D-丝氨酸与丝氨酸消旋酶
D-Serine and Serine Racemase

DOI: 10.12677/HJBM.2013.32003, PP. 12-16

Keywords: 丝氨酸消旋酶；D-丝氨酸；结构；机理；功能；调控
Serine Racemase, D-Serine, Structure, Function, Mechanism, Regulation

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Abstract:

D-丝氨酸主要存在于哺乳动物的前脑，海马区和纹状体，作为胶质细胞释放的神经递质，作用于NMDA (N-methyl-D-aspartate receptor)受体，引起中枢神经系统中信号的传导。在突触可塑性，学习和记忆等方面起重要作用。丝氨酸消旋酶是一种磷酸吡多醛依赖酶，在ATP和Mg2+的辅助下，通过消旋作用将L型丝氨酸转变为D型丝氨酸。对于神经及精神性疾病，丝氨酸消旋酶可能是一个新的治疗靶点。本文从D-丝氨酸和丝氨酸消旋酶的结构性质，作用机理，功能，调控等方面进行了阐述。
D-serine mainly distributed in the mammalian forebrain, hippocampus and striatum, which as neurotransmit-ters from glial cells, target at NMDA receptors, and cause central nervous system signal transduction. A new neuro-transmitter of D-serine is found playing an important role in synaptic plasticity, learning and memory. Serine racemase (SR) is a pyridoxal 5'-phosphate(PLP)-dependent enzyme that catalyzes the interconversion of L- and D-serine. Serine racemase may be a new target for the neurological and psychiatric diseases. In this review, the recent advances in D-serine and serine racemase with the aspects of structure, function, mechanism and regulation will be discussed.

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