Rho small G protein and cytoskeletal control.

Y. Takai, K. Kaibuchi, T. Sasaki, K. Tanaka, H. Shirataki, H. Nakanishi

Research output: Contribution to journalReview articlepeer-review

17 Citations (Scopus)


The Rho family belongs to the Ras-related small GTP-binding protein (G protein) superfamily and regulates various cell functions in which the actomyosin system is involved, including cell morphology, membrane ruffling, cell motility, cell aggregation, cytokinesis, smooth muscle contraction, and yeast budding. Three GDP/GTP exchange proteins (GEPs), named Smg GDS, Dbl, and Rho GDI, and two GTPase activating proteins (GAPs), named Rho GAP and p190 associated with Ras GAP, have been identified. The Rho activity is likely to be regulated by protein kinase C which is linked through phospholipase C to the tyrosine kinase-type membrane receptors and the heterotrimeric G protein-linked receptors. It is likely that both Ras and Rho receive signals from the membrane receptors through different pathways and transduce signals to genes and cytoskeleton, respectively. In carcinogenesis, mutational activation of any component in the Ras signaling pathway may cause abnormal cell proliferation, whereas mutational activation of any component in the Rho signaling pathway may cause invasiveness and metastasis of carcinoma cells.

Original languageEnglish
Pages (from-to)338-350
Number of pages13
JournalPrincess Takamatsu symposia
Publication statusPublished - 1994
Externally publishedYes


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