Table 2.

Comparison of GldA to various ABC transporters

Protein	Organism	Similarity score	% amino acid identity with GldA	Function	Ref.
Sll0489	Synechocystis PCC6803	694	50% identity over 222 residues	Unknown	26
BcrA	Bacillus licheniformis	554	32.9% identity over 295 residues	Resistance to the peptide antibiotic bacitracin	27
MtrA	Streptomyces argillaceus	496	34.2% identity over 260 residues	Resistance to the polyketide antibiotic mithramycin	28
NosF	Rhizobium meliloti	478	38.4% identity over 216 residues	Cu processing/transport (for nitrous oxide reduction)	29
NodI	Bradyrhizobium japonicum	475	34.8% identity over 221 residues	Oligosaccharide export (involved in nodulation)	30
NisF	Lactococcus lactis	474	37% identity over 219 residues	Resistance to peptide antibiotic nisin	31
EpiF	Staphylococcus epidermidis	422	34.6% identity over 205 residues	Resistance to the peptide antibiotic epidermin	32
CysA	Synechococcus PCC7942	412	33.5% identity over 212 residues	Uptake of sulfate	33

Proteins were aligned with GldA and the similarity scores were determined using the lalign program (22).