The Osmotically Regulated proU Locus of Salmonella typhimurium Encodes a Periplasmic Betaine-binding Protein
- 1 February 1987
- journal article
- research article
- Published by Microbiology Society in Microbiology
- Vol. 133 (2) , 305-310
- https://doi.org/10.1099/00221287-133-2-305
Abstract
The proU locus of Salmonella typhimurium encodes an osmotically induced betaine transport system. We have identified a 31 kDa periplasmic protein, encoded by proU, whose synthesis is induced by osmotic stress. A specific betaine-binding activity with a KD of about 1 .mu.M is also present in the periplasm of osmotically induced cells. This activity is absent in those proU mutants which lack the 31 kDa periplasmic protein. Thus, ProU is a periplasmic binding-protein-dependent transport system.This publication has 11 references indexed in Scilit:
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