Carbofuran degradation mediated by three related plasmid systems

Ogram, A.; Duan, Yong-Ping; Trabue, Steven; Feng, Xiuhong; Castro, Hector F.; Ou, Li‐Tse

doi:10.1111/j.1574-6941.2000.tb00712.x

Cited by 37 publications

(31 citation statements)

References 12 publications

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“…Several other genes encoding xenobiotic degradation have been found on plasmids in sphingomonads (10,124), and lin genes have been recovered from plasmids in UT26 (113), Spϩ (27), and B90A (86). At least some of the lin gene occurrences outside the sphingomonads are also associated with plasmids (173).…”

Section: Evolutionary Issues and Scope For Improvementmentioning

confidence: 96%

Biochemistry of Microbial Degradation of Hexachlorocyclohexane and Prospects for Bioremediation

Lal

Pandey

Sharma

et al. 2010

Microbiol Mol Biol Rev

352

338

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SUMMARY Lindane, the γ-isomer of hexachlorocyclohexane (HCH), is a potent insecticide. Purified lindane or unpurified mixtures of this and α-, β-, and δ-isomers of HCH were widely used as commercial insecticides in the last half of the 20th century. Large dumps of unused HCH isomers now constitute a major hazard because of their long residence times in soil and high nontarget toxicities. The major pathway for the aerobic degradation of HCH isomers in soil is the Lin pathway, and variants of this pathway will degrade all four of the HCH isomers although only slowly. Sequence differences in the primary LinA and LinB enzymes in the pathway play a key role in determining their ability to degrade the different isomers. LinA is a dehydrochlorinase, but little is known of its biochemistry. LinB is a hydrolytic dechlorinase that has been heterologously expressed and crystallized, and there is some understanding of the sequence-structure-function relationships underlying its substrate specificity and kinetics, although there are also some significant anomalies. The kinetics of some LinB variants are reported to be slow even for their preferred isomers. It is important to develop a better understanding of the biochemistries of the LinA and LinB variants and to use that knowledge to build better variants, because field trials of some bioremediation strategies based on the Lin pathway have yielded promising results but would not yet achieve economic levels of remediation.

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Section: Evolutionary Issues and Scope For Improvementmentioning

confidence: 96%

Biochemistry of Microbial Degradation of Hexachlorocyclohexane and Prospects for Bioremediation

Lal

Pandey

Sharma

et al. 2010

Microbiol Mol Biol Rev

352

338

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show abstract

“…In previous work, it was reported that plasmids are presumably involved in the degradation of naphthalene, biphenyl, toluene, and carbazole by sphingomonads (6,12,47,52). We have obtained evidence that in different sphingomonads the degradative pathways for naphthalenesulfonates, dibenzo-p-dioxin, and dibenzofuran are also encoded on plasmids.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, in S. aromaticivorans F199 and some other sphingomonads isolated from the same location, the genes encoding the degradative pathways for biphenyl, naphthalene, m-xylene, and p-cresol were detected on large plasmids (29,52). There is also some evidence that the genes for the degradation of carbazole by some other sphingomonads (e.g., Sphingomonas CF06) are also (at least in part) encoded on plasmids (12,47).…”

mentioning

confidence: 99%

Detection and Characterization of Conjugative Degradative Plasmids in Xenobiotic-Degrading Sphingomonas Strains

2004

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A systematic survey for the presence of plasmids in 17 different xenobiotic-degrading Sphingomonas strains was performed. In almost all analyzed strains, two to five plasmids with sizes of about 50 to 500 kb were detected by using pulsed-field gel electrophoresis. A comparison of plasmid preparations untreated or treated with S1 nuclease suggested that, in general, Sphingomonas plasmids are circular. Hybridization experiments with labeled gene probes suggested that large plasmids are involved in the degradation of dibenzo-p-dioxin, dibenzofuran, and naphthalenesulfonates in S. wittichii RW1, Sphingomonas sp. HH69, and S. xenophaga BN6, respectively. The plasmids which are responsible for the degradation of naphthalene, biphenyl, and toluene by S. aromaticivorans F199 (pNL1) and of naphthalenesulfonates by S. xenophaga BN6 (pBN6) were site-specifically labeled with a kanamycin resistance cassette. The conjugative transfer of these labeled plasmids was attempted with various bacterial strains as putative recipient strains. Thus, a conjugative transfer of plasmid pBN6 from S. xenophaga BN6 to a cured mutant of strain BN6 and to Sphingomonas sp. SS3 was observed. The conjugation experiments with plasmid pNL1 suggested a broader host range of this plasmid, because it was transferred without any obvious structural changes to S. yanoikuyae B1, Sphingomonas sp. SS3, and S. herbicidovorans. In contrast, major plasmid rearrangements were observed in the transconjugants after the transfer of plasmid pNL1 to Sphingomonas sp. HH69 and of pBN6 to Sphingomonas sp. SS3. No indications for the transfer of a Sphingomonas plasmid to bacteria outside of the Sphingomonadaceae were obtained.

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“…Also Pinyakong et al (2003a;2003b) observed that, many sphingomonads degrade naphthalene, anthracene, and phenanthalene by common pathways w e r e found in other gram-negative bacteria. In addition, many researchers (Kim et al, 1996;Feng et al, 1997;Romine et al, 1999;Ogram et al, 2000;Basta et al, 2004) found large plasmids in strains of Sphingomonas xenobiotic contributing to the degradation of PAH. (Mrozik et al, 2003).…”

Section: Degradation Study Of Pahmentioning

confidence: 99%

Estimation of Bacterial Biodegradability of PAH in Khor Al-Zubair Channel, Southern Iraq

Alkanany¹,

Gmais²,

Maki³

et al. 2017

ijms

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Four bacterial strains were isolated from Khor Al-Zubair channel, southern Iraq based on a high growth rate on crude oil and on hydrocarbon degradation ability. The strains were preliminarily identified based on morphological observation, and by the Vitek II system. The isolates were identified as Brevundimonas diminuta /vesicularis, Vibrio vulnificus, Sphingomonas paucimobilis and Ochrobactrum anthropic. However, the ability of these strains to utilize crude oil (0.25%; 0.5%; 1% and 2% v/v) varied both in rates of utilization and in growth profiles. The components of crude oil degraded by the isolates were determined by capillary gas chromatography. Sphingomonas paucimobilis and Vibrio vulnificus were the most effective bacteria degrade PAH on seventh day incubation, especially in concentration 2.0 mg/l (97.39% and 84.23%) respectively, meanwhile, Brevundimonas diminuta/ vesicularis was highly effective degrade PAH (73.41% a nd 62.08%) in concentration 1.0 and 0.5 mg/l, respectively. On the other hand, Ochrobactrum anthropi was the lowest in all concentrations.

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Carbofuran degradation mediated by three related plasmid systems

Cited by 37 publications

References 12 publications

Biochemistry of Microbial Degradation of Hexachlorocyclohexane and Prospects for Bioremediation

Biochemistry of Microbial Degradation of Hexachlorocyclohexane and Prospects for Bioremediation

Detection and Characterization of Conjugative Degradative Plasmids in Xenobiotic-Degrading Sphingomonas Strains

Estimation of Bacterial Biodegradability of PAH in Khor Al-Zubair Channel, Southern Iraq

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