Compilation and Analysis of Bacillus Subtilis Sigma A-dependent Promoter Sequences: Evidence for Extended Contact Between RNA Polymerase and Upstream Promoter DNA
Overview
Authors
Affiliations
Sequence analysis of 236 promoters recognized by the Bacillus subtilis sigma A-RNA polymerase reveals an extended promoter structure. The most highly conserved bases include the -35 and -10 hexanucleotide core elements and a TG dinucleotide at position -15, -14. In addition, several weakly conserved A and T residues are present upstream of the -35 region. Analysis of dinucleotide composition reveals A2- and T2-rich sequences in the upstream promoter region (-36 to -70) which are phased with the DNA helix: An tracts are common near -43, -54 and -65; Tn tracts predominate at the intervening positions. When compared with larger regions of the genome, upstream promoter regions have an excess of An and Tn sequences for n > 4. These data indicate that an RNA polymerase binding site affects DNA sequence as far upstream as -70. This sequence conservation is discussed in light of recent evidence that the alpha subunits of the polymerase core bind DNA and that the promoter may wrap around RNA polymerase.
Dos Santos Ferreira M, Pendleton A, Yeo W, Malaga Gadea F, Camelo D, McGuire M Mol Microbiol. 2024; 121(5):865-881.
PMID: 38366323 PMC: 11167679. DOI: 10.1111/mmi.15237.
Mishra A, Hughes A, Amon J, Rudner D, Wang X, Kearns D J Mol Biol. 2023; 436(4):168419.
PMID: 38141873 PMC: 11462632. DOI: 10.1016/j.jmb.2023.168419.
Bacillus subtilis NrnB is expressed during sporulation and acts as a unique 3'-5' exonuclease.
Myers T, Ingle S, Weiss C, Sondermann H, Lee V, Bechhofer D Nucleic Acids Res. 2023; 51(18):9804-9820.
PMID: 37650646 PMC: 10570053. DOI: 10.1093/nar/gkad662.
Extraordinary long-stem confers resistance of intrinsic terminators to processive antitermination.
Miguel-Arribas A, Martin-Maria A, Alaerds E, Val-Calvo J, Yuste L, Rojo F Nucleic Acids Res. 2023; 51(12):6073-6086.
PMID: 37125647 PMC: 10325885. DOI: 10.1093/nar/gkad333.
A cryptic oxidoreductase safeguards oxidative protein folding in .
Reardon-Robinson M, Nguyen M, Sanchez B, Osipiuk J, Ruckert C, Chang C Proc Natl Acad Sci U S A. 2023; 120(8):e2208675120.
PMID: 36787356 PMC: 9974433. DOI: 10.1073/pnas.2208675120.