Purification and characterization of angiotensin-binding protein from porcine liver cytosolic fraction.

Purification and characterization of angiotensin-binding protein from porcine liver cytosolic fraction.
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猪肝胞质组分中血管紧张素结合蛋白的纯化和表征。

DOI:
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发表时间:
1989
期刊:
European Journal of Biochemistry
影响因子:
--
通讯作者:
S. Hirose
S. Hirose
中科院分区:
--
文献类型:
--
作者:
H. Hagiwara;N. Sugiura;K. Wakita;S. Hirose

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在猪肝细胞质中发现了一种与血管紧张素结合的高亲和力蛋白质,纯化至表观均一性并进行了表征。这种蛋白质被命名为可溶性血管紧张素结合蛋白(sABP),以区别于存在于质膜上的血管紧张素II受体。通过硫酸铵分级分离、疏水层析、离子交换层析、羟基磷灰石柱层析和Mono Q离子交换层析的组合实现蛋白的纯化。使用125 I-血管紧张素II测量的特异性血管紧张素结合活性富集超过3400倍。SDS/聚丙烯酰胺凝胶电泳纯化的sABP产生一个单一的75 kDa的蛋白带,在良好的协议与亲和标记估计的分子量。sABP在对还原剂的敏感性和对血管紧张素类似物的亲和力方面与血管紧张素II受体非常相似([Sar 1,Ala 8]血管紧张素II大于血管紧张素III大于血管紧张素II大于血管紧张素I),表明sABP和血管紧张素II受体的配体结合位点之间可能相似。为了获得其生理作用的线索,我们检查了sABP的组织分布,发现这种蛋白质不仅广泛分布在外周器官中,而且还分布在大脑中。
A protein that binds angiotensins with high affinity was found in porcine liver cytosol, purified to apparent homogeneity and characterized. The protein was named soluble angiotensin-binding protein (sABP) to distinguish it from angiotensin II receptors present on plasma membranes. Purification of the protein was achieved by a combination of ammonium sulfate fractionation, hydrophobic chromatography, ion-exchange chromatography, hydroxylapatite column chromatography and Mono Q ion-exchange chromatography. Specific angiotensin-binding activity, as measured using 125I-angiotensin II, was enriched more than 3400-fold. SDS/polyacrylamide gel electrophoresis of the purified sABP yielded a single 75-kDa protein band, in good agreement with the molecular mass estimated by affinity labeling. sABP was very similar to the angiotensin II receptor in its sensitivity to reducing agents and in its affinities for angiotensin analogues ([Sar1, Ala8]angiotensin II greater than angiotensin III greater than angiotensin II greater than angiotensin I), suggesting a possible similarity between the ligand-binding sites of sABP and the angiotensin II receptor. To obtain a clue to its physiological role(s), we examined the tissue distribution of sABP and found that this protein is widely distributed not only in the peripheral organs but also in the brain.
血管紧张素 II 与大鼠肾上腺膜结合位点的共价交联。
DOI: 10.1073/pnas.79.12.3739
发表时间: 1982
影响因子: 11.1
作者:
Paglin,S;Jamieson,JD
通讯作者: Jamieson,JD
DOI: 10.1016/0005-2736(85)90350-5
发表时间: 1985
期刊: Biochimica et biophysica acta
影响因子: --
作者:
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兔肝中可溶性血管紧张素 II 结合蛋白的纯化和特性。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Kiron,MA;Soffer,RL
通讯作者: Soffer,RL
来自兔肝脏的可溶性血管紧张素 II 结合蛋白。
DOI: 10.1016/0006-291x(88)90616-x
发表时间: 1988
影响因子: 3.1
作者:
Rosenberg,E;RaviKiron,MA;Soffer,RL
通讯作者: Soffer,RL
从肝脏中分离血管紧张素 II 结合蛋白。
DOI: 10.1073/pnas.81.6.1679
发表时间: 1984
影响因子: 11.1
作者:
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通讯作者: Soffer,RL