thioredoxin domain-containing protein may function as a thiol disulfide oxidoreductase that catalyzes the oxidation or reduction of protein disulfide bonds using an active site dithiol, present in a CXXC motif
Protein Disulfide Oxidoreductases and Other Proteins with a Thioredoxin fold; The thioredoxin ...
37-262
2.23e-92
Protein Disulfide Oxidoreductases and Other Proteins with a Thioredoxin fold; The thioredoxin (TRX)-like superfamily is a large, diverse group of proteins containing a TRX fold. Many members contain a classic TRX domain with a redox active CXXC motif. They function as protein disulfide oxidoreductases (PDOs), altering the redox state of target proteins via the reversible oxidation of their active site dithiol. The PDO members of this superfamily include the families of TRX, protein disulfide isomerase (PDI), tlpA, glutaredoxin, NrdH redoxin, and bacterial Dsb proteins (DsbA, DsbC, DsbG, DsbE, DsbDgamma). Members of the superfamily that do not function as PDOs but contain a TRX-fold domain include phosducins, peroxiredoxins, glutathione (GSH) peroxidases, SCO proteins, GSH transferases (GST, N-terminal domain), arsenic reductases, TRX-like ferredoxins and calsequestrin, among others.
The actual alignment was detected with superfamily member PRK13703:
Pssm-ID: 469754 Cd Length: 248 Bit Score: 272.76 E-value: 2.23e-92
type-F conjugative transfer system pilin assembly protein TraF; This protein is part of a ...
30-262
7.76e-80
type-F conjugative transfer system pilin assembly protein TraF; This protein is part of a large group of proteins involved in conjugative transfer of plasmid DNA, specifically the F-type system. This protein has been predicted to contain a thioredoxin fold and has been shown to be localized to the periplasm. Unlike the related protein TrbB (TIGR02738), TraF does not contain a conserved pair of cysteines and has been shown not to function as a thiol disulfide isomerase by complementation of an Ecoli DsbA defect. The protein is believed to be involved in pilin assembly. Even more closely related than TrbB is a clade of genes (TIGR02740) which do contain the CXXC motif, but it is unclear whether these genes are involved in type-F conjugation systems per se.
Pssm-ID: 274274 Cd Length: 256 Bit Score: 241.15 E-value: 7.76e-80
F plasmid transfer operon protein; TraF protein undergoes proteolytic processing associated ...
38-252
4.73e-61
F plasmid transfer operon protein; TraF protein undergoes proteolytic processing associated with export. The 19 amino acids at the amino terminus of the polypeptides appear to constitute a typical membrane leader peptide - not included in this family, while the remainder of the molecule is predicted to be primarily hydrophilic in character. F plasmid TraF and TraH are required for F pilus assembly and F plasmid transfer, and they are both localized to the outer membrane in the presence of the complete F transfer region, especially TraV, the putative anchor.
Pssm-ID: 433436 [Multi-domain] Cd Length: 224 Bit Score: 192.14 E-value: 4.73e-61
type-F conjugative transfer system pilin assembly protein TraF; This protein is part of a ...
30-262
7.76e-80
type-F conjugative transfer system pilin assembly protein TraF; This protein is part of a large group of proteins involved in conjugative transfer of plasmid DNA, specifically the F-type system. This protein has been predicted to contain a thioredoxin fold and has been shown to be localized to the periplasm. Unlike the related protein TrbB (TIGR02738), TraF does not contain a conserved pair of cysteines and has been shown not to function as a thiol disulfide isomerase by complementation of an Ecoli DsbA defect. The protein is believed to be involved in pilin assembly. Even more closely related than TrbB is a clade of genes (TIGR02740) which do contain the CXXC motif, but it is unclear whether these genes are involved in type-F conjugation systems per se.
Pssm-ID: 274274 Cd Length: 256 Bit Score: 241.15 E-value: 7.76e-80
F plasmid transfer operon protein; TraF protein undergoes proteolytic processing associated ...
38-252
4.73e-61
F plasmid transfer operon protein; TraF protein undergoes proteolytic processing associated with export. The 19 amino acids at the amino terminus of the polypeptides appear to constitute a typical membrane leader peptide - not included in this family, while the remainder of the molecule is predicted to be primarily hydrophilic in character. F plasmid TraF and TraH are required for F pilus assembly and F plasmid transfer, and they are both localized to the outer membrane in the presence of the complete F transfer region, especially TraV, the putative anchor.
Pssm-ID: 433436 [Multi-domain] Cd Length: 224 Bit Score: 192.14 E-value: 4.73e-61
TraF-like protein; This protein is related to the F-type conjugation system pilus assembly ...
38-255
3.13e-36
TraF-like protein; This protein is related to the F-type conjugation system pilus assembly proteins TraF (TIGR02739)and TrbB (TIGR02738) both of which exhibit a thioredoxin fold. The protein represented by this model has the same length and architecture as TraF, but lacks the CXXC-motif found in TrbB and believed to be responsible for the disulfide isomerase activity of that protein.
Pssm-ID: 274275 Cd Length: 271 Bit Score: 129.46 E-value: 3.13e-36
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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