Role of sialic acid in the mobility of membrane proteins containing O-linked oligosaccharides on polyacrylamide gel electrophoresis in sodium dodecyl sulfate.
Role of sialic acid in the mobility of membrane proteins containing O-linked oligosaccharides on polyacrylamide gel electrophoresis in sodium dodecyl sulfate.
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十二烷基硫酸钠聚丙烯酰胺凝胶电泳中唾液酸对含有 O-连接寡糖的膜蛋白迁移率的作用。
DOI:
10.1111/j.1432-1033.1982.tb06478.x
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发表时间:
1982
期刊:
影响因子:
--
通讯作者:
Andersson,LC
中科院分区:
文献类型:
--
作者:
Gahmberg,CG;Andersson,LC
The major sialoglycoprotein of the human red‐cell membrane, glycophorin A, contains 15O‐glycosidically linked oligosaccharides and one N‐glycosidic oligosaccharide. The protein shows a decreased mobility on polyacrylamide gel electrophoresis in sodium dodecyl sulfate after neuraminidase treatment of thc nondenatured protein.The molecular mechanism behind this phenomenon has been elucidated. Neuraminidase treatment of glycophorin A in intact cells or after solubilization in buffers containing Triton X‐100 resulted in conversion of the predominant tetrasaccharideN‐acetylneuraminosylα2 ‐3galactosylβl‐ 3(N‐acetylneuraminosylα2 ‐ 6)‐N‐acetylgalactosamine to the trisaccharide galactosylβl ‐ 3(N‐acetylneuraminosylα2 ‐ 6)‐N‐acetylgalactosamine and the disaccharide galactosylβl ‐ 3‐N‐acetylgalactosamine. After denaturation with sodium dodecyl sulfate,Vibrio choleraeneuraminidase also liberated theN‐acetylgalactosamine‐bound sialic acids. Such treatment resulted in increased electrophoretic mobility.The results show that distal sialic acids linked to galactose are readily available to neuraminidase, and that their negative charge gives an increased electrophoretic mobility in polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate. In contrast, most of thcN‐acetylgalactosamine‐linked sialic acids of glycophorin A are not liberated by neuraminidase without denaturation of the substrate. Like sialic acids of complex‐type oligosaccharides the decreased electrophoretic mobility caused by them is exclusively due to their mass while no significant contribution by the charge was seen.
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DOI:
10.1073/pnas.78.5.2712
发表时间:
1981-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
CLEMETSON, KJ;NAIM, HY;LUSCHER, EF
通讯作者:
LUSCHER, EF
DOI:
--
发表时间:
1971
期刊:
Nature: New biology
影响因子:
--
作者:
M. Bretscher
通讯作者:
M. Bretscher
影响因子:
20.3
作者:
L. Andersson;C. Gahmberg
通讯作者:
C. Gahmberg
影响因子:
4.8
作者:
C. Gahmberg;S. Hakomori
通讯作者:
S. Hakomori
影响因子:
4.8
作者:
H. Yoshima;H. Furthmayr;A. Kobata
通讯作者:
A. Kobata