Covalent complexes formed between plasma gelsolin and actin with a zero-length cross-linking compound.

Covalent complexes formed between plasma gelsolin and actin with a zero-length cross-linking compound.
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血浆凝溶胶蛋白和肌动蛋白与零长度交联化合物之间形成共价复合物。

DOI:
10.1021/bi00344a047
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发表时间:
1985
期刊:
影响因子:
2.9
通讯作者:
H. Harris
H. Harris
中科院分区:
生物学3区
文献类型:
--
作者:
H. Harris

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肌动蛋白和血浆凝溶胶蛋白与零长度交联剂1-乙基-3-[3-(二甲氨基)丙基]碳二亚胺共价交联。两个主要的分子间连接的产品被确定在聚丙烯酰胺凝胶。通过使用14 C-标记的肌动蛋白和125 I-标记的凝溶胶蛋白,这些被证明是1:1和2:1的肌动蛋白与凝溶胶蛋白的复合物,分别。较高分子量的复合物占主导地位的所有条件下测试,包括存在和不存在的Ca 2+。在滴定实验中,肌动蛋白在不同浓度的反应与一个固定的浓度的凝溶胶蛋白,端点得到的形成两个交联的物种在约两个肌动蛋白每凝溶胶蛋白,这意味着2:1的非共价复合物交联。在0.1 mM Ca 2+,交联的程度是独立的蛋白质浓度下降到50 nM凝溶胶蛋白。在低Ca 2+浓度(小于10(-8)M)下,交联程度在微摩尔凝溶胶蛋白时大大降低,在约100 nM凝溶胶蛋白时降至零。因此,肌动蛋白与凝溶胶蛋白结合形成交叉结合复合物在0.1 mM Ca 2+时非常强,但在低Ca 2+浓度时弱得多。
Actin and plasma gelsolin were covalently cross-linked with the zero-length cross-linker 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide. Two major intermolecularly linked products were identified on polyacrylamide gels. By use of 14C-labeled actin and 125I-labeled gelsolin, these were shown to be the 1:1 and 2:1 complexes of actin with gelsolin, respectively. The higher molecular weight complex predominated under all conditions tested including the presence and absence of Ca2+. In titration experiments in which actin at different concentrations was reacted with a fixed concentration of gelsolin, end points were obtained for the formation of both cross-linked species at about two actins per gelsolin, implying that a 2:1 noncovalent complex is cross-linked. In 0.1 mM Ca2+, the extent of cross-linking was independent of protein concentration down to 50 nM gelsolin. At low Ca2+ concentrations (less than 10(-8)M), the extent of cross-linking was very much reduced at micromolar gelsolin and fell to zero at about 100 nM gelsolin. The binding of actin to gelsolin to give a cross-linkable complex is therefore very strong at 0.1 mM Ca2+ but much weaker at low Ca2+ concentrations.
使用凝胶覆盖技术鉴定大鼠组织中的 G 肌动蛋白结合蛋白。
DOI: 10.1016/0014-4827(83)90324-5
发表时间: 1983
影响因子: 3.7
作者:
Snabes,MC;Boyd3rd,AE;Bryan,J
通讯作者: Bryan,J
凝溶胶蛋白的细胞质和分泌变体的结构和生物合成。
DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
作者:
Yin,HL;Kwiatkowski,DJ;Mole,JE;Cole,FS
通讯作者: Cole,FS
DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
作者:
Doi,Y;Frieden,C
通讯作者: Frieden,C