Structure of divalent cation-phosphatidic acid complexes as determined by 31P-NMR.
Structure of divalent cation-phosphatidic acid complexes as determined by 31P-NMR.
复制标题
通过 31 P-NMR 测定的二价阳离子-磷脂酸复合物的结构。
DOI:
10.1016/0005-2736(84)90296-7
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发表时间:
1984
期刊:
影响因子:
--
通讯作者:
Prestegard,JH
中科院分区:
文献类型:
--
作者:
Miner,VW;Prestegard,JH
A comparative study of the structure of various phosphatidic acid-divalent cation complexes has been completed using31P solids NMR methods. These complexes had been implicated as important intermediates in the fusion of phospholipid vesicles and several pieces of evidence had suggested that differences in activity of various ions may stem from structural differences among the complexes. Solids NMR studies using spin one-half nuclei reflect structural properties of molecules through partial averaging of chemical shift tensors. We have found significant differences in the chemical shift tensors observed for Mg, Ca and Cd complexes. Low angle X-ray scattering data were used to assure comparison of similar phases. At low temperatures Ca and Cd complexes exhibit unique phases prohibiting comparison with Mg complexes. At higher temperatures, all complexes exhibit a hexagonal phase, and31P tensors of the complexes in the hexagonal phase can be interpreted using headgroup geometries similar to those found in crystal structures of phospholipids and assuming motional averaging by simple axial motions. Tensors of Ca and Cd complexes are very similar to one another but are significantly broader than those observed for Mg complexes suggesting a more erect headgroup structure. The differences parallel the fusion activities of the ions for which Ca and Cd are similar and significantly enhanced over that of Mg, supporting a structural link to fusion activity.
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DOI:
--
发表时间:
1981
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
R. Van Venetie;A. Verkleij
通讯作者:
A. Verkleij
影响因子:
2.9
作者:
Wittebort,RJ;Blume,A;Huang,TH;DasGupta,SK;Griffin,RG
通讯作者:
Griffin,RG
影响因子:
2.9
作者:
J. Wilschut;N. Düzgüneş;D. Papahadjopoulos
通讯作者:
J. Wilschut;N. Düzgüneş;D. Papahadjopoulos
DOI:
10.1016/0005-2736(77)90275-9
发表时间:
1977-01-01
期刊:
BIOCHIMICA ET BIOPHYSICA ACTA
影响因子:
--
作者:
PAPAHADJOPOULOS, D;VAIL, WJ;LAZO, R
通讯作者:
LAZO, R
DOI:
10.1016/0005-2736(80)90549-0
发表时间:
1980
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Liao,MJ;Prestegard,JH
通讯作者:
Prestegard,JH