PTS mannitol transporter subunit IICB is a fused IIC/IIB subunit of the phosphoenolpyruvate-dependent sugar phosphotransferase system (PTS), which catalyzes the phosphorylation of incoming mannitol substrates concomitant with their translocation across the cell membrane; IIC forms the translocation channel; IIB is phosphorylated by IIA then transfers the phosphoryl group to the sugar substrate
PTS system, mannitol-specific IIC component; Bacterial PTS transporters transport and ...
9-342
9.75e-142
PTS system, mannitol-specific IIC component; Bacterial PTS transporters transport and concomitantly phosphorylate their sugar substrates, and typically consist of multiple subunits or protein domains. The Fru family is a large and complex family which includes several sequenced fructose and mannitol-specific permeases as well as several putative PTS permeases of unknown specificities.The Fru family PTS systems typically have 3 domains, IIA, IIB and IIC, which may be found as 1 or more proteins. The fructose and mannitol transporters form separate phylogenetic clusters in this family. This family is specific for the IIC domain of the mannitol PTS transporters. [Transport and binding proteins, Carbohydrates, organic alcohols, and acids, Signal transduction, PTS]
Pssm-ID: 129930 Cd Length: 338 Bit Score: 409.21 E-value: 9.75e-142
PTS_IIB_mannitol: subunit IIB of enzyme II (EII) of the mannitol-specific phosphoenolpyruvate: ...
371-456
9.56e-36
PTS_IIB_mannitol: subunit IIB of enzyme II (EII) of the mannitol-specific phosphoenolpyruvate:carbohydrate phosphotransferase system (PTS). In this system, EII is a mannitol-specific permease with two cytoplasmic domains (IIA and IIB) and a transmembrane channel IIC domain. The IIA, IIB, and IIC domains are expressed from the mtlA gene as a single protein, also known as the mannitol PTS permease, the mtl transporter, or MtlA. MtlA is only functional as a dimer with the dimer contacts occuring between the IIC domains. MtlA takes up exogenous mannitol releasing the phosphate ester into the cytoplasm in preparation for oxidation to fructose-6-phosphate by the NAD-dependent mannitol-P dehydrogenase (MtlD). The IIB domain fold includes a central four-stranded parallel open twisted beta-sheet flanked by alpha-helices on both sides. The seven major PTS systems with this IIB fold include mannitol, chitobiose/lichenan, ascorbate, lactose, galactitol, fructose, and a sensory system with similarity to the bacterial bgl system.
Pssm-ID: 99909 [Multi-domain] Cd Length: 87 Bit Score: 127.30 E-value: 9.56e-36
Phosphotransferase system, EIIC; The bacterial phosphoenolpyruvate: sugar phosphotransferase ...
20-277
9.05e-21
Phosphotransferase system, EIIC; The bacterial phosphoenolpyruvate: sugar phosphotransferase system (PTS) is a multi-protein system involved in the regulation of a variety of metabolic and transcriptional processes. The sugar-specific permease of the PTS consists of three domains (IIA, IIB and IIC). The IIC domain catalyzes the transfer of a phosphoryl group from IIB to the sugar substrate.
Pssm-ID: 367061 Cd Length: 315 Bit Score: 92.41 E-value: 9.05e-21
PTS system, mannitol-specific IIC component; Bacterial PTS transporters transport and ...
9-342
9.75e-142
PTS system, mannitol-specific IIC component; Bacterial PTS transporters transport and concomitantly phosphorylate their sugar substrates, and typically consist of multiple subunits or protein domains. The Fru family is a large and complex family which includes several sequenced fructose and mannitol-specific permeases as well as several putative PTS permeases of unknown specificities.The Fru family PTS systems typically have 3 domains, IIA, IIB and IIC, which may be found as 1 or more proteins. The fructose and mannitol transporters form separate phylogenetic clusters in this family. This family is specific for the IIC domain of the mannitol PTS transporters. [Transport and binding proteins, Carbohydrates, organic alcohols, and acids, Signal transduction, PTS]
Pssm-ID: 129930 Cd Length: 338 Bit Score: 409.21 E-value: 9.75e-142
PTS_IIB_mannitol: subunit IIB of enzyme II (EII) of the mannitol-specific phosphoenolpyruvate: ...
371-456
9.56e-36
PTS_IIB_mannitol: subunit IIB of enzyme II (EII) of the mannitol-specific phosphoenolpyruvate:carbohydrate phosphotransferase system (PTS). In this system, EII is a mannitol-specific permease with two cytoplasmic domains (IIA and IIB) and a transmembrane channel IIC domain. The IIA, IIB, and IIC domains are expressed from the mtlA gene as a single protein, also known as the mannitol PTS permease, the mtl transporter, or MtlA. MtlA is only functional as a dimer with the dimer contacts occuring between the IIC domains. MtlA takes up exogenous mannitol releasing the phosphate ester into the cytoplasm in preparation for oxidation to fructose-6-phosphate by the NAD-dependent mannitol-P dehydrogenase (MtlD). The IIB domain fold includes a central four-stranded parallel open twisted beta-sheet flanked by alpha-helices on both sides. The seven major PTS systems with this IIB fold include mannitol, chitobiose/lichenan, ascorbate, lactose, galactitol, fructose, and a sensory system with similarity to the bacterial bgl system.
Pssm-ID: 99909 [Multi-domain] Cd Length: 87 Bit Score: 127.30 E-value: 9.56e-36
Phosphotransferase system, EIIC; The bacterial phosphoenolpyruvate: sugar phosphotransferase ...
20-277
9.05e-21
Phosphotransferase system, EIIC; The bacterial phosphoenolpyruvate: sugar phosphotransferase system (PTS) is a multi-protein system involved in the regulation of a variety of metabolic and transcriptional processes. The sugar-specific permease of the PTS consists of three domains (IIA, IIB and IIC). The IIC domain catalyzes the transfer of a phosphoryl group from IIB to the sugar substrate.
Pssm-ID: 367061 Cd Length: 315 Bit Score: 92.41 E-value: 9.05e-21
PTS_IIB: subunit IIB of enzyme II (EII) is the central energy-coupling domain of the ...
372-456
6.12e-13
PTS_IIB: subunit IIB of enzyme II (EII) is the central energy-coupling domain of the phosphoenolpyruvate:carbohydrate phosphotransferase system (PTS). In the multienzyme PTS complex, EII is a carbohydrate-specific permease consisting of two cytoplasmic domains (IIA and IIB) and a transmembrane channel IIC domain. The IIB domain fold includes a central four-stranded parallel open twisted beta-sheet flanked by alpha-helices on both sides. The seven major PTS systems with this IIB fold include chitobiose/lichenan, ascorbate, lactose, galactitol, mannitol, fructose, and a sensory system with similarity to the bacterial bgl system. The PTS is found only in bacteria, where it catalyzes the transport and phosphorylation of numerous monosaccharides, disaccharides, polyols, amino sugars, and other sugar derivatives. The four proteins (domains) forming the PTS phosphorylation cascade (EI, HPr, EIIA, and EIIB), can phosphorylate or interact with numerous non-PTS proteins thereby regulating their activity.
Pssm-ID: 99904 Cd Length: 84 Bit Score: 64.20 E-value: 6.12e-13
PTS system, Lactose/Cellobiose specific IIB subunit; The bacterial phosphoenolpyruvate: sugar ...
372-455
9.85e-11
PTS system, Lactose/Cellobiose specific IIB subunit; The bacterial phosphoenolpyruvate: sugar phosphotransferase system (PTS) is a multi-protein system involved in the regulation of a variety of metabolic and transcriptional processes. The lactose/cellobiose-specific family are one of four structurally and functionally distinct group IIB PTS system cytoplasmic enzymes. The fold of IIB cellobiose shows similar structure to mammalian tyrosine phosphatases. This family also contains the fructose specific IIB subunit.
Pssm-ID: 396744 Cd Length: 92 Bit Score: 58.11 E-value: 9.85e-11
PTS_IIB_ascorbate: subunit IIB of enzyme II (EII) of the L-ascorbate-specific ...
372-444
1.95e-06
PTS_IIB_ascorbate: subunit IIB of enzyme II (EII) of the L-ascorbate-specific phosphoenolpyruvate:carbohydrate phosphotransferase system (PTS). In this system, EII is an L-ascorbate-specific permease with two cytoplasmic subunits (IIA and IIB) and a transmembrane channel IIC subunit. Subunits IIA, IIB, and IIC are encoded by the sgaA, sgaB, and sgaT genes of the E. coli sgaTBA operon. In some bacteria, the IIB (SgaB) domain is fused C-terminal to the IIA (SgaT) domain. The IIB domain fold includes a central four-stranded parallel open twisted beta-sheet flanked by alpha-helices on both sides. The seven major PTS systems with this IIB fold include ascorbate, chitobiose/lichenan, lactose, galactitol, mannitol, fructose, and a sensory system with similarity to the bacterial bgl system.
Pssm-ID: 99905 Cd Length: 86 Bit Score: 45.59 E-value: 1.95e-06
PTS_IIB_bgl_like: the PTS (phosphotransferase system) IIB domain of a family of sensory ...
371-446
6.07e-03
PTS_IIB_bgl_like: the PTS (phosphotransferase system) IIB domain of a family of sensory systems composed of a membrane-bound sugar-sensor (similar to BglF) and a transcription antiterminator (similar to BglG) which regulate expression of genes involved in sugar utilization. The domain architecture of the IIB-containing protein includes a region N-terminal to the IIB domain which is homologous to the BglG transcription antiterminator with an RNA-binding domain followed by two homologous domains, PRD1 and PRD2 (PTS Regulation Domains). C-terminal to the IIB domain is a domain similar to the PTS IIA domain. In this system, the BglG-like region and the IIB and IIA-like domains are all expressed together as a single multidomain protein. The IIB domain fold includes a central four-stranded parallel open twisted beta-sheet flanked by alpha-helices on both sides. The seven major PTS systems with this IIB fold include this sensory system with similarity to the bacterial bgl system, chitobiose/lichenan, ascorbate, lactose, galactitol, mannitol, and fructose systems.
Pssm-ID: 99910 Cd Length: 85 Bit Score: 35.94 E-value: 6.07e-03
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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