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Recombinant overexpression of dihydroneopterin aldolase catalyst potentially regulates folate‐biofortification
Author(s) -
Pandey Dhananjay K.,
Kumar Atul,
Rathore Jitendra S.,
Singh Nagendra,
Chaudhary Bhupendra
Publication year - 2017
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.201600721
Subject(s) - aldolase a , recombinant dna , biochemistry , heterologous , heterologous expression , biofortification , biology , transformation (genetics) , fructose bisphosphate aldolase , intracellular , agrobacterium , chemistry , enzyme , gene , organic chemistry , zinc
We aim to investigate the prospects of increased production of folate through the overexpression of heterologous dihydroneopterin aldolase catalyst. The gene encoding aldolase catalyst was cloned into an expression vector and the induced recombinant protein was purified through metal‐affinity chromatography which appeared at 14 kDa position on polyacrylamide‐gel. Remarkably, a periodic increase in the extracellular and intracellular folic acid concentration was observed at 4 h growth of induced recombinant DHNA samples than control in a pH‐dependent manner. Maximum folate concentration was observed with at least twofold increase in induced recombinant samples at pH8.0 compared to the significant decline at 6 h growth. Consistently, heterologous overexpression of bacterial aldolase through Agrobacterium ‐mediated genetic transformation of tobacco led to more than 2.5‐fold increase in the folate concentration in the transgenic leaves than control tissues. These data are veritable inspecting metabolic flux in both bacterial and plant systems, thus providing directions for future research on folate agri‐fortification.