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Method for real-time detection of inorganic pyrophosphatase activity
KTH, Superseded Departments, Biochemistry and Biotechnology.
2001 (English)In: Analytical Biochemistry, ISSN 0003-2697, E-ISSN 1096-0309, Vol. 293, no 1, 67-70 p.Article in journal (Refereed) Published
Abstract [en]

A sensitive and simple method for real-time detection of inorganic pyrophosphatase (PPase) (EC 3.6.1.1) activity has been developed. The method is based on PPase-induced activation of the firefly luciferase activity in the presence of inorganic pyrophosphate (PPi). PPi inhibits the luciferase activity, but in the presence of PPase the luciferase activity is restored and the luminescence output increases. The assay yields linear responses between 8 and 500 mU. The detection limit was found to be 8 mU PPase. The method was used to detect the hydrolytic activity of PPases from Saccharomyces cerevisiae, Escherichia coli, and Bacillus stearothermophilus. As substrate for the luciferase, adenosine 5'-phosphosulfate can replace ATP, which is an advantage for detection of PPase activity in crude extracts containing ATP-hydrolyzing activities. The method can be used for kinetic and inhibition studies as well as for detection of PPase activity during different purification procedures.

Place, publisher, year, edition, pages
2001. Vol. 293, no 1, 67-70 p.
Keyword [en]
inorganic pyrophosphatase, inorganic pyrophosphate, inhibition, bioluminescence, luciferase, ATP, APS, luciferin, rat-liver, phosphate, purification, resolution, yeast
Identifiers
URN: urn:nbn:se:kth:diva-20708DOI: 10.1006/abio.2001.5106ISI: 000169238800010OAI: oai:DiVA.org:kth-20708DiVA: diva2:339404
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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