A membrane protein based biosensor: Use of a phosphate – H + symporter membrane protein (Pho84) in the sensing of phosphate ions

A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified...

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Veröffentlicht in:	Biosensors & bioelectronics Jg. 27; H. 1; S. 58 - 63
Hauptverfasser:	Basheer, Shabana, Samyn, Dieter, Hedström, Martin, Thakur, Munna Singh, Persson, Bengt L., Mattiasson, Bo
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	Kidlington Elsevier B.V 15.09.2011 Elsevier
Schlagworte:	Biochemistry Biokemi Biological and medical sciences Biosensing Techniques Biosensors Biotechnology capacitance Capacitive biosensor detection limit Electric Capacitance electrodes Engineering and Technology Fundamental and applied biological sciences. Psychology Immobilized Proteins - chemistry Industrial Biotechnology Industriell bioteknik ions Ions - analysis Membrane protein membrane proteins Membrane Proteins - chemistry Methods. Procedures. Technologies NATURAL SCIENCES NATURVETENSKAP Pho84 Phosphate phosphates Phosphates - analysis plasma membrane Proton-Phosphate Symporters - chemistry protons Saccharomyces Saccharomyces cerevisiae Saccharomyces cerevisiae Proteins - chemistry Symporter Teknik Various methods and equipments Capacitive biosensor Symporter Membrane protein Pho84 Phosphate Phosphates Biosensor Membrane Protein
ISSN:	0956-5663, 1873-4235, 1873-4235
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Abstract	A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K m . A linear increase in capacitance was monitored in the phosphate concentration range of 5–25 μM. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses.
AbstractList	A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K(m). A linear increase in capacitance was monitored in the phosphate concentration range of 5-25 μM. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses. A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo Kₘ. A linear increase in capacitance was monitored in the phosphate concentration range of 5–25μM. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses. A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K(m). A linear increase in capacitance was monitored in the phosphate concentration range of 5-25 mu M. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses. A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiaewas used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K(m). A linear increase in capacitance was monitored in the phosphate concentration range of 5-25 μM. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses.A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K(m). A linear increase in capacitance was monitored in the phosphate concentration range of 5-25 μM. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses. A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K m . A linear increase in capacitance was monitored in the phosphate concentration range of 5–25 μM. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses. A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84 plasma membrane phosphate/proton symporter of Saccharomyces cerevisiae was used as a sensing element. Heterologously expressed and purified Pho84 protein was immobilized on a self-assembled monolayer (SAM) on a capacitance electrode. Changes in capacitance were recorded upon exposure to phosphate compared to the control substance, phosphate analogue methylphosphonate. Hence, even without the explicit use of lipid membranes, the Pho84 membrane protein could retain its capacity of selective substrate binding, with a phosphate detection limit in the range of the apparent in vivo K(m). A linear increase in capacitance was monitored in the phosphate concentration range of 5-25Î¼M. The analytical response of the capacitive biosensor is in agreement with that the transporter undergoes significant conformational changes upon exposure to inorganic phosphate, while exposure to the analogue only causes minor responses.
Author	Thakur, Munna Singh Mattiasson, Bo Samyn, Dieter Persson, Bengt L. Basheer, Shabana Hedström, Martin
Author_xml	– sequence: 1 givenname: Shabana surname: Basheer fullname: Basheer, Shabana organization: Department of Biotechnology, Lund University, Box 124, 22100 Lund, Sweden – sequence: 2 givenname: Dieter surname: Samyn fullname: Samyn, Dieter organization: School of Natural Sciences, Linnaeus University, 39182 Kalmar, Sweden – sequence: 3 givenname: Martin surname: Hedström fullname: Hedström, Martin organization: Department of Biotechnology, Lund University, Box 124, 22100 Lund, Sweden – sequence: 4 givenname: Munna Singh surname: Thakur fullname: Thakur, Munna Singh organization: Department of Fermentation, Technology and Bioengineering, Central Food Technology Research Institute, Mysore 570013, India – sequence: 5 givenname: Bengt L. surname: Persson fullname: Persson, Bengt L. organization: School of Natural Sciences, Linnaeus University, 39182 Kalmar, Sweden – sequence: 6 givenname: Bo surname: Mattiasson fullname: Mattiasson, Bo email: Bo.Mattiasson@biotek.lu.se organization: Department of Biotechnology, Lund University, Box 124, 22100 Lund, Sweden
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Keywords	Capacitive biosensor Symporter Membrane protein Pho84 Phosphate Phosphates Biosensor Membrane Protein
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Snippet	A label free biosensor for direct detection of inorganic phosphate based on potential-step capacitance measurements has been developed. The high-affinity Pho84...
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SubjectTerms	Biochemistry Biokemi Biological and medical sciences Biosensing Techniques Biosensors Biotechnology capacitance Capacitive biosensor detection limit Electric Capacitance electrodes Engineering and Technology Fundamental and applied biological sciences. Psychology Immobilized Proteins - chemistry Industrial Biotechnology Industriell bioteknik ions Ions - analysis Membrane protein membrane proteins Membrane Proteins - chemistry Methods. Procedures. Technologies NATURAL SCIENCES NATURVETENSKAP Pho84 Phosphate phosphates Phosphates - analysis plasma membrane Proton-Phosphate Symporters - chemistry protons Saccharomyces Saccharomyces cerevisiae Saccharomyces cerevisiae Proteins - chemistry Symporter Teknik Various methods and equipments
Title	A membrane protein based biosensor: Use of a phosphate – H + symporter membrane protein (Pho84) in the sensing of phosphate ions
URI	https://dx.doi.org/10.1016/j.bios.2011.06.024 https://www.ncbi.nlm.nih.gov/pubmed/21782409 https://www.proquest.com/docview/1710219842 https://www.proquest.com/docview/881471533 https://www.proquest.com/docview/907173926 https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-16721 https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-112530
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