The CorA transport system is the primary Mg2+ influx system of Salmonella typhimurium and Escherichia coli. CorA is virtually ubiquitous in the Bacteria and Archaea. There are also eukaryotic relatives of this protein. The family includes the MRS2 protein Swiss:Q01926 from yeast that is thought to be an RNA splicing protein [3]. However its membership of this family suggests that its effect on splicing is due to altered magnesium levels in the cell.

1: The CorA magnesium transporter gene family. Kehres DG, Lawyer CH, Maguire ME; Microb Comp Genomics 1998;3:151-169. PMID:9775386

2: The CorA Mg2+ transport protein of Salmonella typhimurium. Mutagenesis of conserved residues in the third membrane domain identifies a Mg2+ pore. Smith RL, Szegedy MA, Kucharski LM, Walker C, Wiet RM, Redpath A, Kaczmarek MT, Maguire ME; J Biol Chem 1998;273:28663-28669. PMID:9786860

3: The nuclear gene MRS2 is essential for the excision of group II introns from yeast mitochondrial transcripts in vivo. Wiesenberger G, Waldherr M, Schweyen RJ; J Biol Chem 1992;267:6963-6969. PMID:1551905