title: deaD, a new Escherichia coli gene encoding a presumed ATP-dependent RNA helicase, can suppress a mutation in rpsB, the gene encoding ribosomal protein S2.
abstract: We have cloned and sequenced a new gene from Escherichia coli which encodes a 64-kDa protein. The inferred amino acid sequence of the protein shows remarkable similarity to eIF4A, a murine translation initiation factor that has an ATP-dependent RNA helicase activity and is a founding member of the D-E-A-D family of proteins (characterized by a conserved Asp-Glu-Ala-Asp motif). Our new gene, called deaD, was cloned as a gene dosage-dependent suppressor of temperature-sensitive mutations in rpsB, the gene encoding ribosomal protein S2. We suggest that the DeaD protein plays a hitherto unknown role in translation in E. coli.
authors.affiliation: Department of Genetics, Hospital for Sick Children, Toronto, Ontario, Canada.
authors.forename: W M
authors.initials: WM
authors.lastname: Toone
authors.forename: K E
authors.initials: KE
authors.lastname: Rudd
authors.forename: J D
authors.initials: JD
authors.lastname: Friesen
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics*; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D009154:Mutation; D020365:RNA Helicases; D012316:RNA Nucleotidyltransferases / Q000235:genetics*; D012269:Ribosomal Proteins / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D014158:Transcription, Genetic
chemical_list: D012269:Ribosomal Proteins; C030004:ribosomal protein S2; D012316:RNA Nucleotidyltransferases; D020365:RNA Helicases