title: Isolation of rsp-1, a novel cDNA capable of suppressing v-Ras transformation.
abstract: Using an expression cloning assay, we have isolated a novel cDNA, referred to as rsp-1, which suppresses the v-Ras-transformed phenotype. When introduced into NIH 3T3 fibroblasts under the control of a metallothionein promoter, rsp-1 confers resistance to v-Ras, but not to v-Mos or v-Src, and inhibits growth of the cells. The rsp-1 cDNA contains a 831-bp open reading frame encoding a 277-amino-acid leucine-rich protein. The rsp-1 cDNA exhibits no significant homology to sequences in the DNA data bases. However, searches of the protein data bases revealed that it contains a series of leucine-based repeats which are homologous to the leucine repeats found in the regulatory region of the yeast adenylyl cyclase. rsp-1 specific RNA is detectable in a wide variety of cell lines and tissues, and the gene is conserved among eukaryotic species. These data suggest that rsp-1 plays a role in Ras signal transduction.
authors.affiliation: Laboratory of Tumor Immunology and Biology, National Cancer Institute, Bethesda, Maryland 20892.
authors.forename: M L
authors.initials: ML
authors.lastname: Cutler
authors.forename: R H
authors.initials: RH
authors.lastname: Bassin
authors.forename: L
authors.initials: L
authors.lastname: Zanoni
authors.forename: N
authors.initials: N
authors.lastname: Talbot
mesh_terms: D016475:3T3 Cells; D000262:Adenylyl Cyclases / Q000235:genetics; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D015139:Blotting, Southern; D002455:Cell Division; D002460:Cell Line; D002471:Cell Transformation, Neoplastic / Q000235:genetics*; D003001:Cloning, Molecular; D004247:DNA; D005809:Genes, Regulator; D011905:Genes, ras; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D010641:Phenotype; D012441:Saccharomyces cerevisiae / Q000201:enzymology; D012568:Schizosaccharomyces / Q000201:enzymology; D012689:Sequence Homology, Nucleic Acid; D015398:Signal Transduction; D014157:Transcription Factors / Q000235:genetics*
chemical_list: C484099:Rsu1 protein, mouse; D014157:Transcription Factors; C076224:RSU1 protein, human; D004247:DNA; D000262:Adenylyl Cyclases