» Articles » PMID: 3054811

Visualization and Quantitative Analysis of Complex Formation Between E. Coli RNA Polymerase and an RRNA Promoter in Vitro

Overview
Specialty Biochemistry
Date 1988 Oct 25
PMID 3054811
Citations 53
Authors
Affiliations
Soon will be listed here.
Abstract

We have established conditions that stabilize the interaction between RNA polymerase and the rrnB P1 promoter in vitro. The requirements for quantitative complex formation are unusual for E. coli promoters: (1) The inclusion of a competitor is required to allow visualization of a specific footprint. (2) Low salt concentrations are necessary since complex formation is salt sensitive. (3) The addition of the initiating nucleotides ATP and CTP, resulting in a low rate of dinucleotide production, is required in order to prevent dissociation of the complexes. The complex has been examined using DNAase I footprinting and filter binding assays. It is characterized by a region protected from DNAase I cleavage that extends slightly upstream of the region protected by RNA polymerase in most E. coli promoters. We find that only one mole of active RNA polymerase is required per mole of promoter DNA in order to detect filter-bound complexes. Under the conditions measured, the rate of association of RNA polymerase with rrnB P1 is as rapid as, or more rapid than, that reported for any other E. coli or bacteriophage promoter.

Citing Articles

Structural origins of RNA polymerase open promoter complex stability.

Saecker R, Chen J, Chiu C, Malone B, Sotiris J, Ebrahim M Proc Natl Acad Sci U S A. 2021; 118(40).

PMID: 34599106 PMC: 8501879. DOI: 10.1073/pnas.2112877118.


Mechanism of transcription initiation and promoter escape by . RNA polymerase.

Henderson K, Felth L, Molzahn C, Shkel I, Wang S, Chhabra M Proc Natl Acad Sci U S A. 2017; 114(15):E3032-E3040.

PMID: 28348246 PMC: 5393250. DOI: 10.1073/pnas.1618675114.


The dual role of DksA protein in the regulation of Escherichia coli pArgX promoter.

Lyzen R, Maitra A, Milewska K, Kochanowska-Lyzen M, Hernandez V, Szalewska-Palasz A Nucleic Acids Res. 2016; 44(21):10316-10325.

PMID: 27915292 PMC: 5137449. DOI: 10.1093/nar/gkw912.


Reducing Ribosome Biosynthesis Promotes Translation during Low Mg Stress.

Pontes M, Yeom J, Groisman E Mol Cell. 2016; 64(3):480-492.

PMID: 27746019 PMC: 5500012. DOI: 10.1016/j.molcel.2016.05.008.


Open complex scrunching before nucleotide addition accounts for the unusual transcription start site of E. coli ribosomal RNA promoters.

Winkelman J, Chandrangsu P, Ross W, Gourse R Proc Natl Acad Sci U S A. 2016; 113(13):E1787-95.

PMID: 26976590 PMC: 4822585. DOI: 10.1073/pnas.1522159113.


References
1.
Peacock A, DINGMAN C . Molecular weight estimation and separation of ribonucleic acid by electrophoresis in agarose-acrylamide composite gels. Biochemistry. 1968; 7(2):668-74. DOI: 10.1021/bi00842a023. View

2.
Szoke P, Allen T, deHaseth P . Promoter recognition by Escherichia coli RNA polymerase: effects of base substitutions in the -10 and -35 regions. Biochemistry. 1987; 26(19):6188-94. DOI: 10.1021/bi00393a035. View

3.
McClure W, Cech C, Johnston D . A steady state assay for the RNA polymerase initiation reaction. J Biol Chem. 1978; 253(24):8941-8. View

4.
Glaser G, CASHEL M . In vitro transcripts from the rrn B ribosomal RNA cistron originate from two tandem promoters. Cell. 1979; 16(1):111-21. DOI: 10.1016/0092-8674(79)90192-2. View

5.
Gilbert S, DE BOER H, Nomura M . Identification of initiation sites for the in vitro transcription of rRNA operons rrnE and rrnA in E. coli. Cell. 1979; 17(1):211-24. DOI: 10.1016/0092-8674(79)90309-x. View