SERCA2a was serotonylated and may regulate sino-atrial node pacemaker activity.

SERCA2a was serotonylated and may regulate sino-atrial node pacemaker activity.
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SERCA2a 被血清酰化,可能调节窦房结起搏器活动。

DOI:
10.1016/j.bbrc.2016.10.082
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发表时间:
2016-11
期刊:
Biochem Biophys Res Commun
影响因子:
--
通讯作者:
Tang Chengchun
Tang Chengchun
中科院分区:
其他
文献类型:
--
作者:
Wang Qingjie;Wang Dong;Yan Gaoliang;Qiao Yong;Sun Ling;Zhu Boqian;Wang Xin;Tang Chengchun

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窦房结(SAN)自律性的调节是心率产生的一个重要机制,但尚未完全了解。近年来的研究表明,细胞内5-HT对蛋白质的酰化在多种生理活动中起着重要作用。尽管如此,蛋白酰化在控制SAN自动性中的功能作用在很大程度上尚未探索。在本研究中,我们筛选了心肌细胞蛋白,发现肌浆网Ca ATP酶2a型(SERCA 2a)可以被腺苷酰化。利用SAN细胞数学模型的模拟研究表明,SERCA 2a泵的Ca 2+亲和力的变化引起心动过速或心动过缓。
The modulation of sino-atrial node (SAN) automaticity is an essential mechanism of heart rate generation that is still not completely understood. Recent studies highlighted the importance of protein serotonylation by intracellular 5-HT during varies physiological actions. Nevertheless, the functional role of protein serotonylation in controlling SAN automaticity is largely unexplored. In this study, we screened the cardiomyocytes proteins and found that sarco(endo)plasmic reticulum Ca ATPase type 2a (SERCA2a) can be serotonylated. Simulation studies using mathematical SAN cell model showed that variation of Ca2+affinity of SERCA2a pump cause either tachycardia or bradycardia.
细胞内5-羟色胺通过蛋白质素化调节胰腺β细胞的胰岛素分泌。
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