Repellent taxis in response to nickel ion requires neither Ni2+ transport nor the periplasmic NikA binding protein.
Ni(2+) and Co(2+) are sensed as repellents by the Escherichia coli Tar chemoreceptor. The periplasmic Ni(2+) binding protein, NikA, has been suggested to sense Ni(2+). We show here that neither NikA nor the membrane-bound NikB and NikC proteins of the Ni(2+) transport system are required for repellent taxis in response to Ni(2+).
Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
Derek L
DL
Englert
Christopher A
CA
Adase
Arul
A
Jayaraman
Michael D
MD
Manson
D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000378:metabolism; D001692:Biological Transport / Q000235:genetics / Q000502:physiology*; D002151:Calorimetry; D002633:Chemotaxis / Q000235:genetics / Q000502:physiology*; D004926:Escherichia coli / Q000378:metabolism / Q000502:physiology*; D029968:Escherichia coli Proteins / Q000235:genetics / Q000378:metabolism; D009532:Nickel / Q000378:metabolism*
D018528:ATP-Binding Cassette Transporters; D029968:Escherichia coli Proteins; C089849:nikA protein, E coli; C029938:nickel sulfate; D009532:Nickel