] AB - Protein phosphorylation is central to the understanding of multiple cellular signaling pathways responsible for regulating the self-renewal and differentiation of neural stem cells (NSCs). Here we performed a large-scale phosphoproteomic analysis of rat fetal NSCs using strong cation exchange chromatography prefractionation and citric acid-assisted two-step enrichment with TiO2 strategy followed by nanoLC-MS/MS analysis. Totally we identified 32,546 phosphosites on 5,091 phosphoproteins, among which 23,945 were class I phosphosites, and quantified 16,000 sites during NSC differentiation. More than 65% of class I phosphosites were novel when compared with PhosphoSitePlus database. Quantification results showed that the early and late stage of NSC differentiation differ greatly. We mapped 69 changed phosphosites on 20 proteins involved in Wnt signaling pathway, including S552 on catenin beta-1 (Ctnnb1) and S9 on glycogen synthase kinase 3beta (Gsk3beta). Western blotting and real-time PCR results proved that Wnt signaling pathway plays critical roles in NSC fate determination. Furthermore, inhibition and activation of PKA dramatically affected the phosphorylation state of Ctnnb1 and Gsk3beta, which regulates the differentiation of NSCs. Our data provides a valuable resource for studying the self-renewal and differentiation of NSCs. Stem Cells 2016;34:2090-2101. CI - (c) 2016 AlphaMed Press. FAU - Wang, Shuxin AU - Wang S AD - State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Beijing, Peoples' Republic of China. FAU - Li, Zheyi AU - Li Z AD - State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Beijing, Peoples' Republic of China. FAU - Shen, Hongyan AU - Shen H AD - State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Beijing, Peoples' Republic of China. FAU - Zhang, Zhong AU - Zhang Z AD - State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Beijing, Peoples' Republic of China. FAU - Yin, Yuxin AU - Yin Y AD - Institute of Systems Biomedicine, Peking University Health Science Center, Peking University, Beijing, Peoples' Republic of China. FAU - Wang, Qingsong AU - Wang Q AD - State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Beijing, Peoples' Republic of China. FAU - Zhao, Xuyang AU - Zhao X AD - Institute of Systems Biomedicine, Peking University Health Science Center, Peking University, Beijing, Peoples' Republic of China. FAU - Ji, Jianguo AU - Ji J AD - State Key Laboratory of Protein and Plant Gene Research, College of Life Sciences, Beijing, Peoples' Republic of China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160510 PL - England TA - Stem Cells JT - Stem cells (Dayton, Ohio) JID - 9304532 RN - 0 (Phosphoproteins) RN - 0 (beta Catenin) RN - 5688UTC01R (Tretinoin) RN - EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta) RN - EC 2.7.11.11 (Cyclic AMP-Dependent Protein Kinases) SB - IM MH - Amino Acid Motifs MH - Amino Acid Sequence MH - Animals MH - *Cell Differentiation/drug effects MH - Cyclic AMP-Dependent Protein Kinases/*metabolism MH - Fetus/cytology MH - Gene Ontology MH - Glycogen Synthase Kinase 3 beta/*metabolism MH - Mice MH - Molecular Sequence Annotation MH - Neural Stem Cells/*cytology/drug effects/metabolism MH - Phosphoproteins/chemistry/*metabolism MH - Phosphorylation/drug effects MH - Proteomics/*methods MH - Rats MH - Tretinoin/pharmacology MH - Wnt Signaling Pathway/drug effects MH - beta Catenin/*metabolism OTO - NOTNLM OT - Neural stem cells OT - Phosphoproteomics OT - Protein kinase A OT - TiO2 OT - Wnt signaling pathway EDAT- 2016/04/21 06:00 MHDA- 2017/12/13 06:00 CRDT- 2016/04/21 06:00 PHST- 2015/10/24 00:00 [received] PHST- 2016/03/26 00:00 [accepted] PHST- 2016/04/21 06:00 [entrez] PHST- 2016/04/21 06:00 [pubmed] PHST- 2017/12/13 06:00 [medline] AID - 10.1002/stem.2387 [doi] PST - ppublish SO - Stem Cells. 2016 Aug;34(8):2090-101. doi: 10.1002/stem.2387. Epub 2016 May 10.