Snapshots of the maltose transporter during ATP hydrolysis.Oldham, M.L., Chen, J.
(2011) Proc Natl Acad Sci U S A 108: 15152-15156
- PubMed: 21825153
- DOI: https://doi.org/10.1073/pnas.1108858108
- Primary Citation of Related Structures:
3PUV, 3PUW, 3PUX, 3RLF
- PubMed Abstract:
ATP-binding cassette transporters are powered by ATP, but the mechanism by which these transporters hydrolyze ATP is unclear. In this study, four crystal structures of the full-length wild-type maltose transporter, stabilized by adenosine 5'-(β,γ-imido)triphosphate or ADP in conjunction with phosphate analogs BeF(3)(-), VO(4)(3-), or AIF(4)(-), were determined to 2.2- to 2.4-Å resolution. These structures led to the assignment of two enzymatic states during ATP hydrolysis and demonstrate specific functional roles of highly conserved residues in the nucleotide-binding domain, suggesting that ATP-binding cassette transporters catalyze ATP hydrolysis via a general base mechanism.
Department of Biological Sciences, Purdue University, Howard Hughes Medical Institute, 240 Martin Jischke Boulevard, West Lafayette, IN 47907, USA.