TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameDomainKingdom/PhylumProtein(s)
*2.A.80.1.1









The tricarboxylate transporter, TctABC (Somers and Kay 1983; Winnen et al. 2003).  The high resolution structure of the receptor, TctC, is known (Sweet et al. 1984).

Bacteria
Proteobacteria
TctABC of Salmonella enterica
TctA (M, 12 TMS)
TctB (M, 4 TMS)
TctC (R)
*2.A.80.1.2









Terephthalate (TPA) aromatic acid uptake transport system, TpiBA/TphC (Hosaka et al. 2013).  May transport several aromatic acids including isophthalate, o-phthalate and protocatechuate.  Consists of three subunits: TpiB (503 aas and 13 TMSs), TpiA (162 aas and 4-5 TMSs) and TphC (322 aas and 1 TMS. tpiAB comprise an operon while tphC maps elsewhere.  o-phthalate and protocatecuate may use other receptors (Hosaka et al. 2013).

Bacteria
Proteobacteria
TpiBA/TphC of Comamonas sp. strain E6
TpiB (M, large) (S6BBY9)
TpiA (M, small) (S6CBZ0)
TphC (R)
*2.A.80.1.3









The putative tricarboxylic acid transporter, TctABC.  This organism is claimed to have 66 TCT family members (Ma et al. 2009).  The organism utilizes many aromatic and non-aromatic acids that could be substrates of these transporters. 

Bacteria
Proteobacteria
TctABC of Comamonas testosteroni
TctA (M, large) (D0J0R9)
TctB (M, small) (D0J2J4)
TctC (R) (D0J060)
*2.A.80.1.4









Pmf-dependent citrate uptake porter, TctABC (Brocker et al. 2009).

Bacteria
Actinobacteria
TctABC of Corynebacterium glutamicum
TctA (M, large; 510 aas) (S5Y5N9)
TctB (M, small; 188 aas) (S5XH28)
TctC (R) (334 aas) (S5XTE7)
*2.A.80.2.1









TctA homologue; 12 TMSs; DUF112

Archaea
Euryarchaeota
TctA homologue of Methanosarcina mazei
*2.A.80.2.2









TctA homologue, 12 TMSs; DUF112

Archaea
Euryarchaeota
TctA homologue of Archeoglobus fulgidus