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RISB_STAMF
ID   RISB_STAMF              Reviewed;         150 AA.
AC   A3DLT5;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   20-MAR-2007, sequence version 1.
DT   03-AUG-2022, entry version 75.
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=Smar_0487;
OS   Staphylothermus marinus (strain ATCC 43588 / DSM 3639 / JCM 9404 / F1).
OC   Archaea; Crenarchaeota; Thermoprotei; Desulfurococcales;
OC   Desulfurococcaceae; Staphylothermus.
OX   NCBI_TaxID=399550;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 43588 / DSM 3639 / JCM 9404 / F1;
RX   PubMed=19341479; DOI=10.1186/1471-2164-10-145;
RA   Anderson I.J., Dharmarajan L., Rodriguez J., Hooper S., Porat I.,
RA   Ulrich L.E., Elkins J.G., Mavromatis K., Sun H., Land M., Lapidus A.,
RA   Lucas S., Barry K., Huber H., Zhulin I.B., Whitman W.B., Mukhopadhyay B.,
RA   Woese C., Bristow J., Kyrpides N.;
RT   "The complete genome sequence of Staphylothermus marinus reveals
RT   differences in sulfur metabolism among heterotrophic Crenarchaeota.";
RL   BMC Genomics 10:145-145(2009).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 43588 / DSM 3639 / JCM 9404 / F1;
RX   PubMed=21304655; DOI=10.4056/sigs.30527;
RA   Anderson I.J., Sun H., Lapidus A., Copeland A., Glavina Del Rio T.,
RA   Tice H., Dalin E., Lucas S., Barry K., Land M., Richardson P., Huber H.,
RA   Kyrpides N.C.;
RT   "Complete genome sequence of Staphylothermus marinus Stetter and Fiala 1986
RT   type strain F1.";
RL   Stand. Genomic Sci. 1:183-188(2009).
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   -!- SIMILARITY: Belongs to the DMRL synthase family. {ECO:0000255|HAMAP-
CC       Rule:MF_00178}.
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DR   EMBL; CP000575; ABN69595.1; -; Genomic_DNA.
DR   RefSeq; WP_011838786.1; NC_009033.1.
DR   AlphaFoldDB; A3DLT5; -.
DR   SMR; A3DLT5; -.
DR   STRING; 399550.Smar_0487; -.
DR   EnsemblBacteria; ABN69595; ABN69595; Smar_0487.
DR   GeneID; 4908000; -.
DR   KEGG; smr:Smar_0487; -.
DR   eggNOG; arCOG01323; Archaea.
DR   HOGENOM; CLU_089358_3_1_2; -.
DR   OMA; SGPGMTR; -.
DR   OrthoDB; 88531at2157; -.
DR   UniPathway; UPA00275; UER00404.
DR   Proteomes; UP000000254; 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   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   Reference proteome; Riboflavin biosynthesis; Transferase.
FT   CHAIN           1..150
FT                   /note="6,7-dimethyl-8-ribityllumazine synthase"
FT                   /id="PRO_1000040525"
FT   ACT_SITE        75
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         11
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         43..45
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         67..69
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         72..73
FT                   /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58830"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         100
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         115
FT                   /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58830"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
SQ   SEQUENCE   150 AA;  16577 MW;  7E5061EDC50180AF CRC64;
     MARIGIVVSE FNYDITYLML QKAISHARFL GLEITYVFKV PGTYEIPFAV ANLLKRNDVD
     GVVALGAVIK GATKHDELVA SQTARKLMDL MIQYGKPVGL GIIGPGATRM QALERVEDYA
     RRAVEAVAKM INRSKSLEEK KFAGETVFIE
 
 
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