Activating point mutations in the common beta subunit of the human GM‐CSF, IL‐3 and IL‐5 receptors suggest the involvement of beta subunit dimerization and cell type‐specific molecules in signalling.
Activating point mutations in the common beta subunit of the human GM‐CSF, IL‐3 and IL‐5 receptors suggest the involvement of beta subunit dimerization and cell type‐specific molecules in signalling.
复制标题
人类 GM-CSF、IL-3 和 IL-5 受体的常见 β 亚基的激活点突变表明 β 亚基二聚化和细胞类型特异性分子参与信号传导。
作者:
Brendan J. Jenkins;Richard J D'Andrea;T. Gonda
We have combined retroviral expression cloning with random mutagenesis to identify two activating point mutations in the common signal‐transducing subunit (h beta c) of the receptors for human granulocyte‐macrophage colony‐stimulating factor (GM‐CSF), interleukin (IL)‐3 and IL‐5 by virtue of their ability to confer factor independence on the haemopoietic cell line, FDC‐P1. One mutation (V449E) is located within the transmembrane domain and, by analogy with a similar mutation in the neu oncogene, may act by inducing dimerization of h beta c. The other mutation (I374N) lies in the extracellular, membrane‐proximal portion of h beta c. Neither of these mutants, nor a previously described mutant of h beta c (FI delta, which has a small duplication in the extracellular region), was capable of inducing factor independence in CTLL‐2 cells, while only V449E could induce factor independence in BAF‐B03 cells. These results imply that the extracellular and transmembrane mutations act by different mechanisms. Furthermore, they imply that the mutants, and hence also wild‐type h beta c, interact with cell type‐specific signalling molecules. Models are presented which illustrate how these mutations may act and predict some of the characteristics of the putative receptor‐associated signalling molecules.
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影响因子:
20.3
作者:
Torigoe,T;O'Connor,R;Santoli,D;Reed,JC
通讯作者:
Reed,JC
影响因子:
20.3
作者:
D'Andrea,R;Rayner,J;Moretti,P;Lopez,A;Goodall,GJ;Gonda,TJ;Vadas,M
通讯作者:
Vadas,M
影响因子:
20.3
作者:
Young,DC;Griffin,JD
通讯作者:
Griffin,JD
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Lopez,AF;Vadas,MA;Woodcock,JM;Milton,SE;Lewis,A;Elliott,MJ;Gillis,D;Ireland,R;Olwell,E;Park,LS
通讯作者:
Park,LS
影响因子:
8
作者:
H. Mano;Kozue Mano;Bo Tang;Maria Koehler;T. Yi;D. J. Gilbert;Nancy A. Jenkins;N. G. Copeland;James N. Ihle
通讯作者:
H. Mano;Kozue Mano;Bo Tang;Maria Koehler;T. Yi;D. J. Gilbert;Nancy A. Jenkins;N. G. Copeland;James N. Ihle