| TCID | Name | Organismal Type | Example |
|---|---|---|---|
| 2.A.56.1.1 | Tripartite dicarboxylate:H+ symporter (substrates include: fumarate, D- and L-malate, succinate, succinamide, orotate, iticonate and mesaconate) (Forward et al., 1997) | Gram-negative bacteria | DctPQM dicarboxylate transporter of Rhodobacter capsulatus DctP (R) DctQ (M, 4 TMS) DctM (M, 12 TMS) |
| 2.A.56.1.2 | The 2,3-diketo-L-gulonate (2,3-DKG) transporter, YiaMNO [2,3-KDG is a breakdown product of L-ascorbate] (Thomas et al., 2006) | Bacteria | YiaMNO of E. coli YiaM (M, 4 TMSs; most like TauL) (P37674) YiaN (M, 12 TMSs; most like DctM) (P37675) YiaO (R, like DctP and TauK) (P37676) |
| 2.A.56.1.3 | Sialic acid (N-acetyl neuraminic acid) transporter, SiaTP (Allen et al., 2005; Severi et al., 2005; Johnston et al., 2008) | Bacteria | SiaTP of Haemophilus influenzae SiaT (a fusion protein equivalent to both DctM and DctQ) (616 aas; 16 TMSs) (P44543) SiaP (R) (P44544) |
| 2.A.56.1.4 | Putative tripartite taurine uptake system, TauKLM (Bruggemann et al., 2004; Denger et al., 2006) | Bacteria | TauKLM of Rhodobacter sphaeroides TauK (Rsph2615) (R) (Q3IVI6) TauL (Rsph2614) (M, 4 TMS) (Q3IVI5) TauM (Rsph2613) (M, 12 TMS) (Q3IVI4) |
| 2.A.56.1.5 | The 2-ketomonocarboxylate transporter (presented in order of affinity - 2-oxovalerate [highest affinity, Kd=0.1 μM], 2-oxoisovalerate, 2-oxobutyrate, 2-oxoisocaproate, 2-oxo-3-methylvalerate, pyruvate [lowest affinity, Kd=3 μM]) (Thomas et al., 2006) | Bacteria | The 2-ketomonocarboxylate transporter of Rhodobacter capsulatus M-large (RRC02479) M-small (RRC02478) R (RRC01191) |
| 2.A.56.1.6 | The putative rhamnogalacturonide transporter (Rodionov et al., 2009) | Proteobacteria | RhiABC of Salmonella typhimurium RhiA (R) (P43020) RhiB (M, 4 TMSs) (Q8ZKR9) RhiC (M, 12 TMSs) (Q8ZKS0) |
| 2.A.56.2.1 | Tripartite high affinity ectoine/hydroxyectoine uptake system (Grammann et al., 2002) | Bacteria | TeaABC ectoine transporter of Halomonas elongata TeaA (R) TeaB (M, 4 TMS) TeaC (M, 12 TMS) |
| 2.A.56.3.1 | Tripartite glutamate:Na+ symporter (Quintero et al., 2001) | Gram-negative bacteria | GtrABC glutamate:Na+ symporter of Synechocystis strain PCC6803 GtrA (M) (like DctQ) GtrB (M) (like DctM) GtrC (R) (like GlnH of E. coli) |
| 2.A.56.3.2 | Tripartite 4-chlorobenzoate symporter (also binds and may transport 4-bromo-, 4-iodo-, and 4-fluorobenzoate and with a lower affinity, 3-chlorobenzoate, 2-chlorobenzoate, 4-hydroxybenzoate, 3-hydroxybenzoate, and benzoate) (Chae and Zylstra, 2006) | Gram-negative bacteria | FcbT1/T2/T3 of Comamonas sp. strain DJ-12 FcbT1 (R) (AAF16407) FcbT2 (M-sm) (AAF16408) FcbT3 (M-lg) (AAF16409) |
