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Enhancement of RNA polymerase III transcription by the E1A gene product of adenovirus. 1985

W K Hoeffler, and R G Roeder

Nuclear extracts from adenovirus-infected HeLa cells harvested early in infection demonstrated a markedly increased capacity for transcription by RNA polymerase III of exogenous VA RNA genes, as well as cloned tRNA and 5S RNA genes. In contrast, no enhanced transcription was observed in extracts from cells infected with an E1A deletion mutant. Moreover, cells co-transfected with the VA- and E1A-containing plasmids showed markedly higher levels of VA RNA synthesis than did cells transfected with the VA-containing plasmid alone. Although analysis of high ionic strength extracts revealed that the enhancement of pol III transcription persists late in infection, moderate ionic strength extracts indicated that transcription factor IIIC becomes limiting. Chromatographic fractionation and complementation analysis of extracts from mock- and virus-infected cells indicated that the factor(s) responsible for the enhanced activity was localized entirely in the fraction containing transcription factor IIIC.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D009994 Osmolar Concentration The concentration of osmotically active particles in solution expressed in terms of osmoles of solute per liter of solution. Osmolality is expressed in terms of osmoles of solute per kilogram of solvent. Ionic Strength,Osmolality,Osmolarity,Concentration, Osmolar,Concentrations, Osmolar,Ionic Strengths,Osmolalities,Osmolar Concentrations,Osmolarities,Strength, Ionic,Strengths, Ionic
D005814 Genes, Viral The functional hereditary units of VIRUSES. Viral Genes,Gene, Viral,Viral Gene
D006367 HeLa Cells The first continuously cultured human malignant CELL LINE, derived from the cervical carcinoma of Henrietta Lacks. These cells are used for, among other things, VIRUS CULTIVATION and PRECLINICAL DRUG EVALUATION assays. Cell, HeLa,Cells, HeLa,HeLa Cell
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000260 Adenoviruses, Human Species of the genus MASTADENOVIRUS, causing a wide range of diseases in humans. Infections are mostly asymptomatic, but can be associated with diseases of the respiratory, ocular, and gastrointestinal systems. Serotypes (named with Arabic numbers) have been grouped into species designated Human adenovirus A-G. APC Viruses,APC Virus,Adenovirus, Human,Human Adenovirus,Human Adenoviruses
D012320 RNA Polymerase III A DNA-dependent RNA polymerase present in bacterial, plant, and animal cells. It functions in the nucleoplasmic structure where it transcribes DNA into RNA. It has specific requirements for cations and salt and has shown an intermediate sensitivity to alpha-amanitin in comparison to RNA polymerase I and II. DNA-Dependent RNA Polymerase III,RNA Polymerase C,DNA Dependent RNA Polymerase III,Polymerase C, RNA,Polymerase III, RNA
D012321 DNA-Directed RNA Polymerases Enzymes that catalyze DNA template-directed extension of the 3'-end of an RNA strand one nucleotide at a time. They can initiate a chain de novo. In eukaryotes, three forms of the enzyme have been distinguished on the basis of sensitivity to alpha-amanitin, and the type of RNA synthesized. (From Enzyme Nomenclature, 1992). DNA-Dependent RNA Polymerases,RNA Polymerases,Transcriptases,DNA-Directed RNA Polymerase,RNA Polymerase,Transcriptase,DNA Dependent RNA Polymerases,DNA Directed RNA Polymerase,DNA Directed RNA Polymerases,Polymerase, DNA-Directed RNA,Polymerase, RNA,Polymerases, DNA-Dependent RNA,Polymerases, DNA-Directed RNA,Polymerases, RNA,RNA Polymerase, DNA-Directed,RNA Polymerases, DNA-Dependent,RNA Polymerases, DNA-Directed
D012367 RNA, Viral Ribonucleic acid that makes up the genetic material of viruses. Viral RNA
D014157 Transcription Factors Endogenous substances, usually proteins, which are effective in the initiation, stimulation, or termination of the genetic transcription process. Transcription Factor,Factor, Transcription,Factors, Transcription

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