Point mutation in the exoplasmic domain of the erythropoietin receptor resulting in hormone-independent activation and tumorigenicity
Point mutation in the exoplasmic domain of the erythropoietin receptor resulting in hormone-independent activation and tumorigenicity
复制标题
促红细胞生成素受体外质结构域的点突变导致激素非依赖性激活和致瘤性
作者:
A. Yoshimura;G. Longmore;H. Lodish
THE receptors for erythropoietin and other cytokines constitute a new superfamily1–4. They have no tyrosine-kinase or other enzyme motif and their signal-transducing mechanism is unclear. Here we describe two classes of activating mutations in the erythropoietin receptor (EPOR). A single point mutation in the exoplasmic domain enables it to induce hormone-independent cell growth and tumorigenesis after expression in nontumorigenic, interleukin-3-dependent haematopoietic cells. A C-terminal truncation in the cytoplasmic domain of the EPOR renders the receptor hyper-responsive to erythropoietin, but is insufficient to induce hormone-independent growth or tumorigenicity. The activating point mutation retards intracellular transport and turnover of the receptor. These alterations in metabolism and tumorigenicity caused by the EPOR with activating point mutations are similar to those observed in erythropoietin-independent activation of the wild type EPOR by association with gp55, the Friend spleen focus-forming virus glycoprotein5,6.
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DOI:
10.1073/pnas.85.15.5404
发表时间:
1988
影响因子:
11.1
作者:
Bestwick,RK;Kozak,SL;Kabat,D
通讯作者:
Kabat,D
DOI:
10.1073/pnas.87.11.4139
发表时间:
1990
影响因子:
11.1
作者:
Yoshimura,A;D'Andrea,AD;Lodish,HF
通讯作者:
Lodish,HF
影响因子:
8
作者:
Roussel,MF;Downing,JR;Sherr,CJ
通讯作者:
Sherr,CJ
影响因子:
29.7
作者:
Schrader,JW
通讯作者:
Schrader,JW