Abstract:
:The hpa cluster of Escherichia coli W ATCC 11105 encodes the enzymes involved in the catabolism of 4-hydroxyphenylacetate (4-HPA). The catabolic genes are organized in two operons, the hpaBC operon, which produces the hydroxylase activity, and the meta operon, which encodes the enzymes that cleave the aromatic ring and allows its further metabolism. Using a monocopy or multicopy lacZ reporter system, we have demonstrated that the hydroxylase genes are transcribed from the PBC promoter which is positively regulated by the hpaA gene product. HpaA is activated by 4-HPA, 3-HPA, or phenylacetate and represents a novel member of the AraC/XylS family of regulators that recognizes aromatic effectors. The -35 box of the PBC promoter clearly deviates from the consensus sigma 70 promoters of E. coli, but upstream of this box we observed two direct repeats, a common characteristic of promoters regulated by the AraC family of proteins. The hpaA gene, which appears to form a transcriptional unit with the putative hpaX transport gene, is also expressed from an alternative promoter that is located within the hpaX structural sequence. On the basis of these findings, we propose a working model for the regulation of the unique aromatic catabolic pathway thus far characterized at a molecular level in E. coli. This regulatory circuit opens a new scenario for the development of novel microbiological tools for environmental purposes.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Prieto MA,García JLdoi
10.1006/bbrc.1997.6368subject
Has Abstractpub_date
1997-03-27 00:00:00pages
759-65issue
3eissn
0006-291Xissn
1090-2104pii
S0006291X97963683journal_volume
232pub_type
杂志文章abstract:BACKGROUND:The prognosis of patients after acute kidney injury (AKI) is poor and treatment is limited. AKI is mainly caused by renal ischemia/reperfusion injury (IRI). During the extension phase of IRI, endothelial damage may participate in ischemia and inflammation. Endothelin-1 (ET-1) which is mostly secreted by endo...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.07.121
更新日期:2012-08-24 00:00:00
abstract::We studied the effects of interleukin-6(IL-6) on DNA synthesis and cyclic AMP production in rat thyroid FRTL-5 cells. When cells were incubated with IL-6 in the presence or absence of IGF-I, cell proliferation was not observed. By contrast, IL-6 stimulated DNA synthesis in a dose dependent manner when TSH was added co...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1993.1416
更新日期:1993-04-15 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2006.12.020
更新日期:2007-02-09 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(83)91228-7
更新日期:1983-12-16 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(87)91455-0
更新日期:1987-05-14 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2001.5242
更新日期:2001-07-20 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1996.1794
更新日期:1996-12-04 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1995.2393
更新日期:1995-09-25 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1996.0034
更新日期:1996-01-05 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(90)91217-g
更新日期:1990-09-14 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2020.08.082
更新日期:2020-11-12 00:00:00
abstract::Epidermal growth factor receptor can interact directly with F-actin through an actin-binding domain. In the present study, a mutant EGFR, lacking a previously identified actin-binding domain (ABD 1), was still able to bind elements of the cytoskeleton. A second EGFR actin-binding domain (ABD 2) was identified in the r...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2008.03.138
更新日期:2008-06-13 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.2000.3692
更新日期:2000-10-22 00:00:00
abstract::Neutrophil discharge of calcium into the ambient medium was measured, using an ion-sensitive electrode, after cells were stimulated with phorbol myristate acetate. Dose-dependent calcium efflux was observed over the same range of stimulus concentrations associated with specific granule marker release. Calcium efflux w...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/0006-291x(88)90282-3
更新日期:1988-08-15 00:00:00
abstract::ALIS are large, transient, cytosolic aggregates that serve as storage compartments for ubiquitin-tagged defective ribosomal products. We determined the importance of the protein p62 in the formation of ALIS and demonstrated that two domains of p62-PB1 and UBA-are essential for ALIS assembly. Those two major binding do...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2018.06.153
更新日期:2018-09-18 00:00:00
abstract::Clostridium difficile toxin A (TcdA) is one of the main pathogenic factors released by C. difficile. Due to its potent cytotoxic and proinflammatory activities, we investigated the anti-tumor activity of TcdA. CT26 colorectal cancer cells were challenged with recombinant TcdA, and it was found that TcdA could induce a...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章,收录出版
doi:10.1016/j.bbrc.2012.04.068
更新日期:2012-05-25 00:00:00
abstract::Alveolar rhabdomyosarcoma (aRMS) is a very aggressive sarcoma of children and young adults. Our previous studies have shown that small molecule inhibition of Pdgfra is initially very effective in an aRMS mouse model. However, slowly evolving, acquired resistance to a narrow-spectrum kinase inhibitor (imatinib) was com...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2012.08.092
更新日期:2012-09-28 00:00:00
abstract::We report a rapid method for the covalent modification of commercially available amino-modified DNA oligonucleotides with a cysteine moiety. The resulting DNA-cysteine conjugates are versatile reagents for the efficient preparation of covalent DNA-protein conjugates by means of expressed protein ligation (EPL). The EP...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2005.08.001
更新日期:2005-09-30 00:00:00
abstract::Acetyl-CoA carboxylases (ACCs) have been highlighted as therapeutic targets for obesity and diabetes, as they play crucial roles in fatty acid metabolism. ACC activity is regulated through the short-term mechanism of inactivation by reversible phosphorylation. Here, we report the crystal structures of the biotin carbo...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2009.11.029
更新日期:2010-01-01 00:00:00
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journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2011.12.100
更新日期:2012-01-20 00:00:00
abstract::We have recently reported a novel finding that a candidate tumor suppressor gene prox1 suffered adenosine-to-inosine (A-to-I) RNA mutation without genomic mutation in a subset of human cancer cells and lost its function. Hence, screening of mutations in both cDNA and genomic DNA could be important in the analysis of c...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2007.05.071
更新日期:2007-07-27 00:00:00
abstract::Heterogeneity in transmissible spongiform encephalopathy is thought to have derived from conformational variation in an abnormal isoform of the prion protein (PrPSc). To characterize PrPSc in bovine spongiform encephalopathy (BSE) and scrapie, we analyzed the newly generated N-terminus of PrPSc isoforms by digestion w...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2005.01.065
更新日期:2005-03-25 00:00:00
abstract::Gastric cancer is one of the major causes of cancer death worldwide; however, the mechanism of carcinogenesis is complex and poorly understood. Long non-coding RNA HOTAIR (HOX transcript antisense RNA) recently emerged as a promoter of metastasis in various cancers including gastric cancer. Here we investigated the im...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2014.07.067
更新日期:2014-08-22 00:00:00
abstract::Ceramide, the backbone of sphingolipids, has been reported to be involved in various cellular responses including apoptosis. We recently established and characterized a C2-ceramide-resistant HL-60 subline designated HL-CR. HL-CR cells were resistant to not only ceramide but also anti-cancer drugs including daunorubici...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2004.04.152
更新日期:2004-06-18 00:00:00
abstract::Fatty acid binding protein 4 (FABP4) plays a key role in Fatty acid catabolism in mammals. Findings from our previous studies have indicated that FABP4 neither affect the differentiation of bovine preadipocytes nor does it change the expression of upstream genes. To investigate whether ectopically expressed FABP4 can ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2016.11.067
更新日期:2017-01-08 00:00:00
abstract::The p21(WAF-1) promoter contains binding sites for a number of transcription factors which mediate its activation by a variety of external signals. Moreover, it has been reported that the transcription factors involved in p21(WAF-1) activation by certain signaling factors, like the phorbol ester TPA, may vary in diffe...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(03)00650-8
更新日期:2003-05-16 00:00:00
abstract::The specificity of the endoglycanase associated with the bacteriophage phi SK1 particles was tested on the native capsular polysaccharide produced by Klebsiella pneumoniae serotype SK1 and on three chemically modified polymers derived from it. The primary structure of the SK1 capsular polysaccharide is: [formula: see ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1006/bbrc.1994.1160
更新日期:1994-02-15 00:00:00
abstract::Poly(ADP-ribose) polymerase-1 (PARP-1) is a nuclear enzyme that is involved in DNA repair and activated by DNA damage. When activated, PARP-1 consumes NAD(+) to form ADP-ribose polymers on acceptor proteins. Extensive activation of PARP-1 leads to glycolytic blockade, energy failure, and cell death. These events have ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/s0006-291x(03)01483-9
更新日期:2003-09-05 00:00:00
abstract::This study examines the influence of insoluble matrix components of glioma (astrocytoma) cells on LPS-mediated inducible nitric oxide (NO)/NO synthase (iNOS) induction in microglia cells. Insoluble matrix components prepared from C6 rat glioma cells strongly suppressed iNOS induction and subsequent NO release induced ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2006.06.149
更新日期:2006-09-01 00:00:00
abstract::To explore the estrogen-regulated genes genome-widely in breast cancer, cap analysis of gene expression (CAGE) sequencing was performed in MCF-7 cells under estrogen treatment. Estrogen-regulated expressional changes were found in 1537 CAGE tag clusters (TCs) (⩾1.5 or ⩽0.66-folds). Among them, 15 TCs were situated in ...
journal_title:Biochemical and biophysical research communications
pub_type: 杂志文章
doi:10.1016/j.bbrc.2014.04.033
更新日期:2014-05-09 00:00:00