Expression Cloning of lsc, a Novel Oncogene with Structural Similarities to the Dbl Family of Guanine Nucleotide Exchange Factors*
Expression Cloning of lsc, a Novel Oncogene with Structural Similarities to the Dbl Family of Guanine Nucleotide Exchange Factors*
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lsc 的表达克隆,一种与鸟嘌呤核苷酸交换因子 Dbl 家族结构相似的新型癌基因*
DOI:
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发表时间:
1996
影响因子:
4.8
通讯作者:
Robert Kay
中科院分区:
文献类型:
--
作者:
I. Whitehead;R. Khosravi‐Far;H. Kirk;G. Trigo;C. Der;Robert Kay
In a screen for genes with oncogenic potential expressed by the murine B6SUtA1 myeloid progenitor cell line, we isolated a 2.5-kilobase pair cDNA whose expression causes strong morphological transformation and deregulated proliferation of NIH 3T3 cells. The transforming cDNA encodes a truncated protein (designated Lsc) with a region of sequence similarity to the product of the lbc oncogene. This region includes the tandem Dbl homology and pleckstrin homology domains that are hallmarks of the Dbl-like proteins, a family of presumptive or demonstrated guanine nucleotide exchange factors that act on Rho family GTPases. Lsc requires intact Dbl homology and pleckstrin homology domains for its oncogenic activity. The transforming activity of Lsc in NIH 3T3 cells is reduced by cotransfection with p190 (a GTPase activating protein for Rho family GTPases) and the Rho family dominant-negative mutants RhoA(19N), CDC42(17N), and Rac1(17N). These results indicate a role for the Rho family of GTPases in mediating the transforming activity of Lsc and are consistent with the exchange specificities that have been attributed to Dbl family members. The lsc gene is expressed in a variety of tissues and is particularly abundant in hemopoietic tissues (thymus, spleen, and bone marrow). Lsc is a member of a growing family of proteins that may function as activators of Rho family GTPases in a developmental or tissue-specific manner.
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影响因子:
--
作者:
Clark,GJ;Cox,AD;Graham,SM;Der,CJ
通讯作者:
Der,CJ
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Heisterkamp,N;Kaartinen,V;vanSoest,S;Bokoch,GM;Groffen,J
通讯作者:
Groffen,J
影响因子:
56.9
作者:
GULBINS, E;COGGESHALL, KM;ALTMAN, A
通讯作者:
ALTMAN, A
DOI:
10.1016/s0021-9258(18)82362-6
发表时间:
1993-07
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
R. Davis
通讯作者:
R. Davis
影响因子:
11.4
作者:
KATZAV, S;MARTINZANCA, D;BARBACID, M
通讯作者:
BARBACID, M