Sulfation and phosphorylation of the neural cell adhesion molecule, N-CAM.

Sulfation and phosphorylation of the neural cell adhesion molecule, N-CAM.
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神经细胞粘附分子 N-CAM 的硫酸化和磷酸化。

DOI:
10.1126/science.6474186
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发表时间:
1984
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Cunningham,BA
Cunningham,BA
中科院分区:
--
文献类型:
--
作者:
Sorkin,BC;Hoffman,S;Edelman,GM;Cunningham,BA

文献摘要

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鸡胚脑组织在含有35 S标记的硫酸盐或32 P标记的磷酸盐的培养基中培养,35 S或32 P标记成神经细胞粘附分子(N-CAM)。35 S标记位于两种糖肽(分子量,170,000和140,000)上的天冬酰胺连接的碳水化合物中,但不在唾液酸中。在两种多肽羧基末端三分之一的磷酸化氨基酸中检测到32 P标记,但磷酸丝氨酸与磷酸苏氨酸的比例在两个物种中不同。硫酸化的丝氨酸和磷酸氨基酸可以为N-CAM的功能控制提供额外的位点。
Embryonic chicken brain tissue cultured in media containing35S-labeled sulfate or32P-labeled phosphate incorporated35S or32P into the neural cell adhesion molecule (N-CAM). The35S label was located in asparagine-linked carbohydrates on both glycopeptides (molecular weights, 170,000 and 140,000) but not in the sialic acid. The32P label was detected in phosphoamino acids in the carboxyl-terminal third of both polypeptides, but the ratio of phosphoserine to phosphothreonine differed in the two species. The sulfated saccharides and phosphoamino acids may provide additional sites for functional control of N-CAM.