Role of IncP-1β plasmids pWDL7
Broad-host-range catabolic plasmids play an important role in bacterial degradation of man-made compounds. To gain insight into the role of these plasmids in chloroaniline degradation, we determined the first complete nucleotide sequences of an IncP-1 chloroaniline degradation plasmid, pWDL7::rfp an...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/101291 http://hdl.handle.net/10220/10996 |
| _version_ | 1811692509051486208 |
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| author | Król, J. E. Penrod, J. T. McCaslin, H. Rogers, L. M. Yano, H. Stancik, A. D. Dejonghe, W. Brown, C. J. Parales, R. E. Wuertz, Stefan. Top, E. M. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Król, J. E. Penrod, J. T. McCaslin, H. Rogers, L. M. Yano, H. Stancik, A. D. Dejonghe, W. Brown, C. J. Parales, R. E. Wuertz, Stefan. Top, E. M. |
| author_sort | Król, J. E. |
| collection | NTU |
| description | Broad-host-range catabolic plasmids play an important role in bacterial degradation of man-made compounds. To gain insight into the role of these plasmids in chloroaniline degradation, we determined the first complete nucleotide sequences of an IncP-1 chloroaniline degradation plasmid, pWDL7::rfp and its close relative pNB8c, as well as the expression pattern, function, and bioaugmentation potential of the putative 3-chloroaniline (3-CA) oxidation genes. Based on phylogenetic analysis of backbone proteins, both plasmids are members of a distinct clade within the IncP-1β subgroup. The plasmids are almost identical, but whereas pWDL7::rfp carries a duplicate inverted catabolic transposon, Tn6063, containing a putative 3-CA oxidation gene cluster, dcaQTA1A2BR, pNB8c contains only a single copy of the transposon. No genes for an aromatic ring cleavage pathway were detected on either plasmid, suggesting that only the upper 3-CA degradation pathway was present. The dcaA1A2B gene products expressed from a high-copy-number vector were shown to convert 3-CA to 4-chlorocatechol in Escherichia coli. Slight differences in the dca promoter region between the plasmids and lack of induction of transcription of the pNB8c dca genes by 3-CA may explain previous findings that pNB8C does not confer 3-CA transformation. Bioaugmentation of activated sludge with pWDL7::rfp accelerated removal of 3-CA, but only in the presence of an additional carbon source. Successful bioaugmentation requires complementation of the upper pathway genes with chlorocatechol cleavage genes in indigenous bacteria. The genome sequences of these plasmids thus help explain the molecular basis of their catabolic activities. |
| first_indexed | 2024-10-01T06:36:55Z |
| format | Journal Article |
| id | ntu-10356/101291 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:36:55Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1012912022-02-16T16:28:44Z Role of IncP-1β plasmids pWDL7 Król, J. E. Penrod, J. T. McCaslin, H. Rogers, L. M. Yano, H. Stancik, A. D. Dejonghe, W. Brown, C. J. Parales, R. E. Wuertz, Stefan. Top, E. M. School of Civil and Environmental Engineering Broad-host-range catabolic plasmids play an important role in bacterial degradation of man-made compounds. To gain insight into the role of these plasmids in chloroaniline degradation, we determined the first complete nucleotide sequences of an IncP-1 chloroaniline degradation plasmid, pWDL7::rfp and its close relative pNB8c, as well as the expression pattern, function, and bioaugmentation potential of the putative 3-chloroaniline (3-CA) oxidation genes. Based on phylogenetic analysis of backbone proteins, both plasmids are members of a distinct clade within the IncP-1β subgroup. The plasmids are almost identical, but whereas pWDL7::rfp carries a duplicate inverted catabolic transposon, Tn6063, containing a putative 3-CA oxidation gene cluster, dcaQTA1A2BR, pNB8c contains only a single copy of the transposon. No genes for an aromatic ring cleavage pathway were detected on either plasmid, suggesting that only the upper 3-CA degradation pathway was present. The dcaA1A2B gene products expressed from a high-copy-number vector were shown to convert 3-CA to 4-chlorocatechol in Escherichia coli. Slight differences in the dca promoter region between the plasmids and lack of induction of transcription of the pNB8c dca genes by 3-CA may explain previous findings that pNB8C does not confer 3-CA transformation. Bioaugmentation of activated sludge with pWDL7::rfp accelerated removal of 3-CA, but only in the presence of an additional carbon source. Successful bioaugmentation requires complementation of the upper pathway genes with chlorocatechol cleavage genes in indigenous bacteria. The genome sequences of these plasmids thus help explain the molecular basis of their catabolic activities. 2013-07-05T04:42:11Z 2019-12-06T20:36:10Z 2013-07-05T04:42:11Z 2019-12-06T20:36:10Z 2012 2012 Journal Article Król, J. E., Penrod, J. T., McCaslin, H., Rogers, L. M., Yano, H., Stancik, A. D., et al. (2012). Role of IncP-1β plasmids pWDL7::rfp and pNB8c in chloroaniline catabolism as determined by genomic and functional analyses. Applied and Environmental Microbiology, 78(3), 828-838. 0099-2240 https://hdl.handle.net/10356/101291 http://hdl.handle.net/10220/10996 10.1128/AEM.07480-11 22101050 en Applied and environmental microbiology © 2012 American Society for Microbiology. |
| spellingShingle | Król, J. E. Penrod, J. T. McCaslin, H. Rogers, L. M. Yano, H. Stancik, A. D. Dejonghe, W. Brown, C. J. Parales, R. E. Wuertz, Stefan. Top, E. M. Role of IncP-1β plasmids pWDL7 |
| title | Role of IncP-1β plasmids pWDL7 |
| title_full | Role of IncP-1β plasmids pWDL7 |
| title_fullStr | Role of IncP-1β plasmids pWDL7 |
| title_full_unstemmed | Role of IncP-1β plasmids pWDL7 |
| title_short | Role of IncP-1β plasmids pWDL7 |
| title_sort | role of incp 1β plasmids pwdl7 |
| url | https://hdl.handle.net/10356/101291 http://hdl.handle.net/10220/10996 |
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