Table 2.

A list of few genetically engineered bacteria invloved in bioremediation.

Genetically engineered bacteria	Compound/heavy metal	Properties/application	References
Bacillus subtilis 168	Arsenic	Expressed the arsenite S-adenosylmethionine methyltransferase gene from thermophilic algae, Cyanidioschyzon merolae. This bacterium involved in arsenic methylation and volatilization	Huang et al., 2015
Rhodopseudomonas palustris	Mercury	Expressed mercury transport system and metallothionein for Hg2+ uptake	Deng and Jia, 2011
Escherichia coli	Nickel	Expressed nickel-affinity transmembrane protiens and metallothionein for Ni2+ bioaccumulation	Deng et al., 2013
Pseudomonas putida MC4-5222	1,2,3-Trichloropropane (TCP)	Expressed the haloalkane dehalogenase (DhaA31). More than 95% degradation of TCP was observed	Samin et al., 2014
Pseudomonas fluorescens	Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX)	Expressed the RDX-metabolizing enzyme XplA to degrade RDX in the rhizosphere	Lorenz et al., 2013
Pseudomonas putida KTUe	Organophosphates, pyrethroids, and carbamates	A scarless genome editing strategy was used to insert four pesticide degrading genes, vgb, and gfp. This bacterium completely degraded methyl parathion, chlorpyrifos, fenpropathrin, cypermethrin, carbofuran and carbaryl when concentration was 50 mg/L	Gong et al., 2018
Cupriavidus necator JMP134-ONP	Nitrophenols	Inserted ortho-nitrophenol degradation operon (onpABC gene cluster). This bacterium was able to degrade two isomers of nitrophenols	Hu et al., 2014