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Wang J, Qu D, Bu L, Zhu S. Inactivation efficiency of P. Aeruginosa and ARGs removal in UV/NH2Cl process: Comparisons with UV and NH2Cl. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Islam MA, Beardall J, Cook P. Intra-strain Variability in the Effects of Temperature on UV-B Sensitivity of Cyanobacteria. Photochem Photobiol 2018; 95:306-314. [DOI: 10.1111/php.13014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/28/2018] [Indexed: 10/28/2022]
Affiliation(s)
- Md Ashraful Islam
- School of Biological Sciences; Monash University; Clayton Vic. Australia
| | - John Beardall
- School of Biological Sciences; Monash University; Clayton Vic. Australia
| | - Perran Cook
- School of Chemistry; Monash University; Clayton Vic. Australia
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Shen SG, Guo RJ, Yan RR, Wu YK, Zhao DX, Lin YH, Lv HX, Jia SR, Han PP. Comparative proteomic analysis of Nostoc flagelliforme reveals the difference in adaptive mechanism in response to different ultraviolet-B radiation treatments. Mol Biol Rep 2018; 45:1995-2006. [PMID: 30269247 DOI: 10.1007/s11033-018-4355-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 09/03/2018] [Indexed: 12/01/2022]
Abstract
Nostoc flagelliforme is a pioneer organism in the desert and highly resistant to ultraviolet B (UV-B) radiation, while the involved adaptive mechanism has not been fully explored yet. To elucidate the responsive mechanism, two doses of UV-B radiation (low: 1 W/m2 and high: 5 W/m2) were irradiated for 6 h and 48 h, respectively, and their effects on global metabolism in N. flagelliforme were comprehensively investigated. In this study, we used iTRAQ-based proteomic approach to explore the proteomes of N. flagelliforme, and 151, 172, 124 and 148 differentially expressed proteins were identified under low and high UV-B doses for 6 h and 48 h, respectively. Functional classification analysis showed these proteins were mainly involved in photosynthesis, amino acid metabolism, antioxidant activity and carbohydrate metabolism. Further analysis revealed that UV-B imposed restrictions on primary metabolism including photosynthesis, Calvin cycle, and amino acid metabolism, and cells started defense mechanism through repair of DNA and protein damage, increasing antioxidant activity, and accumulating extracellular polysaccharides to minimize the damage. Moreover, high UV-B dose imposed more severe restrictions and activated stronger defense mechanism compared with low dose. The results would improve the understanding of molecular mechanisms of UV-B-stress adaption in N. flagelliforme.
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Affiliation(s)
- Shi-Gang Shen
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Rong-Jun Guo
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Rong-Rong Yan
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Yi-Kai Wu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Dong-Xue Zhao
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Ya-Hui Lin
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - He-Xin Lv
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China
| | - Shi-Ru Jia
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China.
| | - Pei-Pei Han
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, State Key Laboratory of Food Nutrition and Safety, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People's Republic of China.
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Rastogi RP, Sinha RP, Moh SH, Lee TK, Kottuparambil S, Kim YJ, Rhee JS, Choi EM, Brown MT, Häder DP, Han T. Ultraviolet radiation and cyanobacteria. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 141:154-69. [DOI: 10.1016/j.jphotobiol.2014.09.020] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 09/22/2014] [Accepted: 09/25/2014] [Indexed: 12/13/2022]
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Wiczk J, Miloch J, Rak J. DHPLC and MS studies of a photoinduced intrastrand cross-link in DNA labeled with 5-bromo-2'-deoxyuridine. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 130:86-92. [PMID: 24300995 DOI: 10.1016/j.jphotobiol.2013.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 10/29/2013] [Accepted: 11/05/2013] [Indexed: 10/26/2022]
Abstract
It is well known that the replacement of thymidine with 5-bromo-2'-deoxyuridine (BrdU) in DNA sensitizes it to UVB light. Irradiation of a biopolymer substituted in such a way leads to manifold kinds of DNA damage, such as intrastrand cross-links, single- and double-strand breaks or alkali-labile sites that were studied in the past with a broad spectrum of analytical methods. Here, we demonstrate that completely denaturing high-performance liquid chromatography (DHPLC), underestimated so far in DNA damage studies, could act as an inexpensive, and high-resolution substitute for the commonly employed gel electrophoresis. We report on the DHPLC/mass spectrometry (MS) analyses of photolytes obtained with the UV irradiation of aqueous solutions containing 40 base pairs of a long, double-stranded oligonucleotide labeled with BrdU in one of its strands. The UV-product was detected by HPLC at a temperature of 70°C. Subsequent MS analysis with electrospray ionization (ESI-MS) of the photolyte, enzymatic digestion of the irradiated material and HPLC and MS analysis (LC-MS) of the digest demonstrated unequivocally that an intrastrand covalent dimer, involving adenine and uracil, is formed in the irradiated system.
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Affiliation(s)
- Justyna Wiczk
- Department of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Justyna Miloch
- Department of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland
| | - Janusz Rak
- Department of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland.
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Kumar A, Tyagi MB, Jha PN. Evidences showing ultraviolet-B radiation-induced damage of DNA in cyanobacteria and its detection by PCR assay. Biochem Biophys Res Commun 2004; 318:1025-30. [PMID: 15147976 DOI: 10.1016/j.bbrc.2004.04.129] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2004] [Indexed: 11/16/2022]
Abstract
Impact of ultraviolet-B radiation in causing the damages to the DNA of the cyanobacterium, Anabaena strain BT2 has been investigated. Exposure of genomic DNA (in vitro) to UV-B radiation for 1 h did not cause any shift in the absorption peak (lambda(max)) but more than 30% increase in absorbance was noticed in comparison to untreated control DNA (no exposure to UV-B). This increase in absorbance in a way may be comparable to typical hypochromic effect but there was no decrease in absorbance following transfer of UV-B-treated DNA to fluorescent light or in the dark. That the damaging effect of UV-B radiation on native structure of DNA is indeed real was also evident from the PCR-based assay such as RAPD, rDNA amplification, and ARDRA. Template activity of UV-B-treated genomic DNA was drastically inhibited, there was no amplification in RAPD assay after prior exposure of DNA to UV-B for 60 min. Only one band of approximately 400 bp was observed even after 60 min of exposure which suggests that certain segment of DNA strand is resistant to UV-B effects. Similar to the effects on RAPD profile, amplification of rDNA was significantly inhibited following exposure of genomic DNA to UV-B. Our findings clearly demonstrate that UV-B does affect the DNA of cyanobacteria and the killings of these microbes might be due to the irreversible damages caused to DNA by this high energy radiation. It is felt that PCR assay may be conveniently used for screening the damages caused to DNA by UV-B radiation in cyanobacteria and other microorganisms.
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Affiliation(s)
- Ashok Kumar
- Microbial Biotechnology Unit, School of Biotechnology, Banaras Hindu University, Varanasi 221 005, India.
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Abstract
Increases in ultraviolet radiation at the Earth's surface due to the depletion of the stratospheric ozone layer have recently fuelled interest in the mechanisms of various effects it might have on organisms. DNA is certainly one of the key targets for UV-induced damage in a variety of organisms ranging from bacteria to humans. UV radiation induces two of the most abundant mutagenic and cytotoxic DNA lesions such as cyclobutane-pyrimidine dimers (CPDs) and 6-4 photoproducts (6-4PPs) and their Dewar valence Isomers. However, cells have developed a number of repair or tolerance mechanism to counteract the DNA damage caused by UV or any other stressors. Photoreactivation with the help of the enzyme photolyase is one of the most important and frequently occurring repair mechanisms in a variety of organisms. Excision repair, which can be distinguished into base excision repair (BER) and nucleotide excision repair (NER), also plays an important role in DNA repair in several organisms with the help of a number of glycosylases and polymerases, respectively. In addition, mechanisms such as mutagenic repair or dimer bypass, recombinational repair, cell-cycle checkpoints, apoptosis and certain alternative repair pathways are also operative in various organisms. This review deals with UV-induced DNA damage and the associated repair mechanisms as well as methods of detecting DNA damage and its future perspectives.
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Affiliation(s)
- Rajeshwar P Sinha
- Institut für Botanik und Pharmazeutische Biologie, Friedrich-Alexander-Universität, Staudtstr. 5, D-91058 Erlangen, Germany
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Owttrim GW, Coleman JR. Regulation of expression and nucleotide sequence of the Anabaena variabilis recA gene. J Bacteriol 1989; 171:5713-9. [PMID: 2507530 PMCID: PMC210419 DOI: 10.1128/jb.171.10.5713-5719.1989] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The expression of the cyanobacterial recA gene, isolated from Anabaena variabilis, has been examined at the levels of transcript and protein abundance. Exposure of the cyanobacterium to a variety of DNA-damaging agents, including mitomycin C, methyl methanesulfonate, and UV irradiation, results in a rapid increase in the abundance of the recA transcript above basal levels as determined by Northern (RNA) blot analysis. A concomitant increase in the abundance of a 37- to 38-kilodalton polypeptide was also detected by Western (immuno-) blot analysis of soluble cyanobacterial polypeptides using polyclonal antiserum directed against the Escherichia coli recA protein. The cyanobacterial polypeptide is of the same molecular mass as that synthesized by an in vitro, DNA-directed procaryotic transcription-translation system primed with an A. variabilis genomic fragment containing the recA gene. Nucleotide sequence analysis of the cyanobacterial gene revealed a protein of 358 amino acids with a molecular weight of 38,403 daltons. The A. variabilis and E. coli recA genes share similarity at 58% of the amino acid residues; however, an E. coli-like lexA repressor-binding site is not present in the A. variabilis promoter region. The similarities of A. variabilis and E. coli recA expression and gene sequence are discussed.
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Affiliation(s)
- G W Owttrim
- Department of Botany, University of Toronto, Ontario, Canada
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Abstract
Strains of the filamentous cyanobacteria Anabaena spp. were capable of very efficient photoreactivation of UV irradiation-induced damage to DNA. Cells were resistant to several hundred joules of UV irradiation per square meter under conditions that allowed photoreactivation, and they also photoreactivated UV-damaged cyanophage efficiently. Reactivation of UV-irradiated cyanophage (Weigle reactivation) also occurred; UV irradiation of host cells greatly enhanced the plaque-forming ability of irradiated phage under nonphotoreactivating conditions. Postirradiation incubation of the host cells under conditions that allowed photoreactivation abolished the ability of the cells to perform Weigle reactivation of cyanophage N-1. Mitomycin C also induced Weigle reactivation of cyanophage N-1, but nalidixic acid did not. The inducible repair system (defined as the ability to perform Weigle reactivation of cyanophages) was relatively slow and inefficient compared with photoreactivation.
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