cupin domain-containing protein, part of a functionally diverse superfamily with the active site generally located at the center of a conserved domain forming a beta-barrel fold
RmlC-like cupin superfamily; This superfamily contains proteins similar to the RmlC (dTDP ...
1-293
0e+00
RmlC-like cupin superfamily; This superfamily contains proteins similar to the RmlC (dTDP (deoxythymidine diphosphates)-4-dehydrorhamnose 3,5-epimerase)-like cupins. RmlC is a dTDP-sugar isomerase involved in the synthesis of L-rhamnose, a saccharide required for the virulence of some pathogenic bacteria. Cupins are a functionally diverse superfamily originally discovered based on the highly conserved motif found in germin and germin-like proteins. This conserved motif forms a beta-barrel fold found in all of the cupins, giving rise to the name cupin ('cupa' is the Latin term for small barrel). The active site of members of this superfamily is generally located at the center of a conserved barrel and usually includes a metal ion. The different functional classes in this superfamily include single domain bacterial isomerases and epimerases involved in the modification of cell wall carbohydrates, two domain bicupins such as the desiccation-tolerant seed storage globulins, and multidomain nuclear transcription factors involved in legume root nodulation.
The actual alignment was detected with superfamily member TIGR01015:
Pssm-ID: 477354 Cd Length: 429 Bit Score: 639.88 E-value: 0e+00
Homogentisate 1,2-dioxygenase C-terminal; Homogentisate dioxygenase cleaves the aromatic ring ...
139-293
4.88e-110
Homogentisate 1,2-dioxygenase C-terminal; Homogentisate dioxygenase cleaves the aromatic ring during the metabolic degradation of Phe and Tyr. Homogentisate dioxygenase deficiency causes alkaptonuria. The structure of homogentisate dioxygenase shows that the enzyme forms a hexamer arrangement comprised of a dimer of trimers. The active site iron ion is coordinated near the interface between the trimers. This entry represents the C-terminal active site domain.
Pssm-ID: 461227 [Multi-domain] Cd Length: 153 Bit Score: 315.47 E-value: 4.88e-110
homogentisate 1,2-dioxygenase and related proteins, N-terminal cupin domain; This family ...
1-64
3.47e-42
homogentisate 1,2-dioxygenase and related proteins, N-terminal cupin domain; This family includes homogentisate 1,2-dioxygenase (also known as homogentisate oxygenase, homogentisic acid oxidase, homogentisicase, HGO, HGD, HGDO, or HmgA; EC 1.13.11.5), which is involved in the metabolic degradation of phenylalanine and tyrosine. It catalyzes the crucial aromatic ring opening reaction, utilizing nonheme Fe2+ to incorporate both atoms of molecular oxygen into homogentisate (2,5-dihydroxyphenylacetate) to yield 4-maleylacetoacetate as part of the homogentisate pathway. HGO deficiency caused by critical mutations and polymorphic sites, causes the metabolic disease alkaptonuria (AKU), a rare disorder of autosomal recessive inheritance. Homogentisate accumulation causes insoluble ochronotic pigments to deposit in connective tissues, resulting in degenerative arthritis. These enzymes are found in prokaryotes, eukaryotes, and archaea. Proteins in this family belong to the cupin superfamily with a conserved "jelly roll-like" beta-barrel fold capable of homodimerization.
Pssm-ID: 380404 [Multi-domain] Cd Length: 109 Bit Score: 141.12 E-value: 3.47e-42
Homogentisate 1,2-dioxygenase C-terminal; Homogentisate dioxygenase cleaves the aromatic ring ...
139-293
4.88e-110
Homogentisate 1,2-dioxygenase C-terminal; Homogentisate dioxygenase cleaves the aromatic ring during the metabolic degradation of Phe and Tyr. Homogentisate dioxygenase deficiency causes alkaptonuria. The structure of homogentisate dioxygenase shows that the enzyme forms a hexamer arrangement comprised of a dimer of trimers. The active site iron ion is coordinated near the interface between the trimers. This entry represents the C-terminal active site domain.
Pssm-ID: 461227 [Multi-domain] Cd Length: 153 Bit Score: 315.47 E-value: 4.88e-110
Homogentisate 1,2-dioxygenase N-terminal; Homogentisate dioxygenase cleaves the aromatic ring ...
1-138
6.60e-97
Homogentisate 1,2-dioxygenase N-terminal; Homogentisate dioxygenase cleaves the aromatic ring during the metabolic degradation of Phe and Tyr. Homogentisate dioxygenase deficiency causes alkaptonuria. The structure of homogentisate dioxygenase shows that the enzyme forms a hexamer arrangement comprised of a dimer of trimers. The active site iron ion is coordinated near the interface between the trimers. This entry represents the N-terminal domain which forms a jelly roll of beta-strands.
Pssm-ID: 466659 Cd Length: 271 Bit Score: 286.55 E-value: 6.60e-97
homogentisate 1,2-dioxygenase and related proteins, N-terminal cupin domain; This family ...
1-64
3.47e-42
homogentisate 1,2-dioxygenase and related proteins, N-terminal cupin domain; This family includes homogentisate 1,2-dioxygenase (also known as homogentisate oxygenase, homogentisic acid oxidase, homogentisicase, HGO, HGD, HGDO, or HmgA; EC 1.13.11.5), which is involved in the metabolic degradation of phenylalanine and tyrosine. It catalyzes the crucial aromatic ring opening reaction, utilizing nonheme Fe2+ to incorporate both atoms of molecular oxygen into homogentisate (2,5-dihydroxyphenylacetate) to yield 4-maleylacetoacetate as part of the homogentisate pathway. HGO deficiency caused by critical mutations and polymorphic sites, causes the metabolic disease alkaptonuria (AKU), a rare disorder of autosomal recessive inheritance. Homogentisate accumulation causes insoluble ochronotic pigments to deposit in connective tissues, resulting in degenerative arthritis. These enzymes are found in prokaryotes, eukaryotes, and archaea. Proteins in this family belong to the cupin superfamily with a conserved "jelly roll-like" beta-barrel fold capable of homodimerization.
Pssm-ID: 380404 [Multi-domain] Cd Length: 109 Bit Score: 141.12 E-value: 3.47e-42
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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