tRNA-dihydrouridine synthase family protein such as tRNA-dihydrouridine synthase, which catalyzes the synthesis of dihydrouridine, a modified base found in the D-loop of most tRNAs
Dihydrouridine synthase-like (DUS-like) FMN-binding domain. Members of this family catalyze ...
28-257
6.76e-109
Dihydrouridine synthase-like (DUS-like) FMN-binding domain. Members of this family catalyze the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archaea. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. 1VHN, a putative flavin oxidoreductase, has high sequence similarity to DUS. The enzymatic mechanism of 1VHN is not known at the present.
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Pssm-ID: 239200 [Multi-domain] Cd Length: 231 Bit Score: 315.97 E-value: 6.76e-109
Dihydrouridine synthase-like (DUS-like) FMN-binding domain. Members of this family catalyze ...
28-257
6.76e-109
Dihydrouridine synthase-like (DUS-like) FMN-binding domain. Members of this family catalyze the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archaea. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. 1VHN, a putative flavin oxidoreductase, has high sequence similarity to DUS. The enzymatic mechanism of 1VHN is not known at the present.
Pssm-ID: 239200 [Multi-domain] Cd Length: 231 Bit Score: 315.97 E-value: 6.76e-109
Dihydrouridine synthase (Dus); Members of this family catalyze the reduction of the 5,6-double ...
32-288
1.14e-78
Dihydrouridine synthase (Dus); Members of this family catalyze the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archae. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. Dus 1 from Saccharomyces cerevisiae acts on pre-tRNA-Phe, while Dus 2 acts on pre-tRNA-Tyr and pre-tRNA-Leu. Dus 1 is active as a single subunit, requiring NADPH or NADH, and is stimulated by the presence of FAD. Some family members may be targeted to the mitochondria and even have a role in mitochondria.
Pssm-ID: 426126 Cd Length: 309 Bit Score: 241.85 E-value: 1.14e-78
tRNA-dihydrouridine synthase [Translation, ribosomal structure and biogenesis]; ...
32-251
1.94e-69
tRNA-dihydrouridine synthase [Translation, ribosomal structure and biogenesis]; tRNA-dihydrouridine synthase is part of the Pathway/BioSystem: tRNA modification
Pssm-ID: 439812 [Multi-domain] Cd Length: 310 Bit Score: 218.42 E-value: 1.94e-69
putative TIM-barrel protein, nifR3 family; This model represents one branch of COG0042 ...
30-251
5.26e-44
putative TIM-barrel protein, nifR3 family; This model represents one branch of COG0042 (Predicted TIM-barrel enzymes, possibly dehydrogenases, nifR3 family). This branch includes NifR3 itself, from Rhodobacter capsulatus. It excludes a broadly distributed but more sparsely populated subfamily that contains sll0926 from Synechocystis PCC6803, HI0634 from Haemophilus influenzae, and BB0225 from Borrelia burgdorferi. It also excludes a shorter and more distant archaeal subfamily.The function of nifR3, a member of this family, is unknown, but it is found in an operon with nitrogen-sensing two component regulators in Rhodobacter capsulatus.Members of this family show a distant relationship to alpha/beta (TIM) barrel enzymes such as dihydroorotate dehydrogenase and glycolate oxidase. [Unknown function, General]
Pssm-ID: 129820 Cd Length: 319 Bit Score: 152.90 E-value: 5.26e-44
Dihydrouridine synthase-like (DUS-like) FMN-binding domain. Members of this family catalyze ...
28-257
6.76e-109
Dihydrouridine synthase-like (DUS-like) FMN-binding domain. Members of this family catalyze the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archaea. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. 1VHN, a putative flavin oxidoreductase, has high sequence similarity to DUS. The enzymatic mechanism of 1VHN is not known at the present.
Pssm-ID: 239200 [Multi-domain] Cd Length: 231 Bit Score: 315.97 E-value: 6.76e-109
Dihydrouridine synthase (Dus); Members of this family catalyze the reduction of the 5,6-double ...
32-288
1.14e-78
Dihydrouridine synthase (Dus); Members of this family catalyze the reduction of the 5,6-double bond of a uridine residue on tRNA. Dihydrouridine modification of tRNA is widely observed in prokaryotes and eukaryotes, and also in some archae. Most dihydrouridines are found in the D loop of t-RNAs. The role of dihydrouridine in tRNA is currently unknown, but may increase conformational flexibility of the tRNA. It is likely that different family members have different substrate specificities, which may overlap. Dus 1 from Saccharomyces cerevisiae acts on pre-tRNA-Phe, while Dus 2 acts on pre-tRNA-Tyr and pre-tRNA-Leu. Dus 1 is active as a single subunit, requiring NADPH or NADH, and is stimulated by the presence of FAD. Some family members may be targeted to the mitochondria and even have a role in mitochondria.
Pssm-ID: 426126 Cd Length: 309 Bit Score: 241.85 E-value: 1.14e-78
tRNA-dihydrouridine synthase [Translation, ribosomal structure and biogenesis]; ...
32-251
1.94e-69
tRNA-dihydrouridine synthase [Translation, ribosomal structure and biogenesis]; tRNA-dihydrouridine synthase is part of the Pathway/BioSystem: tRNA modification
Pssm-ID: 439812 [Multi-domain] Cd Length: 310 Bit Score: 218.42 E-value: 1.94e-69
putative TIM-barrel protein, nifR3 family; This model represents one branch of COG0042 ...
30-251
5.26e-44
putative TIM-barrel protein, nifR3 family; This model represents one branch of COG0042 (Predicted TIM-barrel enzymes, possibly dehydrogenases, nifR3 family). This branch includes NifR3 itself, from Rhodobacter capsulatus. It excludes a broadly distributed but more sparsely populated subfamily that contains sll0926 from Synechocystis PCC6803, HI0634 from Haemophilus influenzae, and BB0225 from Borrelia burgdorferi. It also excludes a shorter and more distant archaeal subfamily.The function of nifR3, a member of this family, is unknown, but it is found in an operon with nitrogen-sensing two component regulators in Rhodobacter capsulatus.Members of this family show a distant relationship to alpha/beta (TIM) barrel enzymes such as dihydroorotate dehydrogenase and glycolate oxidase. [Unknown function, General]
Pssm-ID: 129820 Cd Length: 319 Bit Score: 152.90 E-value: 5.26e-44
tRNA dihydrouridine synthase A; This model represents one branch of COG0042 (Predicted ...
32-251
6.34e-24
tRNA dihydrouridine synthase A; This model represents one branch of COG0042 (Predicted TIM-barrel enzymes, possibly dehydrogenases, nifR3 family). It represents a distinct subset by a set of shared unique motifs, a conserved pattern of insertions/deletions relative to other nifR3 homologs, and by subclustering based on cross-genome bidirectional best hits. Members are found in species as diverse as the proteobacteria, a spirochete, a cyanobacterium, and Deinococcus radiodurans. NifR3 itself, a protein of unknown function associated with nitrogen regulation in Rhodobacter capsulatus, is not a member of this branch. Members of this family show a distant relationship to alpha/beta (TIM) barrel enzymes such as dihydroorotate dehydrogenase and glycolate oxidase. [Protein synthesis, tRNA and rRNA base modification]
Pssm-ID: 129825 Cd Length: 318 Bit Score: 99.51 E-value: 6.34e-24
Old yellow enzyme (OYE)-like FMN binding domain. OYE was the first flavin-dependent enzyme ...
126-247
9.57e-13
Old yellow enzyme (OYE)-like FMN binding domain. OYE was the first flavin-dependent enzyme identified, however its true physiological role remains elusive to this day. Each monomer of OYE contains FMN as a non-covalently bound cofactor, uses NADPH as a reducing agent with oxygens, quinones, and alpha,beta-unsaturated aldehydes and ketones, and can act as electron acceptors in the catalytic reaction. Members of OYE family include trimethylamine dehydrogenase, 2,4-dienoyl-CoA reductase, enoate reductase, pentaerythriol tetranitrate reductase, xenobiotic reductase, and morphinone reductase.
Pssm-ID: 239201 [Multi-domain] Cd Length: 327 Bit Score: 67.60 E-value: 9.57e-13
Old yellow enzyme (OYE)-related FMN binding domain, group 2. Each monomer of OYE contains FMN ...
126-249
2.05e-07
Old yellow enzyme (OYE)-related FMN binding domain, group 2. Each monomer of OYE contains FMN as a non-covalently bound cofactor, uses NADPH as a reducing agent with oxygens, quinones, and alpha,beta-unsaturated aldehydes and ketones, and can act as electron acceptors in the catalytic reaction. Other members of OYE family include trimethylamine dehydrogenase, 2,4-dienoyl-CoA reductase, enoate reductase, pentaerythriol tetranitrate reductase, xenobiotic reductase, and morphinone reductase.
Pssm-ID: 240084 [Multi-domain] Cd Length: 338 Bit Score: 51.82 E-value: 2.05e-07
TIM barrel proteins share a structurally conserved phosphate binding motif and in general ...
83-241
2.62e-05
TIM barrel proteins share a structurally conserved phosphate binding motif and in general share an eight beta/alpha closed barrel structure. Specific for this family is the conserved phosphate binding site at the edges of strands 7 and 8. The phosphate comes either from the substrate, as in the case of inosine monophosphate dehydrogenase (IMPDH), or from ribulose-5-phosphate 3-epimerase (RPE) or from cofactors, like FMN.
Pssm-ID: 240073 [Multi-domain] Cd Length: 200 Bit Score: 44.50 E-value: 2.62e-05
Dihydroorotate dehydrogenase (DHOD) and Dihydropyrimidine dehydrogenase (DHPD) FMN-binding ...
64-190
4.87e-05
Dihydroorotate dehydrogenase (DHOD) and Dihydropyrimidine dehydrogenase (DHPD) FMN-binding domain. DHOD catalyzes the oxidation of (S)-dihydroorotate to orotate. This is the fourth step and the only redox reaction in the de novo biosynthesis of UMP, the precursor of all pyrimidine nucleotides. DHOD requires FMN as co-factor. DHOD divides into class 1 and class 2 based on their amino acid sequences and cellular location. Members of class 1 are cytosolic enzymes and multimers while class 2 enzymes are membrane associated and monomeric. The class 1 enzymes can be further divided into subtypes 1A and 1B which are homodimers and heterotetrameric proteins, respectively. DHPD catalyzes the first step in pyrimidine degradation: the NADPH-dependent reduction of uracil and thymine to the corresponding 5,6-dihydropyrimidines. DHPD contains two FAD, two FMN and eight [4Fe-4S] clusters, arranged in two electron transfer chains that pass its homodimeric interface twice. Two of the Fe-S clusters show a hitherto unobserved coordination involving a glutamine residue.
Pssm-ID: 239204 [Multi-domain] Cd Length: 289 Bit Score: 44.27 E-value: 4.87e-05
Old yellow enzyme (OYE) YqjM-like FMN binding domain. YqjM is involved in the oxidative stress ...
205-247
2.14e-04
Old yellow enzyme (OYE) YqjM-like FMN binding domain. YqjM is involved in the oxidative stress response of Bacillus subtilis. Like the other OYE members, each monomer of YqjM contains FMN as a non-covalently bound cofactor and uses NADPH as a reducing agent. The YqjM enzyme exists as a homotetramer that is assembled as a dimer of catalytically dependent dimers, while other OYE members exist only as monomers or dimers. Moreover, the protein displays a shared active site architecture where an arginine finger at the COOH terminus of one monomer extends into the active site of the adjacent monomer and is directly involved in substrate recognition. Another remarkable difference in the binding of the ligand in YqjM is represented by the contribution of the NH2-terminal tyrosine instead of a COOH-terminal tyrosine in OYE and its homologs.
Pssm-ID: 239242 [Multi-domain] Cd Length: 336 Bit Score: 42.48 E-value: 2.14e-04
Dihydroorotate dehydrogenase (DHOD) class 1B FMN-binding domain. DHOD catalyzes the oxidation ...
64-225
6.71e-04
Dihydroorotate dehydrogenase (DHOD) class 1B FMN-binding domain. DHOD catalyzes the oxidation of (S)-dihydroorotate to orotate. This is the fourth step and the only redox reaction in the de novo biosynthesis of UMP, the precursor of all pyrimidine nucleotides. DHOD requires FMN as co-factor. DHOD divides into class 1 and class 2 based on their amino acid sequences and cellular location. Members of class 1 are cytosolic enzymes and multimers while class 2 enzymes are membrane associated and monomeric. The class 1 enzymes can be further divided into subtypes 1A and 1B which are homodimers and heterotetrameric proteins, respectively.
Pssm-ID: 240091 [Multi-domain] Cd Length: 296 Bit Score: 40.61 E-value: 6.71e-04
Thiamine monophosphate synthase; Thiamine monophosphate synthase (TMP) (EC:2.5.1.3) catalyzes the substitution of the pyrophosphate of 2-methyl-4-amino-5- hydroxymethylpyrimidine pyrophosphate by 4-methyl-5- (beta-hydroxyethyl)thiazole phosphate to yield thiamine phosphate. This Pfam family also includes the regulatory protein TENI, a protein from Bacillus subtilis that regulates the production of several extracellular enzymes by reducing alkaline protease production. While TenI shows high sequence similarity with thiamin phosphate synthase, the purified protein has no thiamin phosphate synthase activity. Instead, it is a thiazole tautomerase.
Pssm-ID: 426849 [Multi-domain] Cd Length: 180 Bit Score: 38.30 E-value: 2.45e-03
Old yellow enzyme (OYE)-related FMN binding domain, group 4. Each monomer of OYE contains FMN ...
126-247
5.92e-03
Old yellow enzyme (OYE)-related FMN binding domain, group 4. Each monomer of OYE contains FMN as a non-covalently bound cofactor, uses NADPH as a reducing agent with oxygens, quinones, and alpha,beta-unsaturated aldehydes and ketones, and can act as electron acceptors in the catalytic reaction. Other members of OYE family include trimethylamine dehydrogenase, 2,4-dienoyl-CoA reductase, enoate reductase, pentaerythriol tetranitrate reductase, xenobiotic reductase, and morphinone reductase.
Pssm-ID: 240086 [Multi-domain] Cd Length: 353 Bit Score: 37.96 E-value: 5.92e-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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