Science. 1992 May 1;256(5057):663-5.

Cloning and expression in yeast of a plant potassium ion transport system.

Sentenac H, Bonneaud N, Minet M, Lacroute F, Salmon JM, Gaymard F, Grignon C.

Source

Biochimie et Physiologie Végétales, ENSA-M/INRA/CNRS URA 573, Montpellier, France.

Abstract

A membrane polypeptide involved in K+ transport in a higher plant was cloned by complementation of a yeast mutant defective in K+ uptake with a complementary DNA library from Arabidopsis thaliana. A 2.65-kilobase complementary DNA conferred ability to grow on media with K+ concentration in the micromolar range and to absorb K+ (or 86Rb+) at rates similar to those in wild-type yeast. The predicted amino acid sequence (838 amino acids) has three domains: a channel-forming region homologous to animal K+ channels, a cyclic nucleotide-binding site, and an ankyrin-like region.

PMID:: 1585180; [PubMed - indexed for MEDLINE]

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