A gelsolin-like Ca2+-dependent actin-binding domain in villin
A gelsolin-like Ca2+-dependent actin-binding domain in villin
复制标题
绒毛中凝溶胶蛋白样 Ca2 依赖性肌动蛋白结合结构域
作者:
P. Matsudaira;R. Jakes;J. Walker
Villin is an actin-binding protein of relative molecular mass (Mr) 95,000 found in the core bundle of microfilaments in brush border microvilli from intestine1–3. In physiological calcium concentrations (<1 µM), villin crosslinks actin filaments into bundles. However, in free calcium concentrations (>1 µM), villin severs actin filaments into short pieces3–5. To understand how villin can sever and bundle actin filaments, we are studying the molecular basis of villin–actin binding interactions by identifying important actin-binding domains in villin. Here, we report the purification and preliminary characterization of a 44,000-Mr fragment of villin which contains a calcium-dependent actin-severing activity. In addition, the partial amino-acid sequence from the amino terminus of this fragment reveals homology with a 16-residue region near the amino terminus6 of gelsolin, an actin-severing protein found in many cells7–9 and sera10–12. The sequence homology suggests a common structural basis for the calcium-regulated actin-severing properties shared by villin and gelsolin.
影响因子:
3.7
作者:
Snabes,MC;Boyd3rd,AE;Bryan,J
通讯作者:
Bryan,J
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
影响因子:
2.9
作者:
WALSH, TP;WEBER, A;MOOSEKER, MS
通讯作者:
MOOSEKER, MS