Glycosylation and processing of high-mannose oligosaccharides of thyroid-stimulating hormone subunits: comparison to nonsecretory cell glycoproteins.
Glycosylation and processing of high-mannose oligosaccharides of thyroid-stimulating hormone subunits: comparison to nonsecretory cell glycoproteins.
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促甲状腺激素亚基的高甘露糖寡糖的糖基化和加工:与非分泌细胞糖蛋白的比较。
DOI:
10.1021/bi00315a001
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发表时间:
1984
期刊:
影响因子:
2.9
通讯作者:
B. Weintraub
中科院分区:
文献类型:
--
作者:
C. Ronin;B. Stannard;I. Rosenbloom;J. Magner;B. Weintraub
Thyroid-stimulating hormone (TSH) subunit glycosylation was compared to that of total cell glycoproteins in mouse thyrotropic tumors. Lipid-linked oligosaccharides, total cell glycoproteins, and TSH subunits were labeled with either [3H]mannose, [3H]galactose, or [3H]glucose in pulse and pulse-chase experiments. The various oligosaccharides were isolated respectively by lipid extraction and mild acid hydrolysis, by selective immunoprecipitation, or by acid precipitation followed by trypsin and endoglycosidase H treatment. The nature of the oligosaccharides was assessed by their migration in paper chromatography, their relative incorporation of different precursors, and also their resistance to alpha-mannosidase. At 60 min, lipid-linked oligosaccharides were found to be composed of Glc3-2Man9GlcNAc2, Man9-8GlcNAc2, and Man5GlcNAc2. At 10 or 60 min of labeling, total cell proteins contained Glc3Man9GlcNAc2, Glc1Man9GlcNAc2, Man9GlcNAc2, Glc1Man8GlcNAc2, Man8GlcNAc2, and Man7GlcNAc2. The largest oligosaccharide, Glc3Man9GlcNAc2, had an unusually long half-life of about 2 h. In contrast, no Glc3Man9GlcNAc2 was found either on TSH + alpha subunits or on free beta subunits isolated either by immunoprecipitation or by sodium dodecyl sulfate gel electrophoresis. Instead, primarily Man9GlcNAc2 was found after a 10-min pulse both on TSH + alpha subunits and on beta subunits. When the pulse was followed by a chase up to 2 h, there was a progressive increase in Man8GlcNAc2 in higher amounts on TSH + alpha-subunit carbohydrate chains than on beta subunits.(ABSTRACT TRUNCATED AT 250 WORDS)
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DOI:
10.1016/s0021-9258(18)33332-5
发表时间:
1982-12
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. Byrd;A. Tarentino;F. Maley;P. H. Atkinson;R. B. Trimble
通讯作者:
J. Byrd;A. Tarentino;F. Maley;P. H. Atkinson;R. B. Trimble
DOI:
--
发表时间:
1982
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Krag,SS;Robbins,AR
通讯作者:
Robbins,AR
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Spiro,RG;Spiro,MJ;Bhoyroo,VD
通讯作者:
Bhoyroo,VD
DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Godelaine,D;Spiro,MJ;Spiro,RG
通讯作者:
Spiro,RG
DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
J. Rearick;A. Chapman;S. Kornfeld
通讯作者:
S. Kornfeld