Spectroscopic studies of a phosphoinositide-binding peptide from gelsolin: behavior in solutions of mixed solvent and anionic micelles.
Spectroscopic studies of a phosphoinositide-binding peptide from gelsolin: behavior in solutions of mixed solvent and anionic micelles.
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凝溶胶蛋白中磷酸肌醇结合肽的光谱研究:混合溶剂和阴离子胶束溶液中的行为。
DOI:
10.1016/s0006-3495(95)80140-2
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
Braunlin,WH
中科院分区:
文献类型:
--
作者:
Xian,W;Vegners,R;Janmey,PA;Braunlin,WH
The peptide G(150–169) corresponds to a phosphatidylinositol 4,5-bisphosphate (PIP2) and filamentous actin (F-actin) binding site on gelsolin (residues 150–169, with the sequence KHVVPNEVVVQRLFQVKGRR). The conformation of this peptide in trifluoroethanol (TFE) aqueous solution was determined by 1H nuclear magnetic resonance as the first step toward understanding the structural aspects of the interaction of G(150–169) and PIP2. The circular dichroism experiments show that G(150–169) adopts a predominantly alpha-helical form in both 50% TFE aqueous solution and in the presence of PIP2 micelles, therefore establishing a connection between the two conformations. 1H nuclear magnetic resonance experiments of G(150–169) in TFE co-solvent show that the helical region extends from Pro-154 to Lys-166. The amphiphilic nature of this helical structure may be the key to understanding the binding of the peptide to lipids. Sodium dodecyl sulfate micelle solution is used as a model for anionic lipid environments. Preliminary studies of the conformation of G(150–169) in sodium dodecyl sulfate micelle solution show that the peptide forms an alpha-helix similar to but with some structural differences from that in TFE co-solvent. Fluorescence experiments provide evidence of peptide clustering over a narrow range of peptide/PIP2 ratios, which is potentially relevant to the biological function of PIP2.
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DOI:
--
发表时间:
1990
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
P. Pasta;G. Carrea;R. Longhi;L. Zetta
通讯作者:
L. Zetta
影响因子:
64.8
作者:
P. Janmey
通讯作者:
P. Janmey
DOI:
10.1016/s0021-9258(19)49772-x
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
P. Janmey;J. Lamb;P. G. Allen;P. Matsudaira
通讯作者:
P. Janmey;J. Lamb;P. G. Allen;P. Matsudaira
DOI:
--
发表时间:
1986
期刊:
Proteins
影响因子:
--
作者:
J. W. Nelson;N. Kallenbach
通讯作者:
J. W. Nelson;N. Kallenbach
影响因子:
2.2
作者:
MACURA, S;HUANG, Y;ERNST, RR
通讯作者:
ERNST, RR