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The hydrolysis of 6-phosphogluconolactone in the second step of pentose phosphate pathway occurs via a two-water mechanism

Overview of attention for article published in Biophysical Chemistry, June 2018
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Title
The hydrolysis of 6-phosphogluconolactone in the second step of pentose phosphate pathway occurs via a two-water mechanism
Published in
Biophysical Chemistry, June 2018
DOI 10.1016/j.bpc.2018.06.002
Pubmed ID
Authors

Tabeer Fatima, Sadaf Rani, Stefan Fischer, Thomas Efferth, Farooq Ahmad Kiani

Abstract

Hydrolysis reaction marks the basis of life yet the mechanism of this crucial biochemical reaction is not completely understood. We recently reported the mechanisms of hydrolysis of nucleoside triphosphate and phosphate monoester. These two reactions hydrolyze P-O-P and P-O-C linkages, respectively. Here, we present the mechanism of hydrolysis of δ-6-phosphogluconolactone, which is an important precursor in the second step of the pentose phosphate pathway. Its hydrolysis requires the cleavage of C-O-C linkage and its mechanism is hitherto unknown. We report three mechanisms of hydrolysis of δ-6-phosphogluconolactone based on density functional computations. In the energetically most favorable mechanism, two water molecules participate in the hydrolysis reaction and the mechanism is sequential, i.e., activation of the attacking water molecule (OH bond breaking) precedes that of the cleavage of the CO bond of the C-O-C linkage. The rate-limiting energy barrier of this mechanism is comparable to the reported experimental free energy barrier. This mechanism has similarities with the mechanism of triphosphate hydrolysis and that of hydrolytic cleavage of DNA in EcoRV enzyme. This two-water sequential hydrolysis mechanism could be the unified mechanism required for the hydrolysis of other hydrolysable species in living cells.

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Mendeley readers

The data shown below were compiled from readership statistics for 9 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 9 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 3 33%
Researcher 2 22%
Professor > Associate Professor 1 11%
Student > Postgraduate 1 11%
Unknown 2 22%
Readers by discipline Count As %
Chemistry 2 22%
Veterinary Science and Veterinary Medicine 1 11%
Biochemistry, Genetics and Molecular Biology 1 11%
Unspecified 1 11%
Medicine and Dentistry 1 11%
Other 1 11%
Unknown 2 22%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 11 July 2018.
All research outputs
#22,767,715
of 25,382,440 outputs
Outputs from Biophysical Chemistry
#919
of 1,180 outputs
Outputs of similar age
#299,629
of 341,509 outputs
Outputs of similar age from Biophysical Chemistry
#11
of 22 outputs
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