Corrigendum to “Interaction between gallotannin and a recombinant form of arginine kinase of Trypanosoma brucei (TbAK): Thermodynamic and spectrofluorimetric evaluation”
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Date
2014
Journal Title
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ublished by Hindawi Publishing Corporation in Journal of Biophysics
Abstract
Current chemotherapies against trypanosomiasis are beset with diverse challenges, a situation which underscores the numerous research efforts aimed at finding newer and effective treatments. Arginine kinase of trypanosome has been validated as target for drug development against trypanosomiasis. The present study investigated the interaction between a recombinant form of the arginine kinase (rTbAK) of trypanosome and gallotannin. The interaction between gallotannin and recombinant arginine kinase of Trypanosoma brucei caused significant decrease of enzyme activity. Kinetic analysis revealed the interaction to be of noncompetitive inhibition. Further thermodynamic analysis showed that the interaction between gallotannin and the recombinant arginine kinase was nonspontaneous and involved hydrophobic forces. The 𝐾sv values and the FRET analysis suggest that static quenching of fluorescence intensity by gallotannin was static.Data revealed inhibitory interactions between gallotannin and rTbAK of trypanosome. Although themechanism of inhibition is not clear yet, molecular docking studies are ongoing to clearly define the inhibitory interactions between the gallotannin and rTbAK.The knowledge of such binding properties would enrich development of selective inhibitors for the arginine kinase of Trypanosoma brucei.
Description
Data revealed inhibitory interactions between gallotannin and rTbAK. To our knowledge, this is the first report demonstrating the inhibitory potentials of gallotannin on the activity of rTbAK. The inhibitory relationships were consistent with noncompetitive interactions. Furthermore, the Stern-Volmer plots indicated that interactions involving the gallotannin, which caused the quenching of fluorescence intensity of the rTbAK,may be static.This is supported by the FRET analysis which also implicates the high probability for fluorescence exchange between rTBAK and gallotannin. Although the mechanism of inhibition is not clear yet, evidence presented
warrants further kinetic analysis including molecular docking in order to clearly define the inhibitory interactions
between the gallotannin and rTbAK.Theinsights of the binding properties have become necessary if selective inhibition of TbAK and eventual better trypanocides are desirable.
Keywords
Gallotannin, Arginine Kinase, Trypanosoma brucei, Spectrofluorimetric Evaluation
Citation
Adeyemi Oluyomi Stephen, Sulaiman Adenike Faoziyat & Iniaghe Martin Onome (2018): Corrigendum to “Interaction between gallotannin and a recombinant form of arginine kinase of Trypanosoma brucei (TbAK): Thermodynamic and spectrofluorimetric evaluation”. Published by Hindawi Publishing Corporation in Journal of Biophysics, Article ID 1914746, Volume 2018: 1-7. Available online at https://www.hindawi.com/journals/jbp/2018/1914746/; http://dx.doi.org/10.1155/2014/675905;