Organophosphate hydrolase interacts with Ton components and is targeted to the membrane only in the presence of the ExbB/ExbD complex

FEBS Letters

article

Ramurthy Gudla¹  Guruprasad Varma Konduru²  Hampapathalu Adimurty Nagarajaram³  Dayananda Siddavattam¹ 

[1] Department of Animal Biology, School of Life Sciences, University of Hyderabad;Centre for DNA Fingerprinting and Diagnostics;Department of Systems and Computational Biology, School of Life Sciences, University of Hyderabad

关键词: ExbB/ExbD;    iron transport;    OPH;    Ton complex;    TonBDT;   

DOI  :  10.1002/1873-3468.13345

来源: John Wiley & Sons Ltd.

【 摘 要 】

Our study aims to investigate the physiological role of organophosphate hydrolase (OPH), hitherto known for its involvement in the degradation of organophosphate insecticides and nerve agents in Sphingobium fuliginis. We find that OPH exists as part of the TonB-dependent Transport system that is involved in nutrient transport across the bacterial outer membrane. OPH interacts physically with the Ton complex components ExbD and TonB. The surface-exposed arginine residues (R91 and R96) of OPH facilitate its interaction with ExbD. OPH is targeted to the inner membrane of Escherichia coli only when it is co-expressed with either ExbD or the ExbB/ ExbD complex. In the absence of ExbD, OPH remains in the cytoplasm. Our findings suggest a role for OPH in outer membrane transport.

【 授权许可】

Unknown