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Information on EC 2.5.1.78 - 6,7-dimethyl-8-ribityllumazine synthase and Organism(s) Halobacterium salinarum and UniProt Accession Q9HRM5

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IUBMB Comments
Involved in riboflavin biosynthesis.
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This record set is specific for:
Halobacterium salinarum
UNIPROT: Q9HRM5
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The taxonomic range for the selected organisms is: Halobacterium salinarum
The enzyme appears in selected viruses and cellular organisms
Synonyms
lumazine synthase, 6,7-dimethyl-8-ribityllumazine synthase, ribh2, ribh1, mj0303, ribh1 protein, dmrl synthase, 6,7-dimethyl-8-(d-ribityl)lumazine synthase, more
SYSTEMATIC NAME
IUBMB Comments
5-amino-6-(D-ribitylamino)uracil butanedionetransferase
Involved in riboflavin biosynthesis.
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
5-amino-6-(1-D-ribitylamino)pyrimidine-2,4(1H,3H)-dione + (S)-2-hydroxy-3-oxobutyl dihydrogen phosphate
6,7-dimethyl-8-(1-D-ribityl)lumazine + phosphate + 2 H2O
show the reaction diagram
penultimate step of riboflavin biosynthesis
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?
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
5-amino-6-(1-D-ribitylamino)pyrimidine-2,4(1H,3H)-dione + (S)-2-hydroxy-3-oxobutyl dihydrogen phosphate
6,7-dimethyl-8-(1-D-ribityl)lumazine + phosphate + 2 H2O
show the reaction diagram
penultimate step of riboflavin biosynthesis
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-
?
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
lumazine synthase is found in different species in two different quaternary structures, pentameric and icosahedral, built from practically the same structural monomeric unit. The icosahedral structure is best described as a capsid of twelve pentamers. Despite this noticeable difference, the active sites are virtually identical in all structurally studied members. The main regions involved in the catalysis are located at the interface between adjacent subunits in the pentamer. Combined analysis that includes sequence-structure and evolutionary studies to find the sequence determinants of the different quaternary assemblies of this enzyme. The positions involved in icosahedral contacts suffer a larger increase in constraints than the rest. Eight sequence sites that would be the most important icosahedral sequence determinants are identified
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Fornasari, M.S.; Laplagne, D.A.; Frankel, N.; Cauerhff, A.A.; Goldbaum, F.A.; Echave, J.
Sequence determinants of quaternary structure in lumazine synthase
Mol. Biol. Evol.
21
97-107
2003
Spinacia oleracea, Corynebacterium ammoniagenes (O24753), Helicobacter pylori (O24854), Methanothermobacter thermautotrophicus (O27443), Archaeoglobus fulgidus (O28152), Aquifex aeolicus (O66529), Sulfurospirillum multivorans (O68250), Arabidopsis thaliana (O80575), Chlamydia trachomatis (O84737), Bacillus subtilis (P11998), Haemophilus influenzae (P45149), Actinobacillus pleuropneumoniae (P50856), Saccharomyces cerevisiae (P50861), Photobacterium phosphoreum (P51963), Pasteurella multocida (P57869), Brucella abortus (P61711), Synechocystis sp. (P73527), Photobacterium leiognathi (Q01994), Photobacterium leiognathi (Q93E92), Bacillus amyloliquefaciens (Q44681), Rhodococcus erythropolis (Q53107), Methanocaldococcus jannaschii (Q57751), Buchnera aphidicola (Q8K9A6), Buchnera aphidicola (Q9ZNM0), Chlorobaculum tepidum (Q8KAW4), Corynebacterium glutamicum (Q8NQ53), Xanthomonas campestris (Q8PCM7), Xanthomonas citri (Q8PPD6), Methanosarcina mazei (Q8Q093), Fusobacterium nucleatum (Q8RIR4), Methanosarcina acetivorans (Q8TPT7), Methanopyrus kandleri (Q8TYL5), Agrobacterium tumefaciens (Q8UG70), Clostridium perfringens (Q8XMW9), Ralstonia solanacearum (Q8Y1H8), Anabaena sp. (Q8YQ43), Yersinia pestis (Q8ZC41), Pyrobaculum aerophilum (Q8ZTE3), Sinorhizobium meliloti (Q92NI1), Sinorhizobium meliloti (Q92QU0), Sulfurisphaera tokodaii (Q975M5), Clostridium acetobutylicum (Q97LG8), Mesorhizobium loti (Q983B0), Mesorhizobium loti (Q986N2), Caulobacter vibrioides (Q9A8J4), Caulobacter vibrioides (Q9A9S4), Mycobacterium leprae (Q9CCP3), Lactococcus lactis subsp. lactis (Q9CGU6), Streptomyces coelicolor (Q9EWJ9), Halobacterium salinarum (Q9HRM5), Pseudomonas aeruginosa (Q9HWX5), Halalkalibacterium halodurans (Q9KCL4), Vibrio cholerae (Q9KPU4), Xylella fastidiosa (Q9PES4), Campylobacter jejuni (Q9PIB9), Chlamydia muridarum (Q9PLJ4), Bartonella henselae (Q9REF4), Deinococcus radiodurans (Q9RXZ8), Schizosaccharomyces pombe (Q9UUB1), Pyricularia grisea (Q9UVT8), Thermotoga maritima (Q9X2E5), Nicotiana tabacum (Q9XH13), Chlamydia pneumoniae (Q9Z733), Helicobacter pylori J99 (Q9ZN56), Agrobacterium tumefaciens C58 / ATCC 33970 (Q8UG70)
Manually annotated by BRENDA team