The ras superfamily proteins - PubMed (original) (raw)
Review
The ras superfamily proteins
P Chardin. Biochimie. 1988 Jul.
Abstract
Several recent discoveries indicate that the ras genes, frequently activated to a transforming potential in some human tumours, belong to a large family that can be divided into three main branches: the first branch represented by the ras, ral and rap genes; the second branch, by the rho genes; and the third branch, by the rab genes. The C-terminal end of the encoded proteins always includes a cystein, which may become fatty-acylated, suggesting a sub-membrane localization. The ras superfamily proteins share four regions of high homology corresponding to the GTP binding site; however, even in these regions, significant differences are found, suggesting that the various proteins may possess slightly different biochemical properties. Recent reports show that some of these proteins play an essential role in the control of physical processes such as cell motility, membrane ruffling, endocytosis and exocytosis. Nevertheless, the characterization of the proteins directly interacting with the ras or ras-related gene-products will be required to precisely understand their function.
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