Crystal structure of the ATP-binding subunit of an ABC transporter

Li-Wei Hung, Iris Xiaoyan Wang, Kishiko Nikaido, Pei-Qi Liu, Giovanna Ferro-Luzzi Ames and Sung-Hou Kim ()
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Li-Wei Hung: E. O. Lawrence Berkeley National Laboratory, University of California at Berkeley
Iris Xiaoyan Wang: University of California at Berkeley
Kishiko Nikaido: University of California at Berkeley
Pei-Qi Liu: University of California at Berkeley
Giovanna Ferro-Luzzi Ames: University of California at Berkeley
Sung-Hou Kim: E. O. Lawrence Berkeley National Laboratory, University of California at Berkeley

Nature, 1998, vol. 396, issue 6712, 703-707

Abstract: Abstract ABC transporters (also known as traffic ATPases) form a large family of proteins responsible for the translocation of a variety ofcompounds across membranes of both prokaryotes and eukaryotes1. The recently completed Escherichia coli genome sequence revealed that the largest family of paralogous E. coli proteins is composed of ABC transporters2. Many eukaryotic proteins of medical significance belong to this family, such as the cystic fibrosis transmembrane conductance regulator (CFTR), the P-glycoprotein (or multidrug-resistance protein) and the heterodimeric transporter associated with antigen processing (Tap1–Tap2). Here we report the crystal structure at 1.5 Å resolution of HisP, the ATP-binding subunit of the histidine permease, which is an ABC transporter from Salmonella typhimurium. We correlate the details of this structure with the biochemical, genetic and biophysical properties of the wild-type and several mutant HisP proteins. The structure provides a basis for understanding properties of ABC transporters and of defective CFTR proteins.

Date: 1998
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DOI: 10.1038/25393

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