Journal of Bioenergetics and Biomembranes

, Volume 33, Issue 2, pp 79–92

Purification and Characterization of the Membrane-Bound Complex of an ABC Transporter, the Histidine Permease

  • Giovanna Ferro-Luzzi Ames
  • Kishiko Nikaido
  • Iris Xiaoyan Wang
  • Pei-Qi Liu
  • Cheng E. Liu
  • Calvin Hu
Article

DOI: 10.1023/A:1010797029183

Cite this article as:
Ames, G.FL., Nikaido, K., Wang, I.X. et al. J Bioenerg Biomembr (2001) 33: 79. doi:10.1023/A:1010797029183

Abstract

The bacterial histidine permease, an ABC transporter, from Salmonella typhimurium is composed of a membrane-bound complex, HisQMP2, comprising two hydrophobic subunits (HisQ and HisM), two copies of an ATP-hydrolyzing subunit, HisP, and a soluble receptor, HisJ. We describe the purification and characterization of HisQMP2 using a 6-histidines extension at the carboxy terminus of HisP [HisQMP2(his6)]. The purification is rapid and effective, giving a seven–fold purification with a yield of 85 and 98% purity. Two procedures are described differing in the detergent used (decanoylsucrose and octylglucoside, respectively) and in the presence of phospholipid. HisQMP2(his6) has ATPase and transport activities upon reconstitution into proteoliposomes (PLS). HisQMP2(his6) has a low level ATPase activity (intrinsic activity), which is stimulated to a different extent by the receptor—liganded and unliganded. Its pH optimum is 7.8–8.0, it requires a cation for activity and it displays cooperativity for ATP. The effect of various ATP analogs was analyzed. Determination of the molecular size of HisQMP2(his6) indicates that it is a monomer. The permeability properties of two kinds of reconstituted PLS preparations are described.

ABC transporterhistidine permeaseABC purification

Copyright information

© Plenum Publishing Corporation 2001

Authors and Affiliations

  • Giovanna Ferro-Luzzi Ames
  • Kishiko Nikaido
  • Iris Xiaoyan Wang
  • Pei-Qi Liu
  • Cheng E. Liu
  • Calvin Hu

There are no affiliations available