Binding of Hg2+ with Phytochelatins: Study by Differential Pulse Voltammetry on Rotating Au-Disk Electrode, Electrospray Ionization Mass-Spectrometry, and Isothermal Titration Calorimetry
The binding of Hg2+ with synthetic phytochelatins ((γ-Glu-Cys) n -Gly, PC n , n = 2, 3, 4) was investigated by a recently proposed electroanalytical method, using differential pulse voltammetry on the rotating Au-disk electrode, Electrospray ionization mass-spectrometry (ESI-MS) and isothermal titra...
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| Veröffentlicht in: | Environmental science & technology 2009-09, Vol.43 (18), p.7010-7015 |
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| creator | Chekmeneva, Elena Díaz-Cruz, José Manuel Ariño, Cristina Esteban, Miquel |
| description | The binding of Hg2+ with synthetic phytochelatins ((γ-Glu-Cys) n -Gly, PC n , n = 2, 3, 4) was investigated by a recently proposed electroanalytical method, using differential pulse voltammetry on the rotating Au-disk electrode, Electrospray ionization mass-spectrometry (ESI-MS) and isothermal titration calorimetry (ITC). ESI-MS experiments provided the exact stoichiometries of the complexes formed at different PC n /Hg2+ ratios. Voltammetry provided more detailed information on the complexation processes through the use of multivariate curve resolution by alternating least squares of the data matrix obtained from titrations with fine increments of metal or ligand. The system Hg2+-GSH-PC2 was investigated by voltammetry in order to obtain an estimation of the Hg2+ behavior in the presence of two related ligands. The additional assessment of the stability of Hg2+-PC n complexes was achieved through ITC by using the therapeutic chelator sodium 2,3-dimercaptopropanesulfate (DMPS) over Hg2+-PC n systems. The stability of various Hg2+-PC n complexes and the ability of DMPS to replace PC n from these complexes were examined. |
| doi_str_mv | 10.1021/es901325f |
| format | Article |
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ESI-MS experiments provided the exact stoichiometries of the complexes formed at different PC n /Hg2+ ratios. Voltammetry provided more detailed information on the complexation processes through the use of multivariate curve resolution by alternating least squares of the data matrix obtained from titrations with fine increments of metal or ligand. The system Hg2+-GSH-PC2 was investigated by voltammetry in order to obtain an estimation of the Hg2+ behavior in the presence of two related ligands. The additional assessment of the stability of Hg2+-PC n complexes was achieved through ITC by using the therapeutic chelator sodium 2,3-dimercaptopropanesulfate (DMPS) over Hg2+-PC n systems. The stability of various Hg2+-PC n complexes and the ability of DMPS to replace PC n from these complexes were examined.</description><identifier>ISSN: 0013-936X</identifier><identifier>EISSN: 1520-5851</identifier><identifier>DOI: 10.1021/es901325f</identifier><identifier>PMID: 19806735</identifier><identifier>CODEN: ESTHAG</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Biodegradation, Environmental ; Calorimetry - methods ; Electrochemistry - methods ; Electrodes ; Environmental Processes ; Exact sciences and technology ; Gold - chemistry ; Mercury - metabolism ; Phytochelatins - metabolism ; Pollution ; Rotation ; Spectrometry, Mass, Electrospray Ionization</subject><ispartof>Environmental science & technology, 2009-09, Vol.43 (18), p.7010-7015</ispartof><rights>Copyright © 2009 American Chemical Society</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/es901325f$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/es901325f$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,27055,27903,27904,56716,56766</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22070288$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19806735$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Chekmeneva, Elena</creatorcontrib><creatorcontrib>Díaz-Cruz, José Manuel</creatorcontrib><creatorcontrib>Ariño, Cristina</creatorcontrib><creatorcontrib>Esteban, Miquel</creatorcontrib><title>Binding of Hg2+ with Phytochelatins: Study by Differential Pulse Voltammetry on Rotating Au-Disk Electrode, Electrospray Ionization Mass-Spectrometry, and Isothermal Titration Calorimetry</title><title>Environmental science & technology</title><addtitle>Environ. Sci. Technol</addtitle><description>The binding of Hg2+ with synthetic phytochelatins ((γ-Glu-Cys) n -Gly, PC n , n = 2, 3, 4) was investigated by a recently proposed electroanalytical method, using differential pulse voltammetry on the rotating Au-disk electrode, Electrospray ionization mass-spectrometry (ESI-MS) and isothermal titration calorimetry (ITC). ESI-MS experiments provided the exact stoichiometries of the complexes formed at different PC n /Hg2+ ratios. Voltammetry provided more detailed information on the complexation processes through the use of multivariate curve resolution by alternating least squares of the data matrix obtained from titrations with fine increments of metal or ligand. The system Hg2+-GSH-PC2 was investigated by voltammetry in order to obtain an estimation of the Hg2+ behavior in the presence of two related ligands. The additional assessment of the stability of Hg2+-PC n complexes was achieved through ITC by using the therapeutic chelator sodium 2,3-dimercaptopropanesulfate (DMPS) over Hg2+-PC n systems. The stability of various Hg2+-PC n complexes and the ability of DMPS to replace PC n from these complexes were examined.</description><subject>Applied sciences</subject><subject>Biodegradation, Environmental</subject><subject>Calorimetry - methods</subject><subject>Electrochemistry - methods</subject><subject>Electrodes</subject><subject>Environmental Processes</subject><subject>Exact sciences and technology</subject><subject>Gold - chemistry</subject><subject>Mercury - metabolism</subject><subject>Phytochelatins - metabolism</subject><subject>Pollution</subject><subject>Rotation</subject><subject>Spectrometry, Mass, Electrospray Ionization</subject><issn>0013-936X</issn><issn>1520-5851</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkc1u1DAQxy0EotuFAy-AfEEcaMAfSdbprWwLXamIihbELZrE9q6LYy-2oyq8Gi-Hu92W04xmfvP1H4ReUfKeEkY_qNgQylmln6AZrRgpKlHRp2hGcrRoeP3zAB3GeEMIYZyI5-iANoLUC17N0N-Pxknj1thrfL5m7_CtSRt8uZmS7zfKQjIuHuOrNMoJdxM-NVqroFwyYPHlaKPCP7xNMAwqhQl7h7_5dFe0xidjcWriL3xmVZ-Cl-rowY3bABNeeWf-ZDTXfIEYi6vtLrlrdITBSbyKPm1UGPKoa5PCPbsE64PZUS_QMw15hZd7O0ffP51dL8-Li6-fV8uTiwIYp6kQumELXcq6FgR4WUJHqlJy0hBFa8G6Una1KnvgkLWUumd1RTtZ6i7rBZpqPkdv7_tug_89qpjawcReWQtO-TG2DRWkpIss6By93pNjNyjZbvOmEKb2Qe8MvNkDEHuwOoDrTXzkGCMLwoT4z0Ef2xs_BpcPbClp7_7dPv6b_wO-dp3g</recordid><startdate>20090915</startdate><enddate>20090915</enddate><creator>Chekmeneva, Elena</creator><creator>Díaz-Cruz, José Manuel</creator><creator>Ariño, Cristina</creator><creator>Esteban, Miquel</creator><general>American Chemical Society</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope></search><sort><creationdate>20090915</creationdate><title>Binding of Hg2+ with Phytochelatins: Study by Differential Pulse Voltammetry on Rotating Au-Disk Electrode, Electrospray Ionization Mass-Spectrometry, and Isothermal Titration Calorimetry</title><author>Chekmeneva, Elena ; Díaz-Cruz, José Manuel ; Ariño, Cristina ; Esteban, Miquel</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a231t-8f927f4d6680a344ab054d3090e1682b4db6e4ca3a021dfc2651bd4fb000af1f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Applied sciences</topic><topic>Biodegradation, Environmental</topic><topic>Calorimetry - methods</topic><topic>Electrochemistry - methods</topic><topic>Electrodes</topic><topic>Environmental Processes</topic><topic>Exact sciences and technology</topic><topic>Gold - chemistry</topic><topic>Mercury - metabolism</topic><topic>Phytochelatins - metabolism</topic><topic>Pollution</topic><topic>Rotation</topic><topic>Spectrometry, Mass, Electrospray Ionization</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chekmeneva, Elena</creatorcontrib><creatorcontrib>Díaz-Cruz, José Manuel</creatorcontrib><creatorcontrib>Ariño, Cristina</creatorcontrib><creatorcontrib>Esteban, Miquel</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><jtitle>Environmental science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chekmeneva, Elena</au><au>Díaz-Cruz, José Manuel</au><au>Ariño, Cristina</au><au>Esteban, Miquel</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Binding of Hg2+ with Phytochelatins: Study by Differential Pulse Voltammetry on Rotating Au-Disk Electrode, Electrospray Ionization Mass-Spectrometry, and Isothermal Titration Calorimetry</atitle><jtitle>Environmental science & technology</jtitle><addtitle>Environ. Sci. Technol</addtitle><date>2009-09-15</date><risdate>2009</risdate><volume>43</volume><issue>18</issue><spage>7010</spage><epage>7015</epage><pages>7010-7015</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>The binding of Hg2+ with synthetic phytochelatins ((γ-Glu-Cys) n -Gly, PC n , n = 2, 3, 4) was investigated by a recently proposed electroanalytical method, using differential pulse voltammetry on the rotating Au-disk electrode, Electrospray ionization mass-spectrometry (ESI-MS) and isothermal titration calorimetry (ITC). ESI-MS experiments provided the exact stoichiometries of the complexes formed at different PC n /Hg2+ ratios. Voltammetry provided more detailed information on the complexation processes through the use of multivariate curve resolution by alternating least squares of the data matrix obtained from titrations with fine increments of metal or ligand. The system Hg2+-GSH-PC2 was investigated by voltammetry in order to obtain an estimation of the Hg2+ behavior in the presence of two related ligands. The additional assessment of the stability of Hg2+-PC n complexes was achieved through ITC by using the therapeutic chelator sodium 2,3-dimercaptopropanesulfate (DMPS) over Hg2+-PC n systems. The stability of various Hg2+-PC n complexes and the ability of DMPS to replace PC n from these complexes were examined.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>19806735</pmid><doi>10.1021/es901325f</doi><tpages>6</tpages></addata></record> |
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| subjects | Applied sciences Biodegradation, Environmental Calorimetry - methods Electrochemistry - methods Electrodes Environmental Processes Exact sciences and technology Gold - chemistry Mercury - metabolism Phytochelatins - metabolism Pollution Rotation Spectrometry, Mass, Electrospray Ionization |
| title | Binding of Hg2+ with Phytochelatins: Study by Differential Pulse Voltammetry on Rotating Au-Disk Electrode, Electrospray Ionization Mass-Spectrometry, and Isothermal Titration Calorimetry |
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