Abstract:
:Burkholderia sp. strain AK-5 converts 4-aminophenol to maleylacetic acid via 1,2,4-trihydroxybenzene, which is unstable in vitro and non-enzymatically auto-oxidized to 2-hydroxy-1,4-benzoquinone. Crude extract of strain AK-5 retarded the auto-oxidation and reduced the substrate analogue, 2,6-dimethoxy-1,4-benzoquinone, in the presence of NADH. The two enzymes responsible were purified to homogeneity. The deduced amino acid sequence of the enzyme that inhibited the auto-oxidation showed a high level of identity to sequences of iron-containing superoxide dismutases (Fe-SODs) and contained a conserved metal-ion-binding site; the purified enzyme showed superoxide dismutase activity and contained 1 mol of Fe per mol of enzyme, identifying it as Fe-SOD. Among three type SODs tested, Fe-SOD purified here inhibited the auto-oxidation most efficiently. The other purified enzyme showed a broad substrate specificity toward benzoquinones, including 2-hydroxy-1,4-benzoquinone, converting them to the corresponding 1,4-benzenediols; the enzyme was identified as 2-hydroxy-1,4-benzoquinone reductase. The deduced amino acid sequence did not show a high level of identity to that of benzoquinone reductases from bacteria and fungi that degrade chlorinated phenols or nitrophenols. The indirect role of Fe-SOD in 1,2,4-trihydroxybenzene metabolism is probably to scavenge and detoxify reactive species that promote the auto-oxidation of 1,2,4-trihydroxybenzene in vivo. The direct role of benzoquinone reductase would be to convert the auto-oxidation product back to 1,2,4-trihydroxybenzene. These two enzymes together with 1,2,4-trihydroxybenzene 1,2-dioxygenase convert 1,2,4-trihydroxybenzene to maleylacetic acid.
journal_name
Biodegradationjournal_title
Biodegradationauthors
Takenaka S,Koshiya J,Okugawa S,Takata A,Murakami S,Aoki Kdoi
10.1007/s10532-010-9369-5subject
Has Abstractpub_date
2011-02-01 00:00:00pages
1-11issue
1eissn
0923-9820issn
1572-9729journal_volume
22pub_type
杂志文章相关文献
BIODEGRADATION文献大全abstract::A novel bacterial strain capable of degrading the pyrethroid pesticide fenpropathrin was isolated from mixed wastewater and sludge samples. Phylogenetic analysis of the 16S rDNA sequence revealed that the organism belongs to the genus Clostridium. The organism can co-metabolically transform fenpropathrin at 100 mg l(-...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-010-9444-y
更新日期:2011-09-01 00:00:00
abstract::Three identical upflow laboratory-scale biofilters, inoculated with the benzene-degrading strain Pseudomonas sp. NCIMB 9688 but filled up with different packing media (PM), specifically raw sugarcane bagasse, sieved sugarcane bagasse and peat, were employed to eliminate benzene from waste air. Biofilters performances ...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1023/b:biod.0000015613.91044.a4
更新日期:2004-04-01 00:00:00
abstract::In contaminated soils, efficiency of natural attenuation or engineered bioremediation largely depends on biodegradation capacities of the local microflorae. In the present study, the biodegradation capacities of various microflorae towards diesel oil were determined in laboratory conditions. Microflorae were collected...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-005-9028-4
更新日期:2006-12-01 00:00:00
abstract::The biodegradation of rubber particles in rubber-soil mixtures at different rubber contents was monitored by the carbon dioxide production. The cumulative carbon dioxide production was modelled according to a two parameter exponential function. The model provides an excellent fit (R2 > 0.98) for the observed data. The...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/BF00115746
更新日期:1996-08-01 00:00:00
abstract::Many Pseudomonads are able to use linear alkanes as sole carbon and energy source. The genetics and enzymology of alkane metabolism have been investigated in depth for Pseudomonas oleovorans, which is able to oxidize C5-C12 n-alkanes by virtue of two gene regions, localized on the OCT-plasmid. The so-called alk-genes ...
journal_title:Biodegradation
pub_type: 杂志文章,评审
doi:10.1007/BF00696457
更新日期:1994-12-01 00:00:00
abstract::Carbon supplementation, soil moisture and soil aeration are believed to enhance in situ bioremediation of PAH-contaminated soils by stimulating the growth of indigenous microorganisms. However, the effects of added carbon and nitrogen together with soil moisture and soil aeration on the dissipation of PAHs and on asso...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-009-9291-x
更新日期:2010-04-01 00:00:00
abstract::Reductive dechlorination is an advantageous process to microorganisms under anaerobic conditions because it is an electron sink, thereby allowing reoxidation of metabolic intermediates. In some organisms this has been demonstrated to support growth. Many chlorinated compounds have now been shown to be reductively dech...
journal_title:Biodegradation
pub_type: 杂志文章,评审
doi:10.1007/BF00695971
更新日期:1993-01-01 00:00:00
abstract::Anaerobic pretreated paper process water was characterized in terms of readily biodegradable, slowly biodegradable, very slowly biodegradable and inert wastewater fractions under mesophilic and thermophilic conditions. The anaerobic pretreated paper process water contained a relatively high amount of slowly biodegrada...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1023/a:1021277305333
更新日期:2002-01-01 00:00:00
abstract::Microbial adhesion is an important factor that can influence biodegradation of poorly water soluble hydrocarbons such as phenanthrene. This study examined how adhesion to an oil-water interface, as mediated by 1-dodecanol, enhanced phenanthrene biodegradation by Pseudomonas fluorescens LP6a. Phenanthrene was dissolved...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-010-9421-5
更新日期:2011-06-01 00:00:00
abstract::A field experiment, lasting 14 months, was carried out in order to assess the effect of organic amendment and lime addition on the bioavailability of heavy metals in contaminated soils. The experiment took place in a soil affected by acid, highly toxic pyritic waste from the Aznalcóllar mine (Seville, Spain) in April ...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1023/a:1024288505979
更新日期:2003-06-01 00:00:00
abstract::The potential toxicity of the s-triazine herbicide atrazine motivates continuous bioremediation-directed research. Several indigenous soil atrazine-catabolizing microbial associations and monocultures have been enriched/isolated from compromised sites. Of these, Pseudomonas sp. strain ADP has become a reference strain...
journal_title:Biodegradation
pub_type: 杂志文章,评审
doi:10.1023/a:1016329628618
更新日期:2002-01-01 00:00:00
abstract::Soil contamination by hydrocarbons, especially by used lubricating oil, is a growing problem in developing countries, which poses a serious threat to the environment. Phytoremediation of these contaminated soils offers environmental friendly and a cost effective method for their remediation. Hibiscus cannabinus was st...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-011-9506-9
更新日期:2012-04-01 00:00:00
abstract::Hydroxyquinol, a common metabolite of aromatic compounds, is readily auto-oxidized to hydroxyquinone. Enzymatic activities that metabolized hydroxyquinone were observed from the cell extracts of Sphingobium chlorophenolicum ATCC 39723. An enzyme capable of transforming hydroxyquinone was partially purified, and its ac...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-004-2058-5
更新日期:2005-08-01 00:00:00
abstract::The performance of diesel oil degradation by Candida tropicalis immobilized on various conventional matrices (sodium alginate, carboxyl methyl cellulose, chitosan) and biowaste materials (wheat bran, sawdust, peanut hull powder) was investigated using the method of entrapment and physical adsorption. The yeast species...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-011-9473-1
更新日期:2011-11-01 00:00:00
abstract::Aerosol delivery was evaluated for distributing biostimulation and bioaugmentation amendments in vadose zones. This technique involves transporting amendments as micron-scale aerosol droplets in injected gas. Microcosm experiments were designed to characterize reductive dechlorination of trichloroethene (TCE) under un...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-015-9718-5
更新日期:2015-04-01 00:00:00
abstract::A novel bacterial species identified as Exiguobacterium sp. RD3 degraded the diazo dye reactive yellow 84A (50 mg l(-1)) within 48 h at static condition, at 30 degrees C and pH 7. Lower salinity conditions were found to be favorable for growth and decolorization. Enzymatic activities of an H(2)O(2) independent oxidase...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-008-9217-z
更新日期:2009-04-01 00:00:00
abstract::A large-scale (19.8L) Fluidized Bed Reactor (FBR) operated for 592 days was used to assess the removal performance of linear alkylbenzene sulfonate (LAS). Adjustments in hydraulic retention time (HRT) (18 and 30 h), ethanol (50, 100, 200 mg L-1) and linear alkylbenzene sulfonate (LAS) concentration (6.3-24.7 mg L-1) w...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-020-09895-x
更新日期:2020-04-01 00:00:00
abstract::Benzoyl coenzyme A reductase (BCR) catalyzes dearomatization of benzoyl coenzyme A (benzoyl-CoA), which is the central step in the anaerobic degradative pathways for a variety of aromatic compounds. This study developed a PCR method for the detection and quantification of BCR genes in bacterial strains and environment...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-005-0826-5
更新日期:2005-12-01 00:00:00
abstract::A Monte Carlo model was developed to characterize the molecular composition of polychlorinated alkane mixtures. The model is based upon a simulation of the free-radical chlorination process by which polychlorinated alkane mixtures are produced industrially from n-alkanes. In the model, the free-radical chlorination re...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-007-9099-5
更新日期:2007-12-01 00:00:00
abstract::Forty-five fenobucarb-degrading bacteria were isolated from rice paddy soils, and their genetic and phenotypic characteristics were investigated. The isolates were able to utilize fenobucarb as a sole source of carbon and energy. Analysis of the 16S rRNA gene sequence indicated that all the isolates were related to me...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-013-9667-9
更新日期:2014-06-01 00:00:00
abstract::Continuous bioremediation of gasoline-contaminated water in a packed-bed biobarrier system under oxygen-limited conditions is discussed. This study was part of an extensive effort to develop an alternative technology for the in situ bioremediation of hydrocarbons where there is a limited supply of oxygen. Protruded st...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1023/a:1008327815105
更新日期:1999-01-01 00:00:00
abstract::The capacity of the beta-Proteobacterium Pseudomonas sp. strain P51, which degrades chlorinated benzenes, to metabolize 1,2,4-trichlorobenzene (TCB) under environmental conditions was tested by its release into two experimental systems. The first system consisted of laboratory scale microcosms which were operated with...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1023/a:1008368006917
更新日期:1999-04-01 00:00:00
abstract::The performance of an Arthrobacter viscosus culture to remove diethylketone from aqueous solutions was evaluated. The effect of initial concentration of diethylketone on the growth of the bacteria was evaluated for the range of concentration between 0 and 4.8 g/l, aiming to evaluate a possible toxicological effect. Th...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-011-9488-7
更新日期:2012-02-01 00:00:00
abstract::Metal cyanides are significant contaminants of many soils found at the site of former industrial activity. In this study we isolated bacteria capable of degrading ferric ferrocyanide and K2Ni(CN)4. One of these bacteria a Rhodococcus spp. was subsequently used to bioaugment a minimal medium broth, spiked with K2Ni(CN)...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-005-4219-6
更新日期:2006-06-01 00:00:00
abstract::The ability of bacterial cultures to degrade diethanolamine under anoxic conditions with nitrate as an electron acceptor was investigated. A mixed culture capable of anaerobic degradation of diethanolamine was obtained from river sediments by enrichment culture. From this a single bacterial strain was isolated which c...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/BF00058178
更新日期:1996-06-01 00:00:00
abstract::This study aimed at characterizing a biosurfactant from Candida utilis, and use it in the preparation of salad dressings. The biosurfactant was produced in mineral medium supplemented with 6% glucose and 6% waste frying canola oil. The crude biosurfactant was then tested for stability in different conditions of pH, sa...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-019-09877-8
更新日期:2019-08-01 00:00:00
abstract::The degradation potential of trichloroethene by the aerobic methane- and ammonia-oxidizing microorganisms naturally associated with wetland plant (Carex comosa) roots was examined in this study. In bench-scale microcosm experiments with washed (soil free) Carex comosa roots, the activity of root-associated methane- an...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-010-9425-1
更新日期:2011-06-01 00:00:00
abstract::Fast development of ionic liquids as gaining more and more attention valuable chemicals will undoubtedly lead to environmental pollution. New formulations and application of ionic liquids may result in contamination in the presence of hydrophobic compounds, such as petroleum mixtures. We hypothesize that in the presen...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-009-9253-3
更新日期:2009-09-01 00:00:00
abstract::Bromophenol is listed as priority pollutant by U.S. EPA, however, there is no report so far on its removal in mixed pollutants system by any biological reactor operated in continuous mode. Furthermore, bromophenol along with chlorophenol and nitrophenol are usually the major constituents of paper pulp and pesticide in...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-014-9693-2
更新日期:2014-09-01 00:00:00
abstract::This paper presents results on anaerobic degradation of the azo dye blue HFRL in a bench scale Upflow anaerobic sludge blanket (UASB) reactor operated at ambient temperature. The results show that the addition of yeast extract (500 mg/L) increased color removal (P < 0.05) from 62 to 93% despite the low chemical oxygen...
journal_title:Biodegradation
pub_type: 杂志文章
doi:10.1007/s10532-011-9499-4
更新日期:2012-04-01 00:00:00