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Article: Degradation of dimethyl isophthalate by Viarovorax paradoxus strain T4 isolated from deep-ocean sediment of the South China Sea

TitleDegradation of dimethyl isophthalate by Viarovorax paradoxus strain T4 isolated from deep-ocean sediment of the South China Sea
Authors
KeywordsBiochemical pathway
Dimethyl isophthalate
Esterase
Isophthalate
Monoisophthalate
Plasticiser
Issue Date2006
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/10807039.asp
Citation
Human And Ecological Risk Assessment, 2006, v. 12 n. 2, p. 236-247 How to Cite?
AbstractViarovorax paradoxus T4 strain was isolated from deep-ocean sediment and demonstrated to be able to degrade dimethyl isophthalate (DMI). When DMI was utilized as the sole source of carbon and energy, it was transformed by hydrolysis initially, forming monomethyl isophthalate (MMI) and isophthalate acid (IA) as degradation intermediates. DMI and MMI were completely transformed to MMI and IA in about 100 h, respectively. Degradation of IA was completed in about 55 h. Analysis of total organic carbon in the culture medium confirmed that more than 80% of the substrate carbon was mineralized. Bacterial esterase induced by a range of substrates could be assessed using p-nitrophenyl acetate as the common substrate using crude enzyme preparation. The decreasing trend of Km values derived from the Michaelis-Menten equation was dimethyl phthalate (DMP) > monomethyl phthalate (MMP) > dimethyl terephthalate (DMT) > Liver esterase > DMI > MMI > monomethyl terephthalate (MMT), indicating that higher Km values were obtained by di-esters than mono-ester and the esters induced by terephthalate esters showed the highest activity. This investigation suggests that biochemical pathways for phthalate esters share many common characteristics and the esterases induced by different substrates are highly specific. Copyright © Taylor & Francis Group, LLC.
Persistent Identifierhttp://hdl.handle.net/10722/73203
ISSN
2015 Impact Factor: 1.306
2015 SCImago Journal Rankings: 0.470
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, YPen_HK
dc.contributor.authorGu, JDen_HK
dc.date.accessioned2010-09-06T06:49:07Z-
dc.date.available2010-09-06T06:49:07Z-
dc.date.issued2006en_HK
dc.identifier.citationHuman And Ecological Risk Assessment, 2006, v. 12 n. 2, p. 236-247en_HK
dc.identifier.issn1080-7039en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73203-
dc.description.abstractViarovorax paradoxus T4 strain was isolated from deep-ocean sediment and demonstrated to be able to degrade dimethyl isophthalate (DMI). When DMI was utilized as the sole source of carbon and energy, it was transformed by hydrolysis initially, forming monomethyl isophthalate (MMI) and isophthalate acid (IA) as degradation intermediates. DMI and MMI were completely transformed to MMI and IA in about 100 h, respectively. Degradation of IA was completed in about 55 h. Analysis of total organic carbon in the culture medium confirmed that more than 80% of the substrate carbon was mineralized. Bacterial esterase induced by a range of substrates could be assessed using p-nitrophenyl acetate as the common substrate using crude enzyme preparation. The decreasing trend of Km values derived from the Michaelis-Menten equation was dimethyl phthalate (DMP) > monomethyl phthalate (MMP) > dimethyl terephthalate (DMT) > Liver esterase > DMI > MMI > monomethyl terephthalate (MMT), indicating that higher Km values were obtained by di-esters than mono-ester and the esters induced by terephthalate esters showed the highest activity. This investigation suggests that biochemical pathways for phthalate esters share many common characteristics and the esterases induced by different substrates are highly specific. Copyright © Taylor & Francis Group, LLC.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/10807039.aspen_HK
dc.relation.ispartofHuman and Ecological Risk Assessmenten_HK
dc.subjectBiochemical pathwayen_HK
dc.subjectDimethyl isophthalateen_HK
dc.subjectEsteraseen_HK
dc.subjectIsophthalateen_HK
dc.subjectMonoisophthalateen_HK
dc.subjectPlasticiseren_HK
dc.titleDegradation of dimethyl isophthalate by Viarovorax paradoxus strain T4 isolated from deep-ocean sediment of the South China Seaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1080-7039&volume=12&spage=236&epage=247&date=2006&atitle=Degradation+of+dimethyl+isophthalate+by+Viarovorax+paradoxus+strain+T4+isolated+from+deep-ocean+sediment+of+the+South+China+Seaen_HK
dc.identifier.emailGu, JD: jdgu@hkucc.hku.hken_HK
dc.identifier.authorityGu, JD=rp00701en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/10807030500531521en_HK
dc.identifier.scopuseid_2-s2.0-33645107576en_HK
dc.identifier.hkuros116772en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33645107576&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume12en_HK
dc.identifier.issue2en_HK
dc.identifier.spage236en_HK
dc.identifier.epage247en_HK
dc.identifier.isiWOS:000237022500004-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridWang, YP=9736272200en_HK
dc.identifier.scopusauthoridGu, JD=7403129601en_HK
dc.identifier.citeulike554661-

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