The novel rice (Oryza sativa L.) gene OsSbf1 encodes a putative member of the Na+/bile acid symporter family.
PCR-based differential screening was used to identify ethylene-induced genes in deep-water rice (Oryza sativa L.). One of the isolated cDNAs represented a novel protein, OsSBF1, with high homology to mammalian Na+/bile acid transporters and to sodium-dependent transporters from bacteria. One highly homologous protein and three less conserved homologues were identified in Arabidopsis thaliana indicating that Sbf proteins exist in monocot and dicot plant species. Expression of OsSbf1 in deep-water rice was shown to be elevated by growth-inducing treatments. Since bile acids have not been found in plants to date a possible function of SBF proteins may be in the transport of structurally related sulphonated brassinosteroids.
Rzewuski
Guillaume
G
Institut für Allgemeine Botanik, Universität Hamburg, Ohnhorststrasse 18, D-22609 Hamburg, Germany.
Sauter
Margret
M
D000595:Amino Acid Sequence; D015152:Blotting, Northern; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D005875:Gibberellins / Q000494:pharmacology; D026901:Membrane Transport Proteins / Q000235:genetics*; D008969:Molecular Sequence Data; D009943:Organophosphorus Compounds / Q000494:pharmacology; D012275:Oryza / Q000235:genetics* / Q000254:growth & development; D010802:Phylogeny; D010937:Plant Growth Regulators / Q000494:pharmacology; D017386:Sequence Homology, Amino Acid
D005875:Gibberellins; D026901:Membrane Transport Proteins; D009943:Organophosphorus Compounds; D010937:Plant Growth Regulators; C005073:ethephon