DNA Cell Biol. 1990 Nov;9(9):631-5.

Nucleotide sequence and deletion analysis of the polB gene of Escherichia coli.

Chen H, Sun Y, Stark T, Beattie W, Moses RE.

Source

Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030.

Abstract

The polB gene encodes DNA polymerase II in Escherichia coli. The nucleotide sequence shows an open reading frame of 2,304 nucleotides coding for a protein of 88 kD. The protein initiation signal is preceded by a lexA box lying 2 nucleotides from the termination signal of araD, and begins with GUG 75 nucleotides after the termination of araD. The polB gene and the araD gene are transcribed in the same direction. Initiation of protein synthesis was confirmed by peptide sequence. We have also demonstrated that the polB sequence is lacking in some strains. We conclude that DNA polymerase II is not a required protein in the cell. Sequence comparisons show that DNA polymerase II is an alpha-like DNA polymerase.

PMID:: 2261080; [PubMed - indexed for MEDLINE]

Publication Types, MeSH Terms, Substances, Secondary Source ID

Publication Types

Research Support, Non-U.S. Gov't

MeSH Terms

Substances

DNA Polymerase II

Secondary Source ID

GENBANK/M62646

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Cited by 6 PubMed Central articles

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Nucleotide sequence and deletion analysis of the polB gene of Escherichia coli.
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