A continuous spectrophotometric assay for Escherichia coli alanyl-transfer RNA synthetase

Roy, Siddhartha (1983) A continuous spectrophotometric assay for Escherichia coli alanyl-transfer RNA synthetase Analytical Biochemistry, 133 (2). pp. 292-295. ISSN 0003-2697

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0003-2697(83)90086-6

Abstract

A new continuous spectrophotometric assay is demonstrated for Escherichia coli alanyl-tRNA synthetase. It involves β-γ adenylyl imidophosphate as a substitute for ATP in the pyrophosphate exchange reaction. The net conversion of β-γ adenylyl imidophosphate to ATP can be linked to NADP reduction by hexokinase and glucose-6-P dehydrogenase catalyzed reactions, which can be monitored at 340 nm. This assay can be extended to other aminoacyl-tRNA synthetases which can use β-γ nonhydrolyzable analogs of ATP as an ATP substitute.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:tRNA Synthetase; Spectrophotometric; Continuous Assay; AMPPNP; Pyrophosphate Exchange
ID Code:43166
Deposited On:10 Jun 2011 07:11
Last Modified:10 Jun 2011 07:11

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