radical SAM protein generates radicals by combining a 4Fe-4S cluster and S-adenosylmethionine (SAM) in close proximity; contains a conserved CxxxCxxC motif, which coordinates the conserved iron-sulfur cluster; transfers a single electron from the iron-sulfur cluster to SAM leads to its reductive cleavage to methionine and a 5'-deoxyadenosyl radical
Radical SAM superfamily; Radical SAM proteins catalyze diverse reactions, including unusual ...
147-297
4.72e-23
Radical SAM superfamily; Radical SAM proteins catalyze diverse reactions, including unusual methylations, isomerization, sulphur insertion, ring formation, anaerobic oxidation and protein radical formation.
Pssm-ID: 427681 [Multi-domain] Cd Length: 159 Bit Score: 95.67 E-value: 4.72e-23
Radical SAM superfamily. Enzymes of this family generate radicals by combining a 4Fe-4S ...
145-327
5.02e-20
Radical SAM superfamily. Enzymes of this family generate radicals by combining a 4Fe-4S cluster and S-adenosylmethionine (SAM) in close proximity. They are characterized by a conserved CxxxCxxC motif, which coordinates the conserved iron-sulfur cluster. Mechanistically, they share the transfer of a single electron from the iron-sulfur cluster to SAM, which leads to its reductive cleavage to methionine and a 5'-deoxyadenosyl radical, which, in turn, abstracts a hydrogen from the appropriately positioned carbon atom. Depending on the enzyme, SAM is consumed during this process or it is restored and reused. Radical SAM enzymes catalyze steps in metabolism, DNA repair, the biosynthesis of vitamins and coenzymes, and the biosynthesis of many antibiotics. Examples are biotin synthase (BioB), lipoyl synthase (LipA), pyruvate formate-lyase (PFL), coproporphyrinogen oxidase (HemN), lysine 2,3-aminomutase (LAM), anaerobic ribonucleotide reductase (ARR), and MoaA, an enzyme of the biosynthesis of molybdopterin.
Pssm-ID: 100105 [Multi-domain] Cd Length: 204 Bit Score: 88.54 E-value: 5.02e-20
SynChlorMet cassette radical SAM/SPASM protein ScmF; A biosynthesis cassette found in ...
147-262
9.65e-09
SynChlorMet cassette radical SAM/SPASM protein ScmF; A biosynthesis cassette found in Syntrophobacter fumaroxidans MPOB, Chlorobium limicola DSM 245, Methanocella paludicola SANAE, and delta proteobacterium NaphS2 contains two PqqE-like radical SAM/SPASM domain proteins, a PqqD homolog, and a conserved hypothetical protein. These components suggest modification of a ribosomally produced peptide precursor, but the precursor has not been identified. Of the two PqqE homologs of the cassette, this family is the more distant in sequence.
Pssm-ID: 211974 [Multi-domain] Cd Length: 353 Bit Score: 57.54 E-value: 9.65e-09
Elongator protein 3, MiaB family, Radical SAM; This superfamily contains MoaA, NifB, PqqE, ...
145-252
1.61e-07
Elongator protein 3, MiaB family, Radical SAM; This superfamily contains MoaA, NifB, PqqE, coproporphyrinogen III oxidase, biotin synthase and MiaB families, and includes a representative in the eukaryotic elongator subunit, Elp-3. Some members of the family are methyltransferases.
Pssm-ID: 214792 [Multi-domain] Cd Length: 216 Bit Score: 52.40 E-value: 1.61e-07
Radical SAM superfamily maturase, SkfB/NifB/PqqE family [Cell cycle control, cell division, ...
142-261
1.34e-25
Radical SAM superfamily maturase, SkfB/NifB/PqqE family [Cell cycle control, cell division, chromosome partitioning, Coenzyme transport and metabolism];
Pssm-ID: 440301 [Multi-domain] Cd Length: 159 Bit Score: 103.06 E-value: 1.34e-25
Radical SAM superfamily; Radical SAM proteins catalyze diverse reactions, including unusual ...
147-297
4.72e-23
Radical SAM superfamily; Radical SAM proteins catalyze diverse reactions, including unusual methylations, isomerization, sulphur insertion, ring formation, anaerobic oxidation and protein radical formation.
Pssm-ID: 427681 [Multi-domain] Cd Length: 159 Bit Score: 95.67 E-value: 4.72e-23
Radical SAM superfamily. Enzymes of this family generate radicals by combining a 4Fe-4S ...
145-327
5.02e-20
Radical SAM superfamily. Enzymes of this family generate radicals by combining a 4Fe-4S cluster and S-adenosylmethionine (SAM) in close proximity. They are characterized by a conserved CxxxCxxC motif, which coordinates the conserved iron-sulfur cluster. Mechanistically, they share the transfer of a single electron from the iron-sulfur cluster to SAM, which leads to its reductive cleavage to methionine and a 5'-deoxyadenosyl radical, which, in turn, abstracts a hydrogen from the appropriately positioned carbon atom. Depending on the enzyme, SAM is consumed during this process or it is restored and reused. Radical SAM enzymes catalyze steps in metabolism, DNA repair, the biosynthesis of vitamins and coenzymes, and the biosynthesis of many antibiotics. Examples are biotin synthase (BioB), lipoyl synthase (LipA), pyruvate formate-lyase (PFL), coproporphyrinogen oxidase (HemN), lysine 2,3-aminomutase (LAM), anaerobic ribonucleotide reductase (ARR), and MoaA, an enzyme of the biosynthesis of molybdopterin.
Pssm-ID: 100105 [Multi-domain] Cd Length: 204 Bit Score: 88.54 E-value: 5.02e-20
GTP 3',8-cyclase (molybdenum cofactor biosynthesis protein MoaA) [Coenzyme transport and ...
137-308
6.06e-15
GTP 3',8-cyclase (molybdenum cofactor biosynthesis protein MoaA) [Coenzyme transport and metabolism]; GTP 3',8-cyclase (molybdenum cofactor biosynthesis protein MoaA) is part of the Pathway/BioSystem: Molybdopterin biosynthesis
Pssm-ID: 442141 [Multi-domain] Cd Length: 329 Bit Score: 76.25 E-value: 6.06e-15
SynChlorMet cassette radical SAM/SPASM protein ScmF; A biosynthesis cassette found in ...
147-262
9.65e-09
SynChlorMet cassette radical SAM/SPASM protein ScmF; A biosynthesis cassette found in Syntrophobacter fumaroxidans MPOB, Chlorobium limicola DSM 245, Methanocella paludicola SANAE, and delta proteobacterium NaphS2 contains two PqqE-like radical SAM/SPASM domain proteins, a PqqD homolog, and a conserved hypothetical protein. These components suggest modification of a ribosomally produced peptide precursor, but the precursor has not been identified. Of the two PqqE homologs of the cassette, this family is the more distant in sequence.
Pssm-ID: 211974 [Multi-domain] Cd Length: 353 Bit Score: 57.54 E-value: 9.65e-09
Organic radical activating enzyme NrdG/QueE [Coenzyme transport and metabolism]; Organic ...
151-228
7.31e-08
Organic radical activating enzyme NrdG/QueE [Coenzyme transport and metabolism]; Organic radical activating enzyme NrdG/QueE is part of the Pathway/BioSystem: tRNA modification
Pssm-ID: 440367 [Multi-domain] Cd Length: 205 Bit Score: 53.22 E-value: 7.31e-08
Elongator protein 3, MiaB family, Radical SAM; This superfamily contains MoaA, NifB, PqqE, ...
145-252
1.61e-07
Elongator protein 3, MiaB family, Radical SAM; This superfamily contains MoaA, NifB, PqqE, coproporphyrinogen III oxidase, biotin synthase and MiaB families, and includes a representative in the eukaryotic elongator subunit, Elp-3. Some members of the family are methyltransferases.
Pssm-ID: 214792 [Multi-domain] Cd Length: 216 Bit Score: 52.40 E-value: 1.61e-07
Wyosine [tRNA(Phe)-imidazoG37] synthetase, radical SAM superfamily [Translation, ribosomal ...
149-297
1.47e-06
Wyosine [tRNA(Phe)-imidazoG37] synthetase, radical SAM superfamily [Translation, ribosomal structure and biogenesis]; Wyosine [tRNA(Phe)-imidazoG37] synthetase, radical SAM superfamily is part of the Pathway/BioSystem: tRNA modification
Pssm-ID: 440495 [Multi-domain] Cd Length: 248 Bit Score: 49.80 E-value: 1.47e-06
SynChlorMet cassette radical SAM/SPASM protein ScmE; A biosynthesis cassette found in ...
143-212
7.80e-06
SynChlorMet cassette radical SAM/SPASM protein ScmE; A biosynthesis cassette found in Syntrophobacter fumaroxidans MPOB, Chlorobium limicola DSM 245, Methanocella paludicola SANAE, and delta proteobacterium NaphS2 contains two PqqE-like radical SAM/SPASM domain proteins, a PqqD homolog, and a conserved hypothetical protein. These components suggest modification of a ribosomally produced peptide precursor, but the precursor has not been identified. Of the two PqqE homologs of the cassette, this family is the closer in sequence.
Pssm-ID: 211973 [Multi-domain] Cd Length: 358 Bit Score: 48.31 E-value: 7.80e-06
2-iminoacetate synthase ThiH/Menaquinone biosynthesis enzymes MqnC and MqnE [Coenzyme ...
144-249
1.93e-05
2-iminoacetate synthase ThiH/Menaquinone biosynthesis enzymes MqnC and MqnE [Coenzyme transport and metabolism]; 2-iminoacetate synthase ThiH/Menaquinone biosynthesis enzymes MqnC and MqnE is part of the Pathway/BioSystem: Thiamine biosynthesis
Pssm-ID: 440680 [Multi-domain] Cd Length: 351 Bit Score: 47.05 E-value: 1.93e-05
anaerobic ribonucleoside-triphosphate reductase activating protein; This enzyme is a member of ...
145-256
2.77e-05
anaerobic ribonucleoside-triphosphate reductase activating protein; This enzyme is a member of the radical-SAM family (pfam04055). It is often gene clustered with the class III (anaerobic) ribonucleotide triphosphate reductase (NrdD, TIGR02487) and presumably fulfills the identical function as NrdG, which utilizes S-adenosyl methionine, an iron-sulfur cluster and a reductant (dihydroflavodoxin) to produce a glycine-centered radical in NrdD. [Purines, pyrimidines, nucleosides, and nucleotides, 2'-Deoxyribonucleotide metabolism, Protein fate, Protein modification and repair]
Pssm-ID: 274164 [Multi-domain] Cd Length: 192 Bit Score: 45.05 E-value: 2.77e-05
putative geopeptide radical SAM maturase; This family is the radical SAM/SPASM domain putative ...
135-211
3.28e-03
putative geopeptide radical SAM maturase; This family is the radical SAM/SPASM domain putative peptide maturase for geopeptide, described by model TIGR04229. The SPASM domain (see model TIGR04085) frequently marks peptide-modifying radical SAM enzymes.
Pssm-ID: 275100 [Multi-domain] Cd Length: 428 Bit Score: 40.08 E-value: 3.28e-03
anaerobic sulfatase-maturating enzyme; Members of this protein family are radical SAM family ...
150-204
5.06e-03
anaerobic sulfatase-maturating enzyme; Members of this protein family are radical SAM family enzymes, maturases that prepare the oxygen-sensitive radical required in the active site of anaerobic sulfatases. This maturase role has led to many misleading legacy annotations suggesting that this enzyme maturase is instead a sulfatase regulatory protein. All members of the seed alignment are radical SAM enzymes encoded next to or near an anaerobic sulfatase. Note that a single genome may encode more than one sulfatase/maturase pair. [Protein fate, Protein modification and repair]
Pssm-ID: 188457 [Multi-domain] Cd Length: 363 Bit Score: 39.52 E-value: 5.06e-03
7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase, CofH subunit; This enzyme, together with ...
144-249
5.27e-03
7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase, CofH subunit; This enzyme, together with CofG, complete the biosynthesis of 7,8-didemethyl-8-hydroxy-5-deazariboflavin synthase, the chromophore of coenzyme F420. The chromophore is also used in cyanobacteria DNA photolyases. [Biosynthesis of cofactors, prosthetic groups, and carriers, Other]
Pssm-ID: 132590 [Multi-domain] Cd Length: 343 Bit Score: 39.18 E-value: 5.27e-03
4Fe-4S single cluster domain; This family includes proteins containing domains which bind to ...
151-218
9.71e-03
4Fe-4S single cluster domain; This family includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. The structure of the domain is an alpha-antiparallel beta sandwich.
Pssm-ID: 433138 [Multi-domain] Cd Length: 137 Bit Score: 36.77 E-value: 9.71e-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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