aromatic ring-hydroxylating dioxygenase subunit alpha [Streptomyces prunicolor]
Protein Classification
aromatic ring-hydroxylating oxygenase subunit alpha( domain architecture ID 11468605)
aromatic ring-hydroxylating oxygenase subunit alpha is the catalytic component of a complex that catalyzes the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds
List of domain hits
| Name | Accession | Description | Interval | E-value | ||||||
| HcaE | COG4638 | Phenylpropionate dioxygenase or related ring-hydroxylating dioxygenase, large terminal subunit ... |
18-408 | 6.97e-89 | ||||||
Phenylpropionate dioxygenase or related ring-hydroxylating dioxygenase, large terminal subunit [Inorganic ion transport and metabolism, General function prediction only]; : Pssm-ID: 443676 [Multi-domain] Cd Length: 298 Bit Score: 271.47 E-value: 6.97e-89
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| Name | Accession | Description | Interval | E-value | ||||||
| HcaE | COG4638 | Phenylpropionate dioxygenase or related ring-hydroxylating dioxygenase, large terminal subunit ... |
18-408 | 6.97e-89 | ||||||
Phenylpropionate dioxygenase or related ring-hydroxylating dioxygenase, large terminal subunit [Inorganic ion transport and metabolism, General function prediction only]; Pssm-ID: 443676 [Multi-domain] Cd Length: 298 Bit Score: 271.47 E-value: 6.97e-89
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| RHO_alpha_C_GbcA-like | cd08884 | C-terminal catalytic domain of GbcA (glycine betaine catabolism A) from Pseudomonas aeruginosa ... |
172-409 | 3.24e-86 | ||||||
C-terminal catalytic domain of GbcA (glycine betaine catabolism A) from Pseudomonas aeruginosa PAO1 and related aromatic ring hydroxylating dioxygenases; C-terminal catalytic domain of GbcA (glycine betaine catabolism A) from Pseudomonas aeruginosa PAO1 and related Rieske-type non-heme iron aromatic ring-hydroxylating oxygenases (RHOs, also known as aromatic ring hydroxylating dioxygenases). RHOs utilize non-heme Fe(II) to catalyze the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds. RHOs are composed of either two or three protein components, and are comprised of an electron transport chain (ETC) and an oxygenase. The ETC transfers reducing equivalents from the electron donor to the oxygenase component, which in turn transfers electrons to the oxygen molecules. The oxygenase components are oligomers, either (alpha)n or (alpha)n(beta)n. The alpha subunits are the catalytic components and have an N-terminal domain, which binds a Rieske-like 2Fe-2S cluster, and a C-terminal domain which binds the non-heme Fe(II). The Fe(II) is co-ordinated by conserved His and Asp residues. GbcA is involved in glycine betaine (GB) catabolism in Pseudomonas aeruginosa; it may remove a methyl group from GB via a dioxygenase mechanism, producing dimethylglycine and formaldehyde. This subfamily belongs to the SRPBCC (START/RHO_alpha_C/PITP/Bet_v1/CoxG/CalC) domain superfamily of proteins that bind hydrophobic ligands. SRPBCC domains have a deep hydrophobic ligand-binding pocket. Pssm-ID: 176893 Cd Length: 205 Bit Score: 261.05 E-value: 3.24e-86
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| Ring_hydroxyl_A | pfam00848 | Ring hydroxylating alpha subunit (catalytic domain); This family is the catalytic domain of ... |
176-411 | 2.17e-41 | ||||||
Ring hydroxylating alpha subunit (catalytic domain); This family is the catalytic domain of aromatic-ring- hydroxylating dioxygenase systems. The active site contains a non-heme ferrous ion coordinated by three ligands. Pssm-ID: 425905 Cd Length: 210 Bit Score: 145.68 E-value: 2.17e-41
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| Name | Accession | Description | Interval | E-value | ||||||
| HcaE | COG4638 | Phenylpropionate dioxygenase or related ring-hydroxylating dioxygenase, large terminal subunit ... |
18-408 | 6.97e-89 | ||||||
Phenylpropionate dioxygenase or related ring-hydroxylating dioxygenase, large terminal subunit [Inorganic ion transport and metabolism, General function prediction only]; Pssm-ID: 443676 [Multi-domain] Cd Length: 298 Bit Score: 271.47 E-value: 6.97e-89
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| RHO_alpha_C_GbcA-like | cd08884 | C-terminal catalytic domain of GbcA (glycine betaine catabolism A) from Pseudomonas aeruginosa ... |
172-409 | 3.24e-86 | ||||||
C-terminal catalytic domain of GbcA (glycine betaine catabolism A) from Pseudomonas aeruginosa PAO1 and related aromatic ring hydroxylating dioxygenases; C-terminal catalytic domain of GbcA (glycine betaine catabolism A) from Pseudomonas aeruginosa PAO1 and related Rieske-type non-heme iron aromatic ring-hydroxylating oxygenases (RHOs, also known as aromatic ring hydroxylating dioxygenases). RHOs utilize non-heme Fe(II) to catalyze the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds. RHOs are composed of either two or three protein components, and are comprised of an electron transport chain (ETC) and an oxygenase. The ETC transfers reducing equivalents from the electron donor to the oxygenase component, which in turn transfers electrons to the oxygen molecules. The oxygenase components are oligomers, either (alpha)n or (alpha)n(beta)n. The alpha subunits are the catalytic components and have an N-terminal domain, which binds a Rieske-like 2Fe-2S cluster, and a C-terminal domain which binds the non-heme Fe(II). The Fe(II) is co-ordinated by conserved His and Asp residues. GbcA is involved in glycine betaine (GB) catabolism in Pseudomonas aeruginosa; it may remove a methyl group from GB via a dioxygenase mechanism, producing dimethylglycine and formaldehyde. This subfamily belongs to the SRPBCC (START/RHO_alpha_C/PITP/Bet_v1/CoxG/CalC) domain superfamily of proteins that bind hydrophobic ligands. SRPBCC domains have a deep hydrophobic ligand-binding pocket. Pssm-ID: 176893 Cd Length: 205 Bit Score: 261.05 E-value: 3.24e-86
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| Rieske_RO_Alpha_N | cd03469 | Rieske non-heme iron oxygenase (RO) family, N-terminal Rieske domain of the oxygenase alpha ... |
44-159 | 6.77e-50 | ||||||
Rieske non-heme iron oxygenase (RO) family, N-terminal Rieske domain of the oxygenase alpha subunit; The RO family comprise a large class of aromatic ring-hydroxylating dioxygenases found predominantly in microorganisms. These enzymes enable microorganisms to tolerate and even exclusively utilize aromatic compounds for growth. ROs consist of two or three components: reductase, oxygenase, and ferredoxin (in some cases) components. The oxygenase component may contain alpha and beta subunits, with the beta subunit having a purely structural function. Some oxygenase components contain only an alpha subunit. The oxygenase alpha subunit has two domains, an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from the reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. Reduced pyridine nucleotide is used as the initial source of two electrons for dioxygen activation. Pssm-ID: 239551 [Multi-domain] Cd Length: 118 Bit Score: 164.68 E-value: 6.77e-50
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| Ring_hydroxyl_A | pfam00848 | Ring hydroxylating alpha subunit (catalytic domain); This family is the catalytic domain of ... |
176-411 | 2.17e-41 | ||||||
Ring hydroxylating alpha subunit (catalytic domain); This family is the catalytic domain of aromatic-ring- hydroxylating dioxygenase systems. The active site contains a non-heme ferrous ion coordinated by three ligands. Pssm-ID: 425905 Cd Length: 210 Bit Score: 145.68 E-value: 2.17e-41
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| Rieske_RO_Alpha_NDO | cd03535 | Rieske non-heme iron oxygenase (RO) family, Nathphalene 1,2-dioxygenase (NDO) subfamily, ... |
42-157 | 1.14e-29 | ||||||
Rieske non-heme iron oxygenase (RO) family, Nathphalene 1,2-dioxygenase (NDO) subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. NDO is a three-component RO system consisting of a reductase, a ferredoxin, and a hetero-hexameric alpha-beta subunit oxygenase component. NDO catalyzes the oxidation of naphthalene to cis-(1R,2S)-dihydroxy-1,2-dihydronaphthalene (naphthalene cis-dihydrodiol) with the consumption of O2 and NAD(P)H. NDO has a relaxed substrate specificity and can oxidize almost 100 substrates. Included in its varied activities are the enantiospecific cis-dihydroxylation of polycyclic aromatic hydrocarbons and benzocycloalkenes, benzylic hydroxylation, N- and O-dealkylation, sulfoxidation and desaturation reactions. Pssm-ID: 239609 [Multi-domain] Cd Length: 123 Bit Score: 111.37 E-value: 1.14e-29
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| Rieske_RO_Alpha_AntDO | cd03538 | Rieske non-heme iron oxygenase (RO) family, Anthranilate 1,2-dioxygenase (AntDO) subfamily, ... |
26-157 | 1.64e-26 | ||||||
Rieske non-heme iron oxygenase (RO) family, Anthranilate 1,2-dioxygenase (AntDO) subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. AntDO converts anthranilate to catechol, a naturally occurring compound formed through tryptophan degradation and an important intermediate in the metabolism of many N-heterocyclic compounds such as indole, o-nitrobenzoate, carbazole, and quinaldine. Pssm-ID: 239612 [Multi-domain] Cd Length: 146 Bit Score: 103.70 E-value: 1.64e-26
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| Rieske_RO_Alpha_OHBDO_like | cd03545 | Rieske non-heme iron oxygenase (RO) family, Ortho-halobenzoate-1,2-dioxygenase (OHBDO)-like ... |
26-157 | 1.36e-25 | ||||||
Rieske non-heme iron oxygenase (RO) family, Ortho-halobenzoate-1,2-dioxygenase (OHBDO)-like subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; composed of the oxygenase alpha subunits of OHBDO, salicylate 5-hydroxylase (S5H), terephthalate 1,2-dioxygenase system (TERDOS) and similar proteins. ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. OHBDO converts 2-chlorobenzoate (2-CBA) to catechol as well as 2,4-dCBA and 2,5-dCBA to 4-chlorocatechol, as part of the chlorobenzoate degradation pathway. Although ortho-substituted chlorobenzoates appear to be particularly recalcitrant to biodegradation, several strains utilize 2-CBA and the dCBA derivatives as a sole carbon and energy source. S5H converts salicylate (2-hydroxybenzoate), a metabolic intermediate of phenanthrene, to gentisate (2,5-dihydroxybenzoate) as part of an alternate pathway for naphthalene catabolism. S5H is a multicomponent enzyme made up of NagGH (the oxygenase components), NagAa (the ferredoxin reductase component), and NagAb (the ferredoxin component). The oxygenase component is made up of alpha (NagG) and beta (NagH) subunits. TERDOS is present in gram-positive bacteria and proteobacteria where it converts terephthalate (1,4-dicarboxybenzene) to protocatechuate as part of the terephthalate degradation pathway. The oxygenase component of TERDOS, called TerZ, is a hetero-hexamer with 3 alpha (TerZalpha) and 3 beta (TerZbeta) subunits. Pssm-ID: 239616 [Multi-domain] Cd Length: 150 Bit Score: 101.37 E-value: 1.36e-25
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| RHO_alpha_C | cd00680 | C-terminal catalytic domain of the oxygenase alpha subunit of Rieske-type non-heme iron ... |
187-409 | 1.41e-24 | ||||||
C-terminal catalytic domain of the oxygenase alpha subunit of Rieske-type non-heme iron aromatic ring-hydroxylating oxygenases; C-terminal catalytic domain of the oxygenase alpha subunit of Rieske-type non-heme iron aromatic ring-hydroxylating oxygenase (RHO) family. RHOs, also known as aromatic ring hydroxylating dioxygenases, utilize non-heme Fe(II) to catalyze the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds. RHOs are composed of either two or three protein components, and are comprised of an electron transport chain (ETC), and an oxygenase. The ETC transfers reducing equivalents from the electron donor to the oxygenase component, which in turn transfers electrons to the oxygen molecules. The oxygenase components are oligomers, either (alpha)n or (alpha)n(beta)n. The alpha subunits are the catalytic components and have an N-terminal domain, which binds a Rieske-like 2Fe-2S cluster, and a C-terminal domain which binds the non-heme Fe(II). The Fe(II) is co-ordinated by conserved His and Asp residues. Oxygenases belonging to this family include the alpha subunits of Pseudomonas resinovorans strain CA10 anthranilate 1,2-dioxygenase, Stenotrophomonas maltophilia dicamba O-demethylase, Ralstonia sp. U2 salicylate-5-hydroxylase, Cycloclasticus sp. strain A5 polycyclic aromatic hydrocarbon dioxygenase, toluene 2,3-dioxygenase from Pseudomonas putida F1, dioxin dioxygenase of Sphingomonas sp. Strain RW1, plant choline monooxygenase, and the polycyclic aromatic hydrocarbon (PAH)-degrading ring-hydroxylating dioxygenase from Sphingomonas CHY-1. This group also includes the C-terminal catalytic domains of MupW, part of the mupirocin biosynthetic gene cluster in Pseudomonas fluorescens, and Pseudomonas aeruginosa GbcA (glycine betaine catabolism A). This family belongs to the SRPBCC (START/RHO_alpha_C/PITP/Bet_v1/CoxG/CalC) domain superfamily of proteins that bind hydrophobic ligands. SRPBCC domains have a deep hydrophobic ligand-binding pocket. Pssm-ID: 176852 [Multi-domain] Cd Length: 188 Bit Score: 99.95 E-value: 1.41e-24
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| Rieske_RO_Alpha_BPDO_like | cd03472 | Rieske non-heme iron oxygenase (RO) family, Biphenyl dioxygenase (BPDO)-like subfamily, ... |
36-158 | 4.82e-23 | ||||||
Rieske non-heme iron oxygenase (RO) family, Biphenyl dioxygenase (BPDO)-like subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; composed of the oxygenase alpha subunits of BPDO and similar proteins including cumene dioxygenase (CumDO), nitrobenzene dioxygenase (NBDO), alkylbenzene dioxygenase (AkbDO) and dibenzofuran 4,4a-dioxygenase (DFDO). ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. BPDO degrades biphenyls and polychlorinated biphenyls (PCB's) while CumDO degrades cumene (isopropylbenzene), an aromatic hydrocarbon that is intermediate in size between ethylbenzene and biphenyl. NBDO catalyzes the initial reaction in nitrobenzene degradation, oxidizing the aromatic rings of mono- and dinitrotoluenes to form catechol and nitrite. NBDO belongs to the naphthalene subfamily of ROs. AkbDO is involved in alkylbenzene catabolism, converting o-xylene to 2,3- and 3,4-dimethylphenol and ethylbenzene to cis-dihydrodiol. DFDO is involved in dibenzofuran degradation. Pssm-ID: 239554 [Multi-domain] Cd Length: 128 Bit Score: 93.75 E-value: 4.82e-23
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| Rieske_RO_Alpha_S5H | cd03539 | This alignment model represents the N-terminal rieske iron-sulfur domain of the oxygenase ... |
44-149 | 4.41e-20 | ||||||
This alignment model represents the N-terminal rieske iron-sulfur domain of the oxygenase alpha subunit (NagG) of salicylate 5-hydroxylase (S5H). S5H converts salicylate (2-hydroxybenzoate), a metabolic intermediate of phenanthrene, to gentisate (2,5-dihydroxybenzoate) as part of an alternate pathway for naphthalene catabolism. S5H is a multicomponent enzyme made up of NagGH (the oxygenase components), NagAa (the ferredoxin reductase component), and NagAb (the ferredoxin component). The oxygenase component is made up of alpha (NagG) and beta (NagH) subunits. Pssm-ID: 239613 [Multi-domain] Cd Length: 129 Bit Score: 85.37 E-value: 4.41e-20
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| Rieske_RO_Alpha_HBDO | cd03542 | Rieske non-heme iron oxygenase (RO) family, 2-Halobenzoate 1,2-dioxygenase (HBDO) subfamily, ... |
44-140 | 1.28e-19 | ||||||
Rieske non-heme iron oxygenase (RO) family, 2-Halobenzoate 1,2-dioxygenase (HBDO) subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. HBDO catalyzes the double hydroxylation of 2-halobenzoates with concomitant release of halogenide and carbon dioxide, yielding catechol. Pssm-ID: 239615 [Multi-domain] Cd Length: 123 Bit Score: 84.03 E-value: 1.28e-19
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| Rieske_RO_Alpha_CMO | cd03541 | Rieske non-heme iron oxygenase (RO) family, Choline monooxygenase (CMO) subfamily, N-terminal ... |
44-136 | 3.72e-19 | ||||||
Rieske non-heme iron oxygenase (RO) family, Choline monooxygenase (CMO) subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. CMO is a novel RO found in certain plants which catalyzes the first step in betaine synthesis. CMO is not found in animals or bacteria. In these organisms, the first step in betaine synthesis is catalyzed by either the membrane-bound choline dehydrogenase (CDH) or the soluble choline oxidase (COX). Pssm-ID: 239614 [Multi-domain] Cd Length: 118 Bit Score: 82.60 E-value: 3.72e-19
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| Rieske_RO_Alpha_DTDO | cd03536 | This alignment model represents the N-terminal rieske domain of the oxygenase alpha subunit ... |
44-149 | 6.75e-18 | ||||||
This alignment model represents the N-terminal rieske domain of the oxygenase alpha subunit (DitA) of diterpenoid dioxygenase (DTDO). DTDO is a novel aromatic-ring-hydroxylating dioxygenase found in Pseudomonas and other proteobacteria that degrades dehydroabietic acid (DhA). Specifically, DitA hydroxylates 7-oxodehydroabietic acid to 7-oxo-11,12-dihydroxy-8, 13-abietadien acid. The ditA1 and ditA2 genes encode the alpha and beta subunits of the oxygenase component of DTDO while the ditA3 gene encodes the ferredoxin component of DTDO. The organization of the genes encoding the various diterpenoid dioxygenase components, the phylogenetic distinctiveness of both the alpha subunit and the ferredoxin component, and the unusual iron-sulfur cluster of the ferredoxin all suggest that this enzyme belongs to a new class of aromatic ring-hydroxylating dioxygenases. Pssm-ID: 239610 [Multi-domain] Cd Length: 123 Bit Score: 79.21 E-value: 6.75e-18
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| Rieske | pfam00355 | Rieske [2Fe-2S] domain; The rieske domain has a [2Fe-2S] centre. Two conserved cysteines ... |
43-126 | 8.58e-18 | ||||||
Rieske [2Fe-2S] domain; The rieske domain has a [2Fe-2S] centre. Two conserved cysteines coordinate one Fe ion, while the other Fe ion is coordinated by two conserved histidines. In hyperthermophilic archaea there is a SKTPCX(2-3)C motif at the C-terminus. The cysteines in this motif form a disulphide bridge, which stabilizes the protein. Pssm-ID: 425632 [Multi-domain] Cd Length: 89 Bit Score: 77.77 E-value: 8.58e-18
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| RHO_alpha_C_1 | cd08885 | C-terminal catalytic domain of the oxygenase alpha subunit of an uncharacterized subgroup of ... |
192-410 | 1.58e-13 | ||||||
C-terminal catalytic domain of the oxygenase alpha subunit of an uncharacterized subgroup of Rieske-type non-heme iron aromatic ring-hydroxylating oxygenases; C-terminal catalytic domain of the oxygenase alpha subunit of a functionally uncharacterized subgroup of the Rieske-type non-heme iron aromatic ring-hydroxylating oxygenase (RHO) family. RHOs, also known as aromatic ring hydroxylating dioxygenases, utilize non-heme Fe(II) to catalyze the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds. RHOs are composed of either two or three protein components, and are comprised of an electron transport chain (ETC) and an oxygenase. The ETC transfers reducing equivalents from the electron donor to the oxygenase component, which in turn transfers electrons to the oxygen molecules. The oxygenase components are oligomers, either (alpha)n or (alpha)n(beta)n. The alpha subunits are the catalytic components and have an N-terminal domain, which binds a Rieske-like 2Fe-2S cluster, and a C-terminal domain which binds the non-heme Fe(II). The Fe(II) is co-ordinated by conserved His and Asp residues. This group contains two putative Parvibaculum lavamentivorans (T) DS-1 oxygenases; this organism catabolizes commercial linear alkylbenzenesulfonate surfactant (LAS) and other surfactants, by a pathway involving an undefined 'omega-oxygenation' and beta-oxidation of the LAS side chain. The nature of the LAS-oxygenase is unknown but is likely a multicomponent system. This subfamily belongs to the SRPBCC (START/RHO_alpha_C/PITP/Bet_v1/CoxG/CalC) domain superfamily of proteins that bind hydrophobic ligands. SRPBCC domains have a deep hydrophobic ligand-binding pocket. Pssm-ID: 176894 Cd Length: 190 Bit Score: 68.56 E-value: 1.58e-13
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| Rieske | cd03467 | Rieske domain; a [2Fe-2S] cluster binding domain commonly found in Rieske non-heme iron ... |
44-121 | 7.31e-13 | ||||||
Rieske domain; a [2Fe-2S] cluster binding domain commonly found in Rieske non-heme iron oxygenase (RO) systems such as naphthalene and biphenyl dioxygenases, as well as in plant/cyanobacterial chloroplast b6f and mitochondrial cytochrome bc(1) complexes. The Rieske domain can be divided into two subdomains, with an incomplete six-stranded, antiparallel beta-barrel at one end, and an iron-sulfur cluster binding subdomain at the other. The Rieske iron-sulfur center contains a [2Fe-2S] cluster, which is involved in electron transfer, and is liganded to two histidine and two cysteine residues present in conserved sequences called Rieske motifs. In RO systems, the N-terminal Rieske domain of the alpha subunit acts as an electron shuttle that accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron in the alpha subunit C-terminal domain to be used for catalysis. Pssm-ID: 239550 [Multi-domain] Cd Length: 98 Bit Score: 64.05 E-value: 7.31e-13
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| NirD | COG2146 | Ferredoxin subunit of nitrite reductase or a ring-hydroxylating dioxygenase [Inorganic ion ... |
43-154 | 6.40e-12 | ||||||
Ferredoxin subunit of nitrite reductase or a ring-hydroxylating dioxygenase [Inorganic ion transport and metabolism, Secondary metabolites biosynthesis, transport and catabolism]; Pssm-ID: 441749 [Multi-domain] Cd Length: 103 Bit Score: 61.78 E-value: 6.40e-12
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| Rieske_RO_Alpha_PhDO_like | cd03479 | Rieske non-heme iron oxygenase (RO) family, Phthalate 4,5-dioxygenase (PhDO)-like subfamily, ... |
42-158 | 4.90e-09 | ||||||
Rieske non-heme iron oxygenase (RO) family, Phthalate 4,5-dioxygenase (PhDO)-like subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; composed of the oxygenase alpha subunits of PhDO and similar proteins including 3-chlorobenzoate 3,4-dioxygenase (CBDO), phenoxybenzoate dioxygenase (POB-dioxygenase) and 3-nitrobenzoate oxygenase (MnbA). ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. PhDO and CBDO are two-component RO systems, containing oxygenase and reductase components. PhDO catalyzes the dihydroxylation of phthalate to form the 4,5-dihydro-cis-dihydrodiol of phthalate (DHD). CBDO, together with CbaC dehydrogenase, converts the environmental pollutant 3CBA to protocatechuate (PCA) and 5-Cl-PCA, which are then metabolized by the chromosomal PCA meta (extradiol) ring fission pathway. POB-dioxygenase catalyzes the initial catabolic step in the angular dioxygenation of phenoxybenzoate, converting mono- and dichlorinated phenoxybenzoates to protocatechuate and chlorophenols. These phenoxybenzoates are metabolic products formed during the degradation of pyrethroid insecticides. Pssm-ID: 239561 [Multi-domain] Cd Length: 144 Bit Score: 54.56 E-value: 4.90e-09
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| RHO_alpha_C_3 | cd08887 | C-terminal catalytic domain of the oxygenase alpha subunit of an uncharacterized subgroup of ... |
187-385 | 8.76e-06 | ||||||
C-terminal catalytic domain of the oxygenase alpha subunit of an uncharacterized subgroup of Rieske-type non-heme iron aromatic ring-hydroxylating oxygenases; C-terminal catalytic domain of the oxygenase alpha subunit of a functionally uncharacterized subgroup of the Rieske-type non-heme iron aromatic ring-hydroxylating oxygenase (RHO) family. RHOs, also known as aromatic ring hydroxylating dioxygenases, utilize non-heme Fe(II) to catalyze the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds. RHOs are composed of either two or three protein components, and are comprised of an electron transport chain (ETC) and an oxygenase. The ETC transfers reducing equivalents from the electron donor to the oxygenase component, which in turn transfers electrons to the oxygen molecules. The oxygenase components are oligomers, either (alpha)n or (alpha)n(beta)n. The alpha subunits are the catalytic components and have an N-terminal domain, which binds a Rieske-like 2Fe-2S cluster, and a C-terminal domain which binds the non-heme Fe(II). The Fe(II) is co-ordinated by conserved His and Asp residues. This group contains a putative Parvibaculum lavamentivorans (T) DS-1 oxygenase; this organism catabolizes commercial linear alkylbenzenesulfonate surfactant (LAS) and other surfactants, by a pathway involving an undefined 'omega-oxygenation' and beta-oxidation of the LAS side chain. The nature of the LAS-oxygenase is unknown but is likely a multicomponent system. This subfamily belongs to the SRPBCC (START/RHO_alpha_C/PITP/Bet_v1/CoxG/CalC) domain superfamily of proteins that bind hydrophobic ligands. SRPBCC domains have a deep hydrophobic ligand-binding pocket. Pssm-ID: 176896 Cd Length: 185 Bit Score: 46.15 E-value: 8.76e-06
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| Rieske_T4moC | cd03474 | Toluene-4-monooxygenase effector protein complex (T4mo), Rieske ferredoxin subunit; The Rieske ... |
44-161 | 9.39e-06 | ||||||
Toluene-4-monooxygenase effector protein complex (T4mo), Rieske ferredoxin subunit; The Rieske domain is a [2Fe-2S] cluster binding domain involved in electron transfer. T4mo is a four-protein complex that catalyzes the NADH- and O2-dependent hydroxylation of toluene to form p-cresol. T4mo consists of an NADH oxidoreductase (T4moF), a diiron hydroxylase (T4moH), a catalytic effector protein (T4moD), and a Rieske ferredoxin (T4moC). T4moC contains a Rieske domain and functions as an obligate electron carrier between T4moF and T4moH. Rieske ferredoxins are found as subunits of membrane oxidase complexes, cis-dihydrodiol-forming aromatic dioxygenases, bacterial assimilatory nitrite reductases, and arsenite oxidase. Rieske ferredoxins are also found as soluble electron carriers in bacterial dioxygenase and monooxygenase complexes. Pssm-ID: 239556 [Multi-domain] Cd Length: 108 Bit Score: 44.25 E-value: 9.39e-06
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| Rieske_RO_Alpha_OMO_CARDO | cd03548 | Rieske non-heme iron oxygenase (RO) family, 2-Oxoquinoline 8-monooxygenase (OMO) and Carbazole ... |
40-159 | 3.67e-04 | ||||||
Rieske non-heme iron oxygenase (RO) family, 2-Oxoquinoline 8-monooxygenase (OMO) and Carbazole 1,9a-dioxygenase (CARDO) subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. OMO catalyzes the NADH-dependent oxidation of the N-heterocyclic aromatic compound 2-oxoquinoline to 8-hydroxy-2-oxoquinoline, the second step in the bacterial degradation of quinoline. OMO consists of a reductase component (OMR) and an oxygenase component (OMO) that together function to shuttle electrons from the reduced pyridine nucleotide to the active site of OMO, where O2 activation and 2-oxoquinoline hydroxylation occurs. CARDO, which contains oxygenase (CARDO-O), ferredoxin (CARDO-F) and ferredoxin reductase (CARDO-R) components, catalyzes the dihydroxylation at the C1 and C9a positions of carbazole. The oxygenase component of OMO and CARDO contain only alpha subunits arranged in a trimeric structure. Pssm-ID: 239617 [Multi-domain] Cd Length: 136 Bit Score: 40.48 E-value: 3.67e-04
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| Rieske_RO_Alpha_Cao | cd04337 | Cao (chlorophyll a oxygenase) is a rieske non-heme iron-sulfur protein located within the ... |
34-159 | 6.20e-04 | ||||||
Cao (chlorophyll a oxygenase) is a rieske non-heme iron-sulfur protein located within the plastid-envelope inner and thylakoid membranes, that catalyzes the conversion of chlorophyllide a to chlorophyllide b. CAO is found not only in plants but also in chlorophytes and prochlorophytes. This domain represents the N-terminal rieske domain of the oxygenase alpha subunit. ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. Cao is closely related to several other plant RO's including Tic 55, a 55 kDa protein associated with protein transport through the inner chloroplast membrane; Ptc 52, a novel 52 kDa protein isolated from chloroplasts; and LLS1/Pao (Lethal-leaf spot 1/pheophorbide a oxygenase). Pssm-ID: 239829 [Multi-domain] Cd Length: 129 Bit Score: 39.78 E-value: 6.20e-04
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| Rieske_RO_Alpha_VanA_DdmC | cd03532 | Rieske non-heme iron oxygenase (RO) family, Vanillate-O-demethylase oxygenase (VanA) and ... |
68-125 | 8.84e-04 | ||||||
Rieske non-heme iron oxygenase (RO) family, Vanillate-O-demethylase oxygenase (VanA) and dicamba O-demethylase oxygenase (DdmC) subfamily, N-terminal Rieske domain of the oxygenase alpha subunit; ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. Vanillate-O-demethylase is a heterodimeric enzyme consisting of a terminal oxygenase (VanA) and reductase (VanB) components. This enzyme reductively catalyzes the conversion of vanillate into protocatechuate and formaldehyde. Protocatechuate and vanillate are important intermediate metabolites in the degradation pathway of lignin-derived compounds such as ferulic acid and vanillin by soil microbes. DDmC is the oxygenase component of a three-component dicamba O-demethylase found in Pseudomonas maltophila, that catalyzes the conversion of a widely used herbicide called herbicide dicamba (2-methoxy-3,6-dichlorobenzoic acid) to DCSA (3,6-dichlorosalicylic acid). Pssm-ID: 239608 [Multi-domain] Cd Length: 116 Bit Score: 38.89 E-value: 8.84e-04
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| Rieske_RO_Alpha_Tic55 | cd04338 | Tic55 is a 55kDa LLS1-related non-heme iron oxygenase associated with protein transport ... |
43-120 | 1.11e-03 | ||||||
Tic55 is a 55kDa LLS1-related non-heme iron oxygenase associated with protein transport through the plant inner chloroplast membrane. This domain represents the N-terminal Rieske domain of the Tic55 oxygenase alpha subunit. Tic55 is closely related to the oxygenase alpha subunits of a small subfamily of enzymes found in plants as well as oxygenic cyanobacterial photosynthesizers including LLS1 (lethal leaf spot 1, also known as PaO), Ptc52, and ACD1 (accelerated cell death 1). ROs comprise a large class of aromatic ring-hydroxylating dioxygenases that enable microorganisms to tolerate and utilize aromatic compounds for growth. The oxygenase alpha subunit contains an N-terminal Rieske domain with an [2Fe-2S] cluster and a C-terminal catalytic domain with a mononuclear Fe(II) binding site. The Rieske [2Fe-2S] cluster accepts electrons from a reductase or ferredoxin component and transfers them to the mononuclear iron for catalysis. Pssm-ID: 239830 [Multi-domain] Cd Length: 134 Bit Score: 39.05 E-value: 1.11e-03
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| RHO_alpha_C_CMO-like | cd08883 | C-terminal catalytic domain of plant choline monooxygenase (CMO) and related aromatic ring ... |
310-397 | 1.49e-03 | ||||||
C-terminal catalytic domain of plant choline monooxygenase (CMO) and related aromatic ring hydroxylating dioxygenases; C-terminal catalytic domain of plant choline monooxygenase and related Rieske-type non-heme iron aromatic ring-hydroxylating oxygenases (RHOs, also known as aromatic ring hydroxylating dioxygenases). RHOs utilize non-heme Fe(II) to catalyze the addition of hydroxyl groups to the aromatic ring, an initial step in the oxidative degradation of aromatic compounds. RHOs are composed of either two or three protein components, and are comprised of an electron transport chain (ETC) and an oxygenase. The ETC transfers reducing equivalents from the electron donor to the oxygenase component, which in turn transfers electrons to the oxygen molecules. The oxygenase components are oligomers, either (alpha)n or (alpha)n(beta)n. The alpha subunits are the catalytic components and have an N-terminal domain, which binds a Rieske-like 2Fe-2S cluster, and a C-terminal domain which binds the non-heme Fe(II). The Fe(II) is co-ordinated by conserved His and Asp residues. Plant choline monooxygenase catalyzes the first step in a two-step oxidation of choline to the osmoprotectant glycine betaine. This subfamily belongs to the SRPBCC (START/RHO_alpha_C/PITP/Bet_v1/CoxG/CalC) domain superfamily of proteins that bind hydrophobic ligands. SRPBCC domains have a deep hydrophobic ligand-binding pocket. Pssm-ID: 176892 Cd Length: 175 Bit Score: 39.25 E-value: 1.49e-03
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| Rieske_RO_ferredoxin | cd03528 | Rieske non-heme iron oxygenase (RO) family, Rieske ferredoxin component; composed of the ... |
44-93 | 3.80e-03 | ||||||
Rieske non-heme iron oxygenase (RO) family, Rieske ferredoxin component; composed of the Rieske ferredoxin component of some three-component RO systems including biphenyl dioxygenase (BPDO) and carbazole 1,9a-dioxygenase (CARDO). The RO family comprise a large class of aromatic ring-hydroxylating dioxygenases found predominantly in microorganisms. These enzymes enable microorganisms to tolerate and even exclusively utilize aromatic compounds for growth. ROs consist of two or three components: reductase, oxygenase, and ferredoxin (in some cases) components. The ferredoxin component contains either a plant-type or Rieske-type [2Fe-2S] cluster. The Rieske ferredoxin component in this family carries an electron from the RO reductase component to the terminal RO oxygenase component. BPDO degrades biphenyls and polychlorinated biphenyls. BPDO ferredoxin (BphF) has structural features consistent with a minimal and perhaps archetypical Rieske protein in that the insertions that give other Rieske proteins unique structural features are missing. CARDO catalyzes dihydroxylation at the C1 and C9a positions of carbazole. Rieske ferredoxins are found as subunits of membrane oxidase complexes, cis-dihydrodiol-forming aromatic dioxygenases, bacterial assimilatory nitrite reductases, and arsenite oxidase. Rieske ferredoxins are also found as soluble electron carriers in bacterial dioxygenase and monooxygenase complexes. Pssm-ID: 239604 [Multi-domain] Cd Length: 98 Bit Score: 36.70 E-value: 3.80e-03
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| Rieske_RO_Alpha_KSH | cd03531 | The alignment model represents the N-terminal rieske iron-sulfur domain of KshA, the oxygenase ... |
68-118 | 4.30e-03 | ||||||
The alignment model represents the N-terminal rieske iron-sulfur domain of KshA, the oxygenase component of 3-ketosteroid 9-alpha-hydroxylase (KSH). The terminal oxygenase component of KSH is a key enzyme in the microbial steroid degradation pathway, catalyzing the 9 alpha-hydroxylation of 4-androstene-3,17-dione (AD) and 1,4-androstadiene-3,17-dione (ADD). KSH is a two-component class IA monooxygenase, with terminal oxygenase (KshA) and oxygenase reductase (KshB) components. KSH activity has been found in many actino- and proteo- bacterial genera including Rhodococcus, Nocardia, Arthrobacter, Mycobacterium, and Burkholderia. Pssm-ID: 239607 [Multi-domain] Cd Length: 115 Bit Score: 37.01 E-value: 4.30e-03
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| Rieske_NirD_small_Bacillus | cd03530 | Small subunit of nitrite reductase (NirD) family, Rieske domain; composed of proteins similar ... |
44-151 | 5.08e-03 | ||||||
Small subunit of nitrite reductase (NirD) family, Rieske domain; composed of proteins similar to the Bacillus subtilis small subunit of assimilatory nitrite reductase containing a Rieske domain. The Rieske domain is a [2Fe-2S] cluster binding domain involved in electron transfer. Assimilatory nitrate and nitrite reductases convert nitrate through nitrite to ammonium. Pssm-ID: 239606 [Multi-domain] Cd Length: 98 Bit Score: 36.04 E-value: 5.08e-03
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