Citation:
	            
		            SUN  Hao, JIANG  Yong-Jun, YU  Qing-Sen, GAO  Hui. Molecular Dynamics Simulations on the Role of Structural Mg2+ Ions in Phosphoryl Transfer Catalyzed by GSK-3β[J]. Acta Physico-Chimica Sinica,
							;2011, 27(01): 207-212.
						
							doi:
								10.3866/PKU.WHXB20110116
						
					
				
					
				
	        
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Glycogen synthase kinase-3β(GSK-3β) is a kind of serine/threonine protein kinase. It regulates the synthesis of glycogen and plays an important part in several signal pathways. It is believed to be an important target for a number of diseases such as diabetes, cancers, chronic inflammation, and Alzheimer's disease. Mg2+ ions are conserved structural metal ions in GSK-3β and they interact with adenosine-triphosphate (ATP). They are very important in phosphoryl transfer in the kinase. In this paper, the effect of two Mg2+ ions (Mg2+I, Mg2+II) on GSK-3β is illustrated. Mg2+ can stabilize the conformation of GSK-3β and ATP. Without Mg2+, the stabilization of GSK-3β reduces explicitly and the conformation of ATP changes. Mg2+I is important in the phosphorylation reaction while Mg2+II is essential and Lys183 alone cannot maintain the conformation of ATP without the assistance of Mg2+II . ATP forms intramolecular hydrogen bonds and adopts a folded conformation when both Mg2+I and Mg2+II are absent.
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