کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10816623 | 1058582 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
TIM, a Dbl-related protein, regulates cell shape and cytoskeletal organization in a Rho-dependent manner
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The Dbl-like guanine nucleotide exchange factors (GEFs) have been implicated in direct activation of the Rho family of small GTPases. We previously isolated transforming immortalized mammary (TIM) as a Dbl-like protein. Here, we show that, when expressed in cells, TIM was a potent activator of RhoA. Like activated Rho proteins, expression of TIM potentiated the serum response factor (SRF)- and AP-1-regualted transcriptional activities and activated the SAPK/JNK signaling pathway. In NIH 3T3 cells, TIM induced transforming foci, which was inhibited by the ROCK inhibitor Y-27632 or the dominant negative mutants of Rho proteins. Expression of TIM led to pronounced changes in cell shape and organization of the actin cytoskeleton, including the formation of thick stress fibers at the cell periphery and cell rounding. TIM also promoted redistribution of vinculin-enriched focal adhesions at the cell periphery and increased the phosphorylation of myosin light chain (MLC). These results, taken together, suggest that TIM acts as an upstream regulator for the RhoA/ROCK-mediated cellular functions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cellular Signalling - Volume 17, Issue 4, April 2005, Pages 461-471
Journal: Cellular Signalling - Volume 17, Issue 4, April 2005, Pages 461-471
نویسندگان
Xiaozhen Xie, Stephen W. Chang, Takashi Tatsumoto, Andrew M.L. Chan, Toru Miki,