| RRC ID |
3197
|
| 著者 |
Oshima T, Wada C, Kawagoe Y, Ara T, Maeda M, Masuda Y, Hiraga S, Mori H.
|
| タイトル |
Genome-wide analysis of deoxyadenosine methyltransferase-mediated control of gene expression in Escherichia coli.
|
| ジャーナル |
Mol Microbiol
|
| Abstract |
Deoxyadenosine methyltransferase (Dam) methylates the deoxyadenine residues in 5'-GATC-3' sequences and is important in many cellular processes in Escherichia coli. We performed a computational analysis of the entire E. coli genome and confirmed that GATC sequences are distributed unevenly in regulatory regions, which suggests that Dam might regulate gene transcription. To test this, a high-density DNA microarray of 4097 E. coli genes was constructed and used to assess the gene expression profiles of the wild type and the dam-16::kam mutant strain grown under four different conditions. We also used two-dimensional electrophoretic analysis of the proteome to assess the protein profiles. The expression of a large number of genes was affected by the dam deficiency. Genes involved in aerobic respiration, stress and SOS responses, amino acid metabolism and nucleotide metabolism were expressed at higher levels in the mutant cells, especially in aerobic conditions. In contrast, transcription of genes participating in anaerobic respiration, flagella biosynthesis, chemotaxis and motility was decreased in the dam mutant strain under both aerobic and low aerobic conditions. Thus, Dam-controlled genes are involved in adjusting the metabolic and respiratory pathways and bacterial motility to suit particular environmental conditions. The promoters of most of these Dam-controlled genes were also found to contain GATC sequences that overlap with recognition sites for two global regulators, fumarate nitrate reduction (Fnr) and catabolite activator protein (CRP). We propose that Dam-mediated methylation plays an important role in the global regulation of genes, particularly those with Fnr and CRP binding sites.
|
| 巻・号 |
45(3)
|
| ページ |
673-95
|
| 公開日 |
2002-8-1
|
| DOI |
10.1046/j.1365-2958.2002.03037.x
|
| PII |
3037
|
| PMID |
12139615
|
| MeSH |
Amino Acids / metabolism
Blotting, Northern
Carrier Proteins
Cyclic AMP Receptor Protein / metabolism
Escherichia coli / genetics*
Escherichia coli / metabolism
Escherichia coli Proteins
Gene Expression Regulation, Bacterial*
Genes, Bacterial
Genome, Bacterial
Iron-Sulfur Proteins
Nucleotides / metabolism
Oligonucleotide Array Sequence Analysis
Periplasmic Binding Proteins / metabolism
Phospholipids / metabolism
Salmonella typhimurium / genetics
Site-Specific DNA-Methyltransferase (Adenine-Specific) / genetics
Site-Specific DNA-Methyltransferase (Adenine-Specific) / metabolism
Site-Specific DNA-Methyltransferase (Adenine-Specific) / physiology*
|
| IF |
3.418
|
| 引用数 |
115
|
|
WOS 分野
|
MICROBIOLOGY
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
| リソース情報 |
| 原核生物(大腸菌) |
ME7815(KK335)
ME7986(MG1655) |
