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Enzyme Nomenclature
Information on EC 1.1.1.193 - 5-amino-6-(5-phosphoribosylamino)uracil reductase
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The enzyme appears in viruses and cellular organisms
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EC NUMBER 
COMMENTARY 
1.1.1.193
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RECOMMENDED NAME
GeneOntology No.
5-amino-6-(5-phosphoribosylamino)uracil reductase
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
5-amino-6-(5-phospho-D-ribitylamino)uracil + NADP+ = 5-amino-6-(5-phospho-D-ribosylamino)uracil + NADPH + H+
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
oxidation
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redox reaction
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reduction
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PATHWAY
BRENDA Link
KEGG Link
MetaCyc Link
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SYSTEMATIC NAME
IUBMB Comments
5-amino-6-(5-phospho-D-ribitylamino)uracil:NADP+ 1'-oxidoreductase
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CAS REGISTRY NUMBER
COMMENTARY
69020-28-6
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ORGANISM
COMMENTARY
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
5-amino-2,6-dioxy-4-(5'-phosphoribosylamino)pyrimidine + NADPH
5-amino-2,6-dioxy-4-(5'-phosphoribitylamino)pyrimidine + NADP+
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
5-amino-2,6-dioxy-4-(5'-phosphoribosylamino)pyrimidine + NADPH
5-amino-2,6-dioxy-4-(5'-phosphoribitylamino)pyrimidine + NADP+
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intermediate in the biosynthesis of riboflavin
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?
5-amino-2,6-dioxy-4-(5'-phosphoribosylamino)pyrimidine + NADPH
5-amino-2,6-dioxy-4-(5'-phosphoribitylamino)pyrimidine + NADP+
Escherichia coli B / ATCC 11303
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intermediate in the biosynthesis of riboflavin
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?
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
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?
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
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?
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
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?
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
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additional information
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the enzyme is involved in riboflavin biosynthesis, overview
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additional information
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the enzyme is involved in riboflavin biosynthesis, overview
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additional information
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the enzyme is involved in riboflavin biosynthesis, overview
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NATURAL SUBSTRATES
NATURAL PRODUCTS
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate)
(Substrate)
LITERATURE
(Substrate)
(Substrate)
COMMENTARY
(Product)
(Product)
LITERATURE
(Product)
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
5-amino-2,6-dioxy-4-(5'-phosphoribosylamino)pyrimidine + NADPH
5-amino-2,6-dioxy-4-(5'-phosphoribitylamino)pyrimidine + NADP+
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
5-amino-2,6-dioxy-4-(5'-phosphoribosylamino)pyrimidine + NADPH
5-amino-2,6-dioxy-4-(5'-phosphoribitylamino)pyrimidine + NADP+
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intermediate in the biosynthesis of riboflavin
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?
5-amino-2,6-dioxy-4-(5'-phosphoribosylamino)pyrimidine + NADPH
5-amino-2,6-dioxy-4-(5'-phosphoribitylamino)pyrimidine + NADP+
Escherichia coli B / ATCC 11303
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intermediate in the biosynthesis of riboflavin
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?
5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
P17618
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5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
P25539
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5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
Q2VCF5
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5-amino-6-ribosylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADPH + H+
5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione 5'-phosphate + NADP+
Q2VCF5
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additional information
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Q2VCF5
the enzyme is involved in riboflavin biosynthesis, overview
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additional information
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the enzyme is involved in riboflavin biosynthesis, overview
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additional information
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Q2VCF5
the enzyme is involved in riboflavin biosynthesis, overview
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COFACTOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
Mg2+
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KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
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pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
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TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
37
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SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
SOURCE
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PDB
SCOP
CATH
ORGANISM
UNIPROT
Acinetobacter baumannii (strain ATCC 19606 / DSM 30007 / CIP 70.34 / JCM 6841 / NBRC 109757 / NCIMB 12457 / NCTC 12156 / 81)
Acinetobacter baumannii (strain ATCC 19606 / DSM 30007 / CIP 70.34 / JCM 6841 / NBRC 109757 / NCIMB 12457 / NCTC 12156 / 81)
Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440)
Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)
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MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
40000
2 * 42038, calculated, 2 * 40000, SDS-PAGE, tagged recombinant protein
42038
2 * 42038, calculated, 2 * 40000, SDS-PAGE, tagged recombinant protein
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SUBUNITS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
dimer
additional information
dimer
2 * 42038, calculated, 2 * 40000, SDS-PAGE, tagged recombinant protein
dimer
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2 * 42038, calculated, 2 * 40000, SDS-PAGE, tagged recombinant protein
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Crystallization/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
orthorhombic and tetragonal crystal forms at 2.2 and 2.0 A resolution
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STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
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Purification/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
recombinant enzyme from Escherichia coli to homogeneity
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Cloned/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
gene ribD, i.e. ribG, DNA and amino acid sequence determination and analysis, expression in Escherichia coli strain BL21(DE3)
gene ribG, i.e. ribD, DNA and amino acid sequence determination and analysis, expression in Escherichia coli strain BL21(DE3)
gene ribG, ribG forms an expression unit with ribY, a monofunctional GTP cyclohydrolase II, DNA and amino acid sequence determination and analysis, overexpression in Escherichia coli strain BL21(DE3)
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ENGINEERING
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
additional information
additional information
a ribG mutant can be rescued by expression of ribB, overview
additional information
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a ribG mutant can be rescued by expression of ribB, overview
additional information
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a ribG mutant can be rescued by expression of ribB, overview
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LINKS TO OTHER DATABASES (specific for EC-Number 1.1.1.193)
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