BglG family transcription antiterminator similar to Bacillus subtilis transcriptional regulator MtlR that positively regulates the expression of the mtlAFD operon, which is involved in the uptake and catabolism of mannitol
PTS_IIB_bgl_like: the PTS (phosphotransferase system) IIB domain of a family of sensory ...
415-495
4.32e-22
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: 90.64 E-value: 4.32e-22
PTS_IIB_bgl_like: the PTS (phosphotransferase system) IIB domain of a family of sensory ...
415-495
4.32e-22
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: 90.64 E-value: 4.32e-22
PTS_IIB: subunit IIB of enzyme II (EII) is the central energy-coupling domain of the ...
415-494
2.42e-10
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: 57.27 E-value: 2.42e-10
PRD domain; The PRD domain (for PTS Regulation Domain), is the phosphorylatable regulatory ...
314-400
7.42e-06
PRD domain; The PRD domain (for PTS Regulation Domain), is the phosphorylatable regulatory domain found in bacterial transcriptional antiterminator such as BglG, SacY and LicT, as well as in activators such as MtlR and LevR. The PRD is phosphorylated on one or two conserved histidine residues. PRD-containing proteins are involved in the regulation of catabolic operons in Gram+ and Gram- bacteria and are often characterized by a short N-terminal effector domain that binds to either RNA (CAT-RBD for antiterminators pfam03123) or DNA (for activators), and a duplicated PRD module which is phosphorylated by the sugar phosphotransferase system (PTS) in response to the availability of carbon source. The phosphorylations modify the conformation and stability of the dimeric proteins and thereby the RNA- or DNA-binding activity of the effector domain. The structure of the LicT PRD domains has been solved in both the active (pdb:1h99) and inactive state (pdb:1tlv), revealing massive structural rearrangements upon activation.
Pssm-ID: 459973 [Multi-domain] Cd Length: 90 Bit Score: 44.55 E-value: 7.42e-06
ligand-binding protein LsrB of ABC transporter periplasmic binding protein; Periplasmic ...
487-541
4.32e-03
ligand-binding protein LsrB of ABC transporter periplasmic binding protein; Periplasmic binding domain of autoinducer-2 (AI-2) receptor LsrB from Salmonella typhimurium and its close homologs from other bacteria. The members of this group are homologous to a family of periplasmic pentose/hexose sugar-binding proteins that function as the primary receptors for chemotaxis and transporters of many sugar based solutes in bacteria and archaea and that are a member of the type 1 periplasmic binding protein superfamily. LsrB, which is part of the ABC transporter complex LsrABCD, binds a chemically distinct form of the AI-2 signal that lacks boron, in contrast to the Vibrio harveyi AI-2 signaling molecule that has an unusual furanosyl borate diester. Hence, many bacteria coordinate their gene expression according to the local density of their population by producing species specific AI-2. This process of quorum sensing allows LsrB to function as a periplasmic AI-2 binding protein in interspecies signaling.
Pssm-ID: 380658 Cd Length: 298 Bit Score: 39.57 E-value: 4.32e-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.
of the residues that compose this conserved feature have been mapped to the query sequence.
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