Flavoprotein; This family contains diverse flavoprotein enzymes. This family includes ...
30-201
6.48e-55
Flavoprotein; This family contains diverse flavoprotein enzymes. This family includes epidermin biosynthesis protein, EpiD, which has been shown to be a flavoprotein that binds FMN. This enzyme catalyzes the removal of two reducing equivalents from the cysteine residue of the C-terminal meso-lanthionine of epidermin to form a --C==C-- double bond. This family also includes the B chain of dipicolinate synthase a small polar molecule that accumulates to high concentrations in bacterial endospores, and is thought to play a role in spore heat resistance, or the maintenance of heat resistance. dipicolinate synthase catalyzes the formation of dipicolinic acid from dihydroxydipicolinic acid. This family also includes phenyl-acrylic acid decarboxylase (EC:4.1.1.-).
The actual alignment was detected with superfamily member PLN02496:
Pssm-ID: 450266 Cd Length: 209 Bit Score: 185.56 E-value: 6.48e-55
thymidylate synthase; Members of this protein family are thymidylate synthase, an enzyme that ...
332-625
3.05e-117
thymidylate synthase; Members of this protein family are thymidylate synthase, an enzyme that produces dTMP from dUMP. In prokaryotes, its gene usually is found close to that for dihydrofolate reductase, and in some systems the two enzymes are found as a fusion protein. This model excludes a set of related proteins (TIGR03283) that appears to replace this family in archaeal methanogens, where tetrahydrofolate is replaced by tetrahydromethanopterin. [Purines, pyrimidines, nucleosides, and nucleotides, 2'-Deoxyribonucleotide metabolism]
Pssm-ID: 213790 [Multi-domain] Cd Length: 295 Bit Score: 350.97 E-value: 3.05e-117
Thymidylate synthase and pyrimidine hydroxymethylase: Thymidylate synthase (TS) and ...
332-575
4.49e-109
Thymidylate synthase and pyrimidine hydroxymethylase: Thymidylate synthase (TS) and deoxycytidylate hydroxymethylase (dCMP-HMase) are homologs that catalyze analogous alkylation of C5 of pyrimidine nucleotides. Both enzymes are involved in the biosynthesis of DNA precursors and are active as homodimers. However, they exhibit distinct pyrimidine base specificities and differ in the details of their catalyzed reactions. TS is biologically ubiquitous and catalyzes the conversion of dUMP and methylene-tetrahydrofolate (CH2THF) to dTMP and dihydrofolate (DHF). It also acts as a regulator of its own expression by binding and inactivating its own RNA. Due to its key role in the de novo pathway for thymidylate synthesis and, hence, DNA synthesis, it is one of the most conserved enzymes across species and phyla. TS is a well-recognized target for anticancer chemotherapy, as well as a valuable new target against infectious diseases. Interestingly, in several protozoa, a single polypeptide chain codes for both, dihydrofolate reductase (DHFR) and thymidylate synthase (TS), forming a bifunctional enzyme (DHFR-TS), possibly through gene fusion at a single evolutionary point. DHFR-TS is also active as a dimer. Virus encoded dCMP-HMase catalyzes the reversible conversion of dCMP and CH2THF to hydroxymethyl-dCMP and THF. This family also includes dUMP hydroxymethylase, which is encoded by several bacteriophages that infect Bacillus subtilis, for their own protection against the host restriction system, and contain hydroxymethyl-dUMP instead of dTMP in their DNA.
Pssm-ID: 238211 Cd Length: 215 Bit Score: 326.93 E-value: 4.49e-109
Phosphopantothenoylcysteine synthetase/decarboxylase CoaBC [Coenzyme transport and metabolism]; ...
32-221
8.41e-51
Phosphopantothenoylcysteine synthetase/decarboxylase CoaBC [Coenzyme transport and metabolism]; Phosphopantothenoylcysteine synthetase/decarboxylase CoaBC is part of the Pathway/BioSystem: Pantothenate/CoA biosynthesis
Pssm-ID: 440221 [Multi-domain] Cd Length: 399 Bit Score: 180.61 E-value: 8.41e-51
Flavoprotein; This family contains diverse flavoprotein enzymes. This family includes ...
32-213
3.40e-44
Flavoprotein; This family contains diverse flavoprotein enzymes. This family includes epidermin biosynthesis protein, EpiD, which has been shown to be a flavoprotein that binds FMN. This enzyme catalyzes the removal of two reducing equivalents from the cysteine residue of the C-terminal meso-lanthionine of epidermin to form a --C==C-- double bond. This family also includes the B chain of dipicolinate synthase a small polar molecule that accumulates to high concentrations in bacterial endospores, and is thought to play a role in spore heat resistance, or the maintenance of heat resistance. dipicolinate synthase catalyzes the formation of dipicolinic acid from dihydroxydipicolinic acid. This family also includes phenyl-acrylic acid decarboxylase (EC:4.1.1.-).
Pssm-ID: 426775 [Multi-domain] Cd Length: 177 Bit Score: 155.61 E-value: 3.40e-44
phosphopantothenoylcysteine decarboxylase / phosphopantothenate--cysteine ligase; This model ...
32-221
8.29e-42
phosphopantothenoylcysteine decarboxylase / phosphopantothenate--cysteine ligase; This model represents a bifunctional enzyme that catalyzes the second and third steps (cysteine ligation, EC 6.3.2.5, and decarboxylation, EC 4.1.1.36) in the biosynthesis of coenzyme A (CoA) from pantothenate in bacteria. In early descriptions of this flavoprotein, a ts mutation in one region of the protein appeared to cause a defect in DNA metaobolism rather than an increased need for the pantothenate precursor beta-alanine. This protein was then called dfp, for DNA/pantothenate metabolism flavoprotein. The authors responsible for detecting phosphopantothenate--cysteine ligase activity suggest renaming this bifunctional protein coaBC for its role in CoA biosynthesis. This enzyme contains the FMN cofactor, but no FAD or pyruvoyl group. The amino-terminal region contains the phosphopantothenoylcysteine decarboxylase activity. [Biosynthesis of cofactors, prosthetic groups, and carriers, Pantothenate and coenzyme A]
Pssm-ID: 273116 [Multi-domain] Cd Length: 391 Bit Score: 155.61 E-value: 8.29e-42
thymidylate synthase; Members of this protein family are thymidylate synthase, an enzyme that ...
332-625
3.05e-117
thymidylate synthase; Members of this protein family are thymidylate synthase, an enzyme that produces dTMP from dUMP. In prokaryotes, its gene usually is found close to that for dihydrofolate reductase, and in some systems the two enzymes are found as a fusion protein. This model excludes a set of related proteins (TIGR03283) that appears to replace this family in archaeal methanogens, where tetrahydrofolate is replaced by tetrahydromethanopterin. [Purines, pyrimidines, nucleosides, and nucleotides, 2'-Deoxyribonucleotide metabolism]
Pssm-ID: 213790 [Multi-domain] Cd Length: 295 Bit Score: 350.97 E-value: 3.05e-117
Thymidylate synthase and pyrimidine hydroxymethylase: Thymidylate synthase (TS) and ...
332-575
4.49e-109
Thymidylate synthase and pyrimidine hydroxymethylase: Thymidylate synthase (TS) and deoxycytidylate hydroxymethylase (dCMP-HMase) are homologs that catalyze analogous alkylation of C5 of pyrimidine nucleotides. Both enzymes are involved in the biosynthesis of DNA precursors and are active as homodimers. However, they exhibit distinct pyrimidine base specificities and differ in the details of their catalyzed reactions. TS is biologically ubiquitous and catalyzes the conversion of dUMP and methylene-tetrahydrofolate (CH2THF) to dTMP and dihydrofolate (DHF). It also acts as a regulator of its own expression by binding and inactivating its own RNA. Due to its key role in the de novo pathway for thymidylate synthesis and, hence, DNA synthesis, it is one of the most conserved enzymes across species and phyla. TS is a well-recognized target for anticancer chemotherapy, as well as a valuable new target against infectious diseases. Interestingly, in several protozoa, a single polypeptide chain codes for both, dihydrofolate reductase (DHFR) and thymidylate synthase (TS), forming a bifunctional enzyme (DHFR-TS), possibly through gene fusion at a single evolutionary point. DHFR-TS is also active as a dimer. Virus encoded dCMP-HMase catalyzes the reversible conversion of dCMP and CH2THF to hydroxymethyl-dCMP and THF. This family also includes dUMP hydroxymethylase, which is encoded by several bacteriophages that infect Bacillus subtilis, for their own protection against the host restriction system, and contain hydroxymethyl-dUMP instead of dTMP in their DNA.
Pssm-ID: 238211 Cd Length: 215 Bit Score: 326.93 E-value: 4.49e-109
Phosphopantothenoylcysteine synthetase/decarboxylase CoaBC [Coenzyme transport and metabolism]; ...
32-221
8.41e-51
Phosphopantothenoylcysteine synthetase/decarboxylase CoaBC [Coenzyme transport and metabolism]; Phosphopantothenoylcysteine synthetase/decarboxylase CoaBC is part of the Pathway/BioSystem: Pantothenate/CoA biosynthesis
Pssm-ID: 440221 [Multi-domain] Cd Length: 399 Bit Score: 180.61 E-value: 8.41e-51
Flavoprotein; This family contains diverse flavoprotein enzymes. This family includes ...
32-213
3.40e-44
Flavoprotein; This family contains diverse flavoprotein enzymes. This family includes epidermin biosynthesis protein, EpiD, which has been shown to be a flavoprotein that binds FMN. This enzyme catalyzes the removal of two reducing equivalents from the cysteine residue of the C-terminal meso-lanthionine of epidermin to form a --C==C-- double bond. This family also includes the B chain of dipicolinate synthase a small polar molecule that accumulates to high concentrations in bacterial endospores, and is thought to play a role in spore heat resistance, or the maintenance of heat resistance. dipicolinate synthase catalyzes the formation of dipicolinic acid from dihydroxydipicolinic acid. This family also includes phenyl-acrylic acid decarboxylase (EC:4.1.1.-).
Pssm-ID: 426775 [Multi-domain] Cd Length: 177 Bit Score: 155.61 E-value: 3.40e-44
phosphopantothenoylcysteine decarboxylase / phosphopantothenate--cysteine ligase; This model ...
32-221
8.29e-42
phosphopantothenoylcysteine decarboxylase / phosphopantothenate--cysteine ligase; This model represents a bifunctional enzyme that catalyzes the second and third steps (cysteine ligation, EC 6.3.2.5, and decarboxylation, EC 4.1.1.36) in the biosynthesis of coenzyme A (CoA) from pantothenate in bacteria. In early descriptions of this flavoprotein, a ts mutation in one region of the protein appeared to cause a defect in DNA metaobolism rather than an increased need for the pantothenate precursor beta-alanine. This protein was then called dfp, for DNA/pantothenate metabolism flavoprotein. The authors responsible for detecting phosphopantothenate--cysteine ligase activity suggest renaming this bifunctional protein coaBC for its role in CoA biosynthesis. This enzyme contains the FMN cofactor, but no FAD or pyruvoyl group. The amino-terminal region contains the phosphopantothenoylcysteine decarboxylase activity. [Biosynthesis of cofactors, prosthetic groups, and carriers, Pantothenate and coenzyme A]
Pssm-ID: 273116 [Multi-domain] Cd Length: 391 Bit Score: 155.61 E-value: 8.29e-42
thymidylate synthase, methanogen type; Thymidylate synthase makes dTMP for DNA synthesis, and ...
459-567
1.22e-06
thymidylate synthase, methanogen type; Thymidylate synthase makes dTMP for DNA synthesis, and is among the most widely distributed of all enzymes. Members of this protein family are encoded within a completed genome sequence if and only if that species is one of the methanogenenic archaea. In these species, tetrahydromethanopterin replaces tetrahydrofolate, The member from Methanobacterium thermoautotrophicum was shown to behave as a thymidylate synthase based on similar side reactions (the exchange of a characteristic proton with water), although the full reaction was not reconstituted. Partial sequence data showed no similarity to known thymidylate synthases simply because the region sequenced was from a distinctive N-terminal region not found in other thymidylate synthases. Members of this protein family appear, therefore, to a novel, tetrahydromethanopterin-dependent thymidylate synthase. [Purines, pyrimidines, nucleosides, and nucleotides, 2'-Deoxyribonucleotide metabolism]
Pssm-ID: 132326 Cd Length: 199 Bit Score: 49.35 E-value: 1.22e-06
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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