TCDB is operated by the Saier Lab Bioinformatics Group
TCIDNameOrganismal TypeExample
4.A.3.1.1
Lactose (Lac) porter
Bacteria
Lactose (Lac) IICB-IIA complex of Staphylococcus aureus
IIA (LacF) (P02909)
IIBC (LacE) (P11162)
4.A.3.2.1
N,N'-diacetylchitobiose (Chb) porter (also transports cellobiose; Kachroo et al., 2007).
Bacteria
N,N'-diacetylchitobiose (Chb) IIC-IIB-IIA complex of E. coli
IIA (ChbA), spP17335
IIB (ChbB), spP17409
IIC (ChbC), spP17334
4.A.3.2.2
Lichenan oligosaccharide (Lic) porter
Bacteria
Lichenan oligosaccharide (Lic) IIC-IIB-IIA complex of Bacillus subtilis
IIA (LicA), spP46319
IIB (LicB), spP46318
IIC (LicC), spP46317
4.A.3.2.3
N,N'diacetylchitobiose porter, ChbABC
Bacteria
N,N'diacetylchitobiose (Chb) IIC-IIB-IIA complex of Borrelia burgdorferi
IIA (ChbA), AAC66323
IIB (ChbB), AAC66322
IIC (ChbC), AAC66324
4.A.3.2.4

The cellobiose-specific (PtcA-PtcB-CelB) porter (Kowalczyk et al., 2008 ).

Bacteria

PtcA-PtcB-CelB of Lactococcus lactis:
CelB (C)(Q9CJ32) PtcB (B)(Q9CIF0) PtcA (A)(Q9CIE9)
4.A.3.2.5
The N,N' -diacetylchitobiose Enzyme II (Toratani et al., 2008) (>80% identical to the E. coli enzyme (4.A.3.2.1))
Proteobacteria
The N,N' -diacetylchitobiose Enzyme II of Serratia marcescens
IIA (ChbA) - Q8L3C4
IIB (ChbB) - Q8L3C3
IIC (ChbC) - Q8L3C2
4.A.3.2.6
Glucosamine β(1→4) glucosamine (GlcN)2 (glucosamine dimer) transporter, VC1281-1283 (IIB; IIC; IIA, respectively) (Meibom et al., 2004)
Proteobacteria
(GlcN)2 transporter of Vibrio cholerae (IIA-IIB-IIC)
IIB (Q9KSH5)
IIA (Q9KSH3)
IIC (Q9KSH4)