Sequences of four new heat-shock (HS) genes of Escherichia coli organized into two operons were determined. The operon at 83 min specifies two proteins of 15.8 kDa (HslT) and 16.1 kDa (HslS), which are identical to IbpA and IbpB, respectively. Expression of mRNA from a sigma 32-dependent promoter of the hslTS/ibpAB operon is stimulated 30-75-fold upon temperature upshift. The transcription start point (tsp) is located at a G, 96 bp upstream from the AUG start codon of hslT/ibpA. The deduced amino acid sequences of HslT/IbpA and HslS/IbpB are 48% identical to each other and were found to be remotely related to the chloroplast low-molecular-weight HS protein, which is highly conserved among plants. The second hs operon is much less actively stimulated by temperature upshift, although it has a hs promoter that perfectly matches the consensus of promoters recognized by sigma 32. Located at 88.9 min, the hslVU operon specifies proteins of 19.1 kDa (HslV) and 49.6 kDa (HslU). Multiple tsp were found in this operon. HslV is remotely related to the eukaryotic proteasome proteins, and HslU is very similar to a Pasteurella haemolytica protein of unknown function. Both HslU and the P. haemolytica protein share a ATP/GTP-binding motif near their N-termini. The two operons described here are transcribed counterclockwise on the standard genetic map.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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