TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
2.A.11.1.1









[Citrate or D-isocitrate]•M2+ (Mg2+ preferring):H+ symporter, CitM (transports Mg2+, Mn2+, Ni2+, Co2+ & Zn2+).  Regulated by the CitS/CitT two component system (Yamamoto et al. 2000; Repizo et al. 2006).

Bacteria
Firmicutes
CitM of Bacillus subtilis
2.A.11.1.2









[Citrate]•M2+ (Ca2+ preferring):H+ symporter, CitH (transports Ca2+, Ba2+ & Sr2+).
Bacteria
Firmicutes
CitH of Bacillus subtilis
2.A.11.1.3









Citrateā€¢Me2+ (Fe2+/Mn2+ preferring):H+ symporter, CitM
Bacteria
Firmicutes
CitM of Streptococcus mutans (AAN58714)
2.A.11.1.4









Citrate-M2+ (Fe3+ preferring): H+ symporter, Cit (transports Fe3+, Ca2+, Pb2+, Ba2+ and Mn2+, but not Mg2+, Ni2+ or Co2+) (Lensbouer et al., 2008).
Bacteria
Actinobacteria
Cit of Streptomyces coelicolor (Q9S242)
2.A.11.1.5









Uncharacterized transporter YraO
Bacteria
Firmicutes
YraO of Bacillus subtilis
2.A.11.1.6









Citrate-inducible divalent cation:citrate uptake transporter, CitH.  Can use Ca2+ or Sr2+ but not Mg2+ as the cotransported cation; The CitAB two component sensor kinase/response regulator system mediates induction by citrate (Brocker et al. 2009).

Bacteria
Actinobacteria
CitH of Corynebacterium glutamicum
2.A.11.2.1









Putative transporter
Bacteria
Firmicutes
Putative transporter of Leuconostoc mesenteroides (Q03YV5)
2.A.11.2.2









Uncharacterized protein of 429 aas

Bacteria
Spirochaetes
UP of Treponema lecithinolyticum
2.A.11.2.3









Uncharacterized protein of 447 aas

Bacteria
Actinobacteria
UP of Nocardiopsis dassonvillei (Actinomadura dassonvillei)