title: Nucleotide sequence of a major class-III phage-T3 RNA-polymerase promoter located at 98.0% of phage-T3 genetic map.
abstract: The entire nucleotide sequence of a 409-bp HincII fragment, located within the MboI-E fragment on bacteriophage T3 DNA and containing a major class-III T3 RNA polymerase promoter positioned at 98% on the standard T3 genetic map, has been determined. Alignment of this class-III promoter with previously determined T3 RNA polymerase promoters, with start points of transcription (+1) in register, indicates high degree of sequence conservation between position -16 to +6 among all T3 RNA polymerase promoters. The conserved portion of the (-) strand sequence is 5'-A-TA-T-AT-A-C-C-C-T-C-A-C-T-A-A-A-G-G-G-A---3'. This fragment also contains an open reading frame (ORF) with a translational start codon located at position +146 which is preceded by a potential ribosome binding site (RBS). There is more than 70% amino acid-sequence homology between the deduced sequences of the -NH2 terminal region of this putative T3 phage protein and the corresponding protein coded by bacteriophage T7 (protein of T7 gene 19.5).
authors.forename: P
authors.initials: P
authors.lastname: Sarkar
authors.forename: D
authors.initials: D
authors.lastname: Sengupta
authors.forename: S
authors.initials: S
authors.lastname: Basu
authors.forename: U
authors.initials: U
authors.lastname: Maitra
mesh_terms: D001483:Base Sequence; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000235:genetics*; D012321:DNA-Directed RNA Polymerases / Q000235:genetics*; D005814:Genes, Viral; D009693:Nucleic Acid Hybridization; D011401:Promoter Regions, Genetic; D013604:T-Phages / Q000201:enzymology / Q000235:genetics*
chemical_list: D004279:DNA, Viral; D012321:DNA-Directed RNA Polymerases; D004262:DNA Restriction Enzymes