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Negative regulation of NMDA receptor-mediated neuronal transmission

Reactome ID: R-HSA-9617324

中文名称

近曲小管碳酸氢盐重吸收

通路描述

肾近曲小管(PT)的主要任务之一是向管腔分泌酸,从而重吸收约80%的滤过碳酸氢根(HCO3-),并生成新的HCO3-以调节血液pH。在管腔中,滤过的HCO3-与H+在CA IV催化下反应生成CO2,该CO2迅速扩散进入管腔细胞,与水结合生成细胞内H+和HCO3-,由溶质载体CA II催化。HCO3-随后通过NBC-1与Na+共同转运进入血液。CA II产生的细胞内H+主要通过NHE-3分泌至管腔。PT通过代谢谷氨酸生成两个NH4+和一个HCO3-,NH4+被排泄至管腔,而新生成的HCO3-被返回血液,参与非挥发性酸的滴定过程。
英文描述
Negative regulation of NMDA receptor-mediated neuronal transmission The duration of NMDA receptor-mediated neuronal transmission can be limited by binding of the activated calmodulin to the activated NMDA receptor. In addition to shortening the NMDA channel pore open state, calmodulin interferes with ACTN2-mediated anchoring of NMDA receptors to the postsynaptic density (Ehlers et al. 1996, Wyszynski et al. 1997). Protein phosphatases PPM1E and PPM1F dephosphorylate activated calcium/calmodulin-dependent kinases (CaMKs), thus halting CaMK-mediated signaling (Ishida, Okuno et al. 1998, Ishida et al. 1998, Kitani et al. 2003).

所含基因

21 个基因