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J. Bacteriol., 03 1995, 1638-1640, Vol 177, No. 6
Copyright © 1995, American Society for Microbiology

Distribution of the CorA Mg2+ transport system in gram-negative bacteria

RL Smith and ME Maguire
Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106-4965.

The CorA Mg2+ transport system is the dominant constitutive uptake mechanism in Salmonella typhimurium and Escherichia coli. Southern blot hybridization and PCR techniques were used to screen a panel of 18 additional gram-negative bacterial species for corA homologs. Virtually all strains tested positive for the presence of corA. Thus, corA appears to be ubiquitous within gram-negative bacteria and is likely their major Mg2+ influx system.

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