RISB_BACAH
ID RISB_BACAH Reviewed; 153 AA.
AC A0RIB4;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 09-JAN-2007, sequence version 1.
DT 03-AUG-2022, entry version 90.
DE RecName: Full=6,7-dimethyl-8-ribityllumazine synthase {ECO:0000255|HAMAP-Rule:MF_00178};
DE Short=DMRL synthase {ECO:0000255|HAMAP-Rule:MF_00178};
DE Short=LS {ECO:0000255|HAMAP-Rule:MF_00178};
DE Short=Lumazine synthase {ECO:0000255|HAMAP-Rule:MF_00178};
DE EC=2.5.1.78 {ECO:0000255|HAMAP-Rule:MF_00178};
GN Name=ribH {ECO:0000255|HAMAP-Rule:MF_00178}; OrderedLocusNames=BALH_3728;
OS Bacillus thuringiensis (strain Al Hakam).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Bacillus;
OC Bacillus cereus group.
OX NCBI_TaxID=412694;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Al Hakam;
RX PubMed=17337577; DOI=10.1128/jb.00241-07;
RA Challacombe J.F., Altherr M.R., Xie G., Bhotika S.S., Brown N., Bruce D.,
RA Campbell C.S., Campbell M.L., Chen J., Chertkov O., Cleland C.,
RA Dimitrijevic M., Doggett N.A., Fawcett J.J., Glavina T., Goodwin L.A.,
RA Green L.D., Han C.S., Hill K.K., Hitchcock P., Jackson P.J., Keim P.,
RA Kewalramani A.R., Longmire J., Lucas S., Malfatti S., Martinez D.,
RA McMurry K., Meincke L.J., Misra M., Moseman B.L., Mundt M., Munk A.C.,
RA Okinaka R.T., Parson-Quintana B., Reilly L.P., Richardson P.,
RA Robinson D.L., Saunders E., Tapia R., Tesmer J.G., Thayer N.,
RA Thompson L.S., Tice H., Ticknor L.O., Wills P.L., Gilna P., Brettin T.S.;
RT "The complete genome sequence of Bacillus thuringiensis Al Hakam.";
RL J. Bacteriol. 189:3680-3681(2007).
CC -!- FUNCTION: Catalyzes the formation of 6,7-dimethyl-8-ribityllumazine by
CC condensation of 5-amino-6-(D-ribitylamino)uracil with 3,4-dihydroxy-2-
CC butanone 4-phosphate. This is the penultimate step in the biosynthesis
CC of riboflavin. {ECO:0000255|HAMAP-Rule:MF_00178}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2S)-2-hydroxy-3-oxobutyl phosphate + 5-amino-6-(D-
CC ribitylamino)uracil = 6,7-dimethyl-8-(1-D-ribityl)lumazine + H(+) + 2
CC H2O + phosphate; Xref=Rhea:RHEA:26152, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:15934, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:58201, ChEBI:CHEBI:58830; EC=2.5.1.78;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00178};
CC -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; riboflavin
CC from 2-hydroxy-3-oxobutyl phosphate and 5-amino-6-(D-
CC ribitylamino)uracil: step 1/2. {ECO:0000255|HAMAP-Rule:MF_00178}.
CC -!- SUBUNIT: Forms an icosahedral capsid composed of 60 subunits, arranged
CC as a dodecamer of pentamers. {ECO:0000255|HAMAP-Rule:MF_00178}.
CC -!- SIMILARITY: Belongs to the DMRL synthase family. {ECO:0000255|HAMAP-
CC Rule:MF_00178}.
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DR EMBL; CP000485; ABK86957.1; -; Genomic_DNA.
DR RefSeq; WP_000230892.1; NC_008600.1.
DR AlphaFoldDB; A0RIB4; -.
DR SMR; A0RIB4; -.
DR PRIDE; A0RIB4; -.
DR EnsemblBacteria; ABK86957; ABK86957; BALH_3728.
DR KEGG; btl:BALH_3728; -.
DR HOGENOM; CLU_089358_1_1_9; -.
DR OMA; CQGVTQG; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000000761; Chromosome.
DR GO; GO:0009349; C:riboflavin synthase complex; IEA:InterPro.
DR GO; GO:0000906; F:6,7-dimethyl-8-ribityllumazine synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009231; P:riboflavin biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd09209; Lumazine_synthase-I; 1.
DR Gene3D; 3.40.50.960; -; 1.
DR HAMAP; MF_00178; Lumazine_synth; 1.
DR InterPro; IPR034964; LS.
DR InterPro; IPR002180; LS/RS.
DR InterPro; IPR036467; LS/RS_sf.
DR PANTHER; PTHR21058; PTHR21058; 1.
DR Pfam; PF00885; DMRL_synthase; 1.
DR SUPFAM; SSF52121; SSF52121; 1.
DR TIGRFAMs; TIGR00114; lumazine-synth; 1.
PE 3: Inferred from homology;
KW Riboflavin biosynthesis; Transferase.
FT CHAIN 1..153
FT /note="6,7-dimethyl-8-ribityllumazine synthase"
FT /id="PRO_1000040366"
FT ACT_SITE 87
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 21
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 55..57
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 79..81
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 84..85
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 112
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 126
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
SQ SEQUENCE 153 AA; 16246 MW; AA5386484EA66839 CRC64;
MVFEGHLVGT GLKVGVVVGR FNEFITSKLL GGALDGLKRH GVEENDIDVA WVPGAFEIPL
IAKKMANSGK YDAVITLGTV IRGATTHYDY VCNEVAKGVA SLSLQTDIPV IFGVLTTETI
EQAIERAGTK AGNKGYESAV AAIEMAHLSK QWA
