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Plasmodium falciparum , a malaria pathogen, has shown substantial resistance to treatment coupled with poor response to some vaccines thereby requiring urgent, holistic, and broad approach to prevent this endemic disease. Understanding the biology of the malaria parasite has been identified as a vital approach to overcome the threat of malaria. This study is aimed at identifying essential proteins unique to malaria parasites using a reconstructed  iPfa  genome-scale metabolic model (GEM) of the 3D7 strain of  Plasmodium falciparum  by filling gaps in the model with nineteen (19) metabolites and twenty-three (23) reactions obtained from the MetaCyc database. Twenty (20) currency metabolites were removed from the network because they have been identified to produce shortcuts that are biologically infeasible. The resulting modified  iPfa  GEM was a model using the  k -shortest path algorithm to identify possible alternative metabolic pathways in glycolysis and pentose phosphate pathways of  Plasmodium falciparum . Heuristic function was introduced for the optimal performance of the algorithm. To validate the prediction, the essentiality of the reactions in the reconstructed network was evaluated using betweenness centrality measure, which was applied to every reaction within the pathways considered in this study. Thirty-two (32) essential reactions were predicted among which our method validated fourteen (14) enzymes already predicted in the literature. The enzymatic proteins that catalyze these essential reactions were checked for homology with the host genome, and two (2) showed insignificant similarity, making them possible drug targets. In conclusion, the application of the intelligent search technique to the metabolic network of  P. falciparum  predicts potential biologically relevant alternative pathways using graph theory-based approach.

international journal of genomics

Computational Identification of Metabolic Pathways of<i>Plasmodium falciparum</i>using the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>k</mml:mi></mml:math>-Shortest Path Algorithm

Computational Identification of Metabolic Pathways ofPlasmodium falciparumusing thek-Shortest Path Algorithm