Maltose transport system of Escherichia coli: An ABC‐type transporter

FEBS Letters

Nikaido, Hiroshi¹ 

[1] Department of Molecular and Cell Biology, 229 Stanley Hall, University of California, Berkeley, CA 94720, USA

关键词: Maltodextrin;    ATPase;    Chemotaxis;    Binding protein;    Channel;    Active transport;   

DOI  :  10.1016/0014-5793(94)00315-7

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The maltose transport system of E. coli is composed of a periplasmic maltose-binding protein (MBP), the presumed transmembrane channel made up of MalF and MalG proteins, and two copies of the ATPase subunit, MalK. The membrane-associated transporter complex was purified in a functional form both from the wild-type strain and from mutants that do not require MBP for transport, and was reconstituted into proteoliposomes. A major function of MBP is to send a transmembrane signal, in the presence of ligands, to the ATPase subunits on the inner side of the membrane. In addition, MBP performs a special function in the translocation of the larger ligands, maltodextrins, perhaps by aligning them for entry into the channel.

【 授权许可】

Unknown