Isolation and characterization of 5T4, a tumour‐associated antigen

Isolation and characterization of 5T4, a tumour‐associated antigen
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肿瘤相关抗原 5T4 的分离和表征

DOI:
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发表时间:
1990
影响因子:
6.4
通讯作者:
P. Stern
P. Stern
中科院分区:
医学1区
文献类型:
--
作者:
N. Hole;P. Stern

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单克隆抗体(MAb)5T4定义了在正常成人组织中具有有限表达模式的人滋养层抗原标志物,但该抗原在多种癌上表达。描述了通过凝集素和免疫亲和层析以及凝胶过滤的组合从术语合体滋养层纯化5T4抗原分子,得到高达10,000倍的纯化,产率为70%。抗原由非相关糖蛋白分子携带,SDS-PAGE上的表观分子量为72 kDa,呈中性pI。通过N-聚糖酶去除N-连接的糖揭示了42 kDa的核心蛋白。用切割O-连接糖的酶处理基本上不会改变分子大小。天然5T4分子对蛋白水解具有很强的抗性,直到N-连接糖被去除或糖蛋白变性和还原。通过这些方法产生的糖肽将适合于氨基酸测序。
The monoclonal antibody (MAb) 5T4 defines a human trophoblast antigen marker with a restricted pattern of expression in normal adult tissues but this antigen is expressed on a variety of carcinomas. The purification of 5T4 antigenic molecules is described from term syncytiotrophoblast by a combination of lectin‐ and immunoaffinity chromatography and gel filtration giving up to 10,000‐fold purification with 70% yield. The antigen is carried by non‐associated glycoprotein molecules with an apparent molecular weight of 72 kDa on SDS‐PAGE and a neutral pl. Removal of N‐linked sugars by N‐glycanase reveals a core protein of 42 kDa. Treatment with enzymes that cleave O‐linked sugars does not substantially alter the molecular size. The native 5T4 molecules are very resistant to proteolysis until the N‐linked sugars are removed or the glycoprotein is denatured and reduced. Glycopeptides generated by these approaches will be suitable for amino acid sequencing.
DOI: --
发表时间: 1984-09
期刊: The Journal of biological chemistry
影响因子: --
作者:
T. Plummer;J. Elder;S. Alexander;A. W. Phelan;A. Tarentino
通讯作者: T. Plummer;J. Elder;S. Alexander;A. W. Phelan;A. Tarentino
DOI: 10.1042/bj2410615
发表时间: 1987
期刊: The Biochemical journal
影响因子: --
作者:
Low,MG;Futerman,AH;Ackermann,KE;Sherman,WR;Silman,I
通讯作者: Silman,I
正常滋养层细胞抵抗 I 类 HLA 的诱导。
DOI: --
发表时间: 1987
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Hunt,JS;Andrews,GK;Wood,GW
通讯作者: Wood,GW
DOI: 10.1073/pnas.85.9.3110
发表时间: 1988-05-01
影响因子: 11.1
作者:
RETTIG, WJ;GARINCHESA, P;OLD, LJ
通讯作者: OLD, LJ