Biochemical characterization of cholesterol-3-sulfate as the sole effector for the phosphorylation of HMG1 by casein kinase I in vitro.

Biochemical characterization of cholesterol-3-sulfate as the sole effector for the phosphorylation of HMG1 by casein kinase I in vitro.
复制标题

3-硫酸胆固醇作为酪蛋白激酶 I 体外磷酸化 HMG1 的唯一效应物的生化特征。

DOI:
--
复制
发表时间:
2001
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
通讯作者:
K. Ohtsuki
K. Ohtsuki
中科院分区:
--
文献类型:
--
作者:
M. Okano;S. Kano;H. Munakata;K. Ohtsuki

文献摘要

参考文献

被引文献

相似文献

在体外研究了酪蛋白激酶I (CK-I)对高迁移率组蛋白1 (HMG1)的磷酸化作用及其有效效应物(抑制剂和激活剂)。我们发现(i)当与胆固醇-3-硫酸盐(CH-3S)孵育时,CK-I特异性磷酸化HMG1上的苏氨酸残基,但在其他胆固醇相关化合物或其硫酸盐衍生物存在下未检测到HMG1的磷酸化;(ii)这种磷酸化被肝素选择性抑制,但在低剂量(0.1-3微米)下被3',4',7-三羟基异黄酮显著刺激;(iii) CH-3S直接诱导HMG1发生剧烈构象变化。后者的发现为CH-3S如何在体外诱导CK-I磷酸化HMG1提供了一种机制。
Phosphorylation of high mobility group protein 1 (HMG1) by casein kinase I (CK-I) and potent effectors (inhibitors and activators) of this phosphorylation were investigated in vitro. We found that (i) CK-I phosphorylates specifically threonine residues on HMG1 when incubated with cholesterol-3-sulfate (CH-3S), but no phosphorylation of HMG1 is detected in the presence of other cholesterol related compounds or their sulfated derivatives; (ii) this phosphorylation is selectively inhibited by heparin, but stimulated significantly by 3',4',7-trihydroxy-isofavone at low doses (0.1-3 microM); and (iii) CH-3S directly induces a drastic conformational change in HMG1. The latter finding provides a mechanism to explain how CH-3S alone can induce the phosphorylation of HMG1 by CK-I in vitro.
硫酸胆固醇在培养的成纤维细胞中抑制 3-羟基-3-甲基戊二酰辅酶 A 还原酶活性和甾醇合成。
DOI: 10.1016/0167-4889(85)90198-3
发表时间: 1985
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Williams,ML;Hughes-Fulford,M;Elias,PM
通讯作者: Elias,PM
DOI: 10.1210/mend.13.4.0264
发表时间: 1999-04
影响因子: --
作者:
Cheng Cheng Zhang-Cheng;Sacha A. Krieg;D. J. Shapiro
通讯作者: Cheng Cheng Zhang-Cheng;Sacha A. Krieg;D. J. Shapiro
DOI: 10.1016/s0021-9258(18)60501-0
发表时间: 1989-06
期刊: The Journal of biological chemistry
影响因子: --
作者:
H. Flotow;P. Roach
通讯作者: H. Flotow;P. Roach