Dataset Information

The transcriptionally active regions in the genome of Bacillus subtilis.

ABSTRACT: The majority of all genes have so far been identified and annotated systematically through in silico gene finding. Here we report the finding of 3662 strand-specific transcriptionally active regions (TARs) in the genome of Bacillus subtilis by the use of tiling arrays. We have measured the genome-wide expression during mid-exponential growth on rich (LB) and minimal (M9) medium. The identified TARs account for 77.3% of the genes as they are currently annotated and additionally we find 84 putative non-coding RNAs (ncRNAs) and 127 antisense transcripts. One ncRNA, ncr22, is predicted to act as a translational control on cstA and an antisense transcript was observed opposite the housekeeping sigma factor sigA. Through this work we have discovered a long conserved 3' untranslated region (UTR) in a group of membrane-associated genes that is predicted to fold into a large and highly stable secondary structure. One of the genes having this tail is efeN, which encodes a target of the twin-arginine translocase (Tat) protein translocation system.

SUBMITTER: Rasmussen S

PROVIDER: S-EPMC2784878 | biostudies-literature | 2009 Sep

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

The transcriptionally active regions in the genome of Bacillus subtilis.

Rasmussen Simon S Nielsen Henrik Bjørn HB Jarmer Hanne H

Molecular microbiology 20090804 6

The majority of all genes have so far been identified and annotated systematically through in silico gene finding. Here we report the finding of 3662 strand-specific transcriptionally active regions (TARs) in the genome of Bacillus subtilis by the use of tiling arrays. We have measured the genome-wide expression during mid-exponential growth on rich (LB) and minimal (M9) medium. The identified TARs account for 77.3% of the genes as they are currently annotated and additionally we find 84 putativ ...[more]

PMID: 19682248

Similar Datasets

Project description:The majority of all genes have so far been identified and annotated systematically through in silico gene finding. Here we report the finding of 3,217 strand-specific Transcriptionally Active Regions (TARs) in the genome of Bacillus subtilis by the use of tiling arrays. We have measured the genome-wide expression during mid-exponential growth on rich (LB) and minimal (M9) medium. The identified TARs account for 81.5% of the genes as they are currently annotated and additionally we find 44 novel protein-coding genes, 85 putative non-coding RNAs (ncRNAs) and 184 antisense transcripts. Hybridization of labeled genomic DNA (gDNA) has revealed a few thousand regions giving rise to very low signals. These are mostly caused by sequence errors, as is observed in the highly degenerate trp operon and the folding of stable structures such as the regions containing Rho-independent terminators. Through this work we have discovered a group of membrane-associated genes, among these having a long conserved 3â UnTranslated Region (UTR) predicted to fold into a large and highly stable structure. Among these are YwbN, a target of the twin-arginine translocase (Tat) protein translocation system. The transcriptionally active regions were determined at two different conditions, rich medium (Luria Broth) and minimal medium (M9). Cells were harvested at mid-exponential phase (OD600 = 0.5) and each condition were replicated three times. From each replicate RNA was extracted using FastRNA pro blue kit (Qbiogene) and labelled with Cy3 using a strand-specific protocol. The cDNA was hybridized to 385K NimbleGen tiling arrays 'BaSysBio Bsub T1' covering the entire genome with 45-65 nt isothermal probes, spaced by 22 nt on each strand. Additionally genomic DNA was extracted from 4 replicates at OD600 = 0.5, labelled and hybridized to the tiling arrays. These serve as a reference for the mRNA hybridizations. The normalized RNA hybridization signals were used to create segments using a structural change model (Huber et al, 2006) and transcriptionally active regions were identified by a segment joining-scheme.

Dataset Information

The transcriptionally active regions in the genome of Bacillus subtilis.

Publications

The transcriptionally active regions in the genome of Bacillus subtilis.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets