Loading…
Monitoring protein–small molecule interactions by local pH modulation
We have developed a technique for sensing protein–small molecule and protein–ion interactions in bulk aqueous solution by utilizing a pH sensitive dye, 5-(and-6)-carboxyfluorescein, conjugated to free lysine residues on the surfaces of designated capture proteins. The fluorescein intensity was found...
Saved in:
Published in: | Biosensors & bioelectronics 2012-10, Vol.38 (1), p.74-78 |
---|---|
Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
cited_by | cdi_FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023 |
---|---|
cites | cdi_FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023 |
container_end_page | 78 |
container_issue | 1 |
container_start_page | 74 |
container_title | Biosensors & bioelectronics |
container_volume | 38 |
creator | Huang, Da Robison, Aaron D. Liu, Yiquan Cremer, Paul S. |
description | We have developed a technique for sensing protein–small molecule and protein–ion interactions in bulk aqueous solution by utilizing a pH sensitive dye, 5-(and-6)-carboxyfluorescein, conjugated to free lysine residues on the surfaces of designated capture proteins. The fluorescein intensity was found to change by about 6% and 15% for small molecule and ion binding, respectively. The assay works by modulating the local electric fields around a pH sensitive dye. This, in turn, alters the dye's apparent pKA value. Such changes may result directly from the charge on the analyte, occur through allosteric effects related to the binding process, or result from a combination of both. The assay was used to follow the binding of Ca2+ to calmodulin (CaM) and thiamine monophosphate (ThMP) to thiamine binding protein A (TbpA). The results demonstrate a binding constant of 1.1μM for the Ca2+/CaM pair and 3.2nM for ThMP/TbpA pair, which are in excellent agreement with literature values. These assays demonstrate the generality of this method for observing the interactions of small molecules and ions with capture proteins. In fact, the assay should work as a biosensor platform for most proteins containing a specific ligand binding site, which would be useful as a simple and rapid preliminary screen of protein–ligand interactions.
[Display omitted]
► pH modulation sensing detects the binding of small molecules and ions to proteins. ► The optical biosensor developed is a rapid method for screening ligand–receptor binding. ► The method developed is general and can be used with most proteins containing a binding site. |
doi_str_mv | 10.1016/j.bios.2012.05.023 |
format | article |
fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1031161469</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0956566312003181</els_id><sourcerecordid>1031161469</sourcerecordid><originalsourceid>FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023</originalsourceid><addsrcrecordid>eNp9kM9q3DAQh0Vp6G7SvkAPxZdCL3ZGkiXbkEsJ-QcbcknOQpbHRYtsbSW7kFveIW-YJ6nMbpJbTgPDNz9-8xHynUJBgcrTbdFaHwsGlBUgCmD8E1nTuuJ5ybj4TNbQCJkLKfmKHMe4BYCKNvCFrBirWCUYrMnVrR_t5IMd_2S74Ce048vTcxy0c9ngHZrZYWbHCYM2k_VjzNrHzHmjXba7TkQ3O73sv5KjXruI3w7zhDxcXtyfX-ebu6ub89-b3PBaTnlNoYaay6pmoutLlH1tGPJGmkpy0zEUaBpkCBKp7uuGi7JiQohe05a26cMT8mufm8r-nTFOarDRoHN6RD9HRYFTKmkpm4SyPWqCjzFgr3bBDjo8JkgtAtVWLQLVIlCBUCk-Hf045M_tgN3byauxBPw8ADomC33Qo7HxnZNMAK2Womd7DpONfxaDisbiaLCzAc2kOm8_6vEfRNCPIg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1031161469</pqid></control><display><type>article</type><title>Monitoring protein–small molecule interactions by local pH modulation</title><source>ScienceDirect Journals</source><creator>Huang, Da ; Robison, Aaron D. ; Liu, Yiquan ; Cremer, Paul S.</creator><creatorcontrib>Huang, Da ; Robison, Aaron D. ; Liu, Yiquan ; Cremer, Paul S.</creatorcontrib><description>We have developed a technique for sensing protein–small molecule and protein–ion interactions in bulk aqueous solution by utilizing a pH sensitive dye, 5-(and-6)-carboxyfluorescein, conjugated to free lysine residues on the surfaces of designated capture proteins. The fluorescein intensity was found to change by about 6% and 15% for small molecule and ion binding, respectively. The assay works by modulating the local electric fields around a pH sensitive dye. This, in turn, alters the dye's apparent pKA value. Such changes may result directly from the charge on the analyte, occur through allosteric effects related to the binding process, or result from a combination of both. The assay was used to follow the binding of Ca2+ to calmodulin (CaM) and thiamine monophosphate (ThMP) to thiamine binding protein A (TbpA). The results demonstrate a binding constant of 1.1μM for the Ca2+/CaM pair and 3.2nM for ThMP/TbpA pair, which are in excellent agreement with literature values. These assays demonstrate the generality of this method for observing the interactions of small molecules and ions with capture proteins. In fact, the assay should work as a biosensor platform for most proteins containing a specific ligand binding site, which would be useful as a simple and rapid preliminary screen of protein–ligand interactions.
[Display omitted]
► pH modulation sensing detects the binding of small molecules and ions to proteins. ► The optical biosensor developed is a rapid method for screening ligand–receptor binding. ► The method developed is general and can be used with most proteins containing a binding site.</description><identifier>ISSN: 0956-5663</identifier><identifier>EISSN: 1873-4235</identifier><identifier>DOI: 10.1016/j.bios.2012.05.023</identifier><identifier>PMID: 22727520</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Animals ; Binding Sites ; Biological and medical sciences ; Biosensing Techniques - methods ; Biosensor ; Biosensors ; Biotechnology ; Calcium - metabolism ; Calmodulin - metabolism ; Cattle ; Escherichia coli - metabolism ; Escherichia coli Proteins - metabolism ; Fluorescein ; Fluoresceins - chemistry ; Fluoresceins - metabolism ; Fluorescent Dyes - chemistry ; Fluorescent Dyes - metabolism ; Fundamental and applied biological sciences. Psychology ; Hydrogen-Ion Concentration ; Ions - metabolism ; Labeling ; Ligands ; Methods. Procedures. Technologies ; pH sensitive ; Protein ; Protein Binding ; Small molecule ; Spectrometry, Fluorescence - methods ; Thiamine - metabolism ; Titrimetry - methods ; Various methods and equipments</subject><ispartof>Biosensors & bioelectronics, 2012-10, Vol.38 (1), p.74-78</ispartof><rights>2012 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2012 Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023</citedby><cites>FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=26250172$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22727520$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Huang, Da</creatorcontrib><creatorcontrib>Robison, Aaron D.</creatorcontrib><creatorcontrib>Liu, Yiquan</creatorcontrib><creatorcontrib>Cremer, Paul S.</creatorcontrib><title>Monitoring protein–small molecule interactions by local pH modulation</title><title>Biosensors & bioelectronics</title><addtitle>Biosens Bioelectron</addtitle><description>We have developed a technique for sensing protein–small molecule and protein–ion interactions in bulk aqueous solution by utilizing a pH sensitive dye, 5-(and-6)-carboxyfluorescein, conjugated to free lysine residues on the surfaces of designated capture proteins. The fluorescein intensity was found to change by about 6% and 15% for small molecule and ion binding, respectively. The assay works by modulating the local electric fields around a pH sensitive dye. This, in turn, alters the dye's apparent pKA value. Such changes may result directly from the charge on the analyte, occur through allosteric effects related to the binding process, or result from a combination of both. The assay was used to follow the binding of Ca2+ to calmodulin (CaM) and thiamine monophosphate (ThMP) to thiamine binding protein A (TbpA). The results demonstrate a binding constant of 1.1μM for the Ca2+/CaM pair and 3.2nM for ThMP/TbpA pair, which are in excellent agreement with literature values. These assays demonstrate the generality of this method for observing the interactions of small molecules and ions with capture proteins. In fact, the assay should work as a biosensor platform for most proteins containing a specific ligand binding site, which would be useful as a simple and rapid preliminary screen of protein–ligand interactions.
[Display omitted]
► pH modulation sensing detects the binding of small molecules and ions to proteins. ► The optical biosensor developed is a rapid method for screening ligand–receptor binding. ► The method developed is general and can be used with most proteins containing a binding site.</description><subject>Animals</subject><subject>Binding Sites</subject><subject>Biological and medical sciences</subject><subject>Biosensing Techniques - methods</subject><subject>Biosensor</subject><subject>Biosensors</subject><subject>Biotechnology</subject><subject>Calcium - metabolism</subject><subject>Calmodulin - metabolism</subject><subject>Cattle</subject><subject>Escherichia coli - metabolism</subject><subject>Escherichia coli Proteins - metabolism</subject><subject>Fluorescein</subject><subject>Fluoresceins - chemistry</subject><subject>Fluoresceins - metabolism</subject><subject>Fluorescent Dyes - chemistry</subject><subject>Fluorescent Dyes - metabolism</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Hydrogen-Ion Concentration</subject><subject>Ions - metabolism</subject><subject>Labeling</subject><subject>Ligands</subject><subject>Methods. Procedures. Technologies</subject><subject>pH sensitive</subject><subject>Protein</subject><subject>Protein Binding</subject><subject>Small molecule</subject><subject>Spectrometry, Fluorescence - methods</subject><subject>Thiamine - metabolism</subject><subject>Titrimetry - methods</subject><subject>Various methods and equipments</subject><issn>0956-5663</issn><issn>1873-4235</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp9kM9q3DAQh0Vp6G7SvkAPxZdCL3ZGkiXbkEsJ-QcbcknOQpbHRYtsbSW7kFveIW-YJ6nMbpJbTgPDNz9-8xHynUJBgcrTbdFaHwsGlBUgCmD8E1nTuuJ5ybj4TNbQCJkLKfmKHMe4BYCKNvCFrBirWCUYrMnVrR_t5IMd_2S74Ce048vTcxy0c9ngHZrZYWbHCYM2k_VjzNrHzHmjXba7TkQ3O73sv5KjXruI3w7zhDxcXtyfX-ebu6ub89-b3PBaTnlNoYaay6pmoutLlH1tGPJGmkpy0zEUaBpkCBKp7uuGi7JiQohe05a26cMT8mufm8r-nTFOarDRoHN6RD9HRYFTKmkpm4SyPWqCjzFgr3bBDjo8JkgtAtVWLQLVIlCBUCk-Hf045M_tgN3byauxBPw8ADomC33Qo7HxnZNMAK2Womd7DpONfxaDisbiaLCzAc2kOm8_6vEfRNCPIg</recordid><startdate>20121001</startdate><enddate>20121001</enddate><creator>Huang, Da</creator><creator>Robison, Aaron D.</creator><creator>Liu, Yiquan</creator><creator>Cremer, Paul S.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>20121001</creationdate><title>Monitoring protein–small molecule interactions by local pH modulation</title><author>Huang, Da ; Robison, Aaron D. ; Liu, Yiquan ; Cremer, Paul S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Animals</topic><topic>Binding Sites</topic><topic>Biological and medical sciences</topic><topic>Biosensing Techniques - methods</topic><topic>Biosensor</topic><topic>Biosensors</topic><topic>Biotechnology</topic><topic>Calcium - metabolism</topic><topic>Calmodulin - metabolism</topic><topic>Cattle</topic><topic>Escherichia coli - metabolism</topic><topic>Escherichia coli Proteins - metabolism</topic><topic>Fluorescein</topic><topic>Fluoresceins - chemistry</topic><topic>Fluoresceins - metabolism</topic><topic>Fluorescent Dyes - chemistry</topic><topic>Fluorescent Dyes - metabolism</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Hydrogen-Ion Concentration</topic><topic>Ions - metabolism</topic><topic>Labeling</topic><topic>Ligands</topic><topic>Methods. Procedures. Technologies</topic><topic>pH sensitive</topic><topic>Protein</topic><topic>Protein Binding</topic><topic>Small molecule</topic><topic>Spectrometry, Fluorescence - methods</topic><topic>Thiamine - metabolism</topic><topic>Titrimetry - methods</topic><topic>Various methods and equipments</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huang, Da</creatorcontrib><creatorcontrib>Robison, Aaron D.</creatorcontrib><creatorcontrib>Liu, Yiquan</creatorcontrib><creatorcontrib>Cremer, Paul S.</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>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Biosensors & bioelectronics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huang, Da</au><au>Robison, Aaron D.</au><au>Liu, Yiquan</au><au>Cremer, Paul S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Monitoring protein–small molecule interactions by local pH modulation</atitle><jtitle>Biosensors & bioelectronics</jtitle><addtitle>Biosens Bioelectron</addtitle><date>2012-10-01</date><risdate>2012</risdate><volume>38</volume><issue>1</issue><spage>74</spage><epage>78</epage><pages>74-78</pages><issn>0956-5663</issn><eissn>1873-4235</eissn><abstract>We have developed a technique for sensing protein–small molecule and protein–ion interactions in bulk aqueous solution by utilizing a pH sensitive dye, 5-(and-6)-carboxyfluorescein, conjugated to free lysine residues on the surfaces of designated capture proteins. The fluorescein intensity was found to change by about 6% and 15% for small molecule and ion binding, respectively. The assay works by modulating the local electric fields around a pH sensitive dye. This, in turn, alters the dye's apparent pKA value. Such changes may result directly from the charge on the analyte, occur through allosteric effects related to the binding process, or result from a combination of both. The assay was used to follow the binding of Ca2+ to calmodulin (CaM) and thiamine monophosphate (ThMP) to thiamine binding protein A (TbpA). The results demonstrate a binding constant of 1.1μM for the Ca2+/CaM pair and 3.2nM for ThMP/TbpA pair, which are in excellent agreement with literature values. These assays demonstrate the generality of this method for observing the interactions of small molecules and ions with capture proteins. In fact, the assay should work as a biosensor platform for most proteins containing a specific ligand binding site, which would be useful as a simple and rapid preliminary screen of protein–ligand interactions.
[Display omitted]
► pH modulation sensing detects the binding of small molecules and ions to proteins. ► The optical biosensor developed is a rapid method for screening ligand–receptor binding. ► The method developed is general and can be used with most proteins containing a binding site.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><pmid>22727520</pmid><doi>10.1016/j.bios.2012.05.023</doi><tpages>5</tpages></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0956-5663 |
ispartof | Biosensors & bioelectronics, 2012-10, Vol.38 (1), p.74-78 |
issn | 0956-5663 1873-4235 |
language | eng |
recordid | cdi_proquest_miscellaneous_1031161469 |
source | ScienceDirect Journals |
subjects | Animals Binding Sites Biological and medical sciences Biosensing Techniques - methods Biosensor Biosensors Biotechnology Calcium - metabolism Calmodulin - metabolism Cattle Escherichia coli - metabolism Escherichia coli Proteins - metabolism Fluorescein Fluoresceins - chemistry Fluoresceins - metabolism Fluorescent Dyes - chemistry Fluorescent Dyes - metabolism Fundamental and applied biological sciences. Psychology Hydrogen-Ion Concentration Ions - metabolism Labeling Ligands Methods. Procedures. Technologies pH sensitive Protein Protein Binding Small molecule Spectrometry, Fluorescence - methods Thiamine - metabolism Titrimetry - methods Various methods and equipments |
title | Monitoring protein–small molecule interactions by local pH modulation |
url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-23T03%3A19%3A00IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Monitoring%20protein%E2%80%93small%20molecule%20interactions%20by%20local%20pH%20modulation&rft.jtitle=Biosensors%20&%20bioelectronics&rft.au=Huang,%20Da&rft.date=2012-10-01&rft.volume=38&rft.issue=1&rft.spage=74&rft.epage=78&rft.pages=74-78&rft.issn=0956-5663&rft.eissn=1873-4235&rft_id=info:doi/10.1016/j.bios.2012.05.023&rft_dat=%3Cproquest_cross%3E1031161469%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c386t-810808367825df4e6f8c2e396c763cd2e5ec9e2e06e1af8935472555fa1b1b023%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1031161469&rft_id=info:pmid/22727520&rfr_iscdi=true |