PMID:6248541

Citation	Ficht, TA and Moyer, RW (1980) Isolation and characterization of a putative bacteriophage T5 transcription.replication enzyme complex from infected Escherichia coli. J. Biol. Chem. 255:7040-8
Abstract	A well defined enzyme comples of approximately 5 X 10(6) daltons that contains phage and host cell components known to be required for the processes of phage transcription and DNA replication has been isolated from bacteriophage T5-infected Escherichia coli cells. In addition to the RNA polymerase of the host cell, the complex contains the phage-encoded: gpC2 which has been implicated genetically as a controlling element of late transcription; gpD9, the DNA polymerase required for T5 DNA replication; the proteins gpD5 (DNA-binding protein), and gpD15 (nuclease) which are both known to be essential for T5 DNA replication and for the initiation of late transcription. The viral gpD5 derived from the purified complex is a phosphoprotein. The enzyme complex also contains, protected from the action of nuclease, double-stranded DNA with an approximate molecular weight of 1 to 2 X 10(6) (2 to 3% of the size of the T5 genome) which is derived preferentially from the center of the T5 DNA molecule. The composition of the enzyme complex suggests that the processes of transcription and replication are integrated in T5-infected cells.
Links	PubMed
Keywords	DNA Helicases/isolation & purification; DNA Replication; DNA-Directed DNA Polymerase/isolation & purification; DNA-Directed RNA Polymerases/isolation & purification; Deoxyribonucleases/isolation & purification; Escherichia coli/enzymology; Molecular Weight; Multienzyme Complexes/isolation & purification; Phosphoproteins/isolation & purification; T-Phages/enzymology; Transcription, Genetic; Virus Replication
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Annotations

Gene product	Qualifier	GO Term	Evidence Code	with/from	Aspect	Extension	Notes	Status
BPT5:EXO5		GO:0019034: viral replication complex	ECO:0000315:		C		Fig. 11 shows the comparison of T5amD15 mutants and T5 wild type strains. This figure predicts that D15 plays a role in replication and transcription and may be an enzyme that modifies the T5 DNA.	complete CACAO 12039

References

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