ID L0HD20_METFS Unreviewed; 139 AA.
AC L0HD20;
DT 06-MAR-2013, integrated into UniProtKB/TrEMBL.
DT 06-MAR-2013, sequence version 1.
DT 27-MAR-2024, entry version 51.
DE RecName: Full=6,7-dimethyl-8-ribityllumazine synthase {ECO:0000256|ARBA:ARBA00012664, ECO:0000256|HAMAP-Rule:MF_00178};
DE Short=DMRL synthase {ECO:0000256|HAMAP-Rule:MF_00178};
DE Short=LS {ECO:0000256|HAMAP-Rule:MF_00178};
DE Short=Lumazine synthase {ECO:0000256|HAMAP-Rule:MF_00178};
DE EC=2.5.1.78 {ECO:0000256|ARBA:ARBA00012664, ECO:0000256|HAMAP-Rule:MF_00178};
GN Name=ribH {ECO:0000256|HAMAP-Rule:MF_00178};
GN OrderedLocusNames=Metfor_0113 {ECO:0000313|EMBL:AGB01198.1};
OS Methanoregula formicica (strain DSM 22288 / NBRC 105244 / SMSP).
OC Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC Methanomicrobiales; Methanoregulaceae; Methanoregula.
OX NCBI_TaxID=593750 {ECO:0000313|EMBL:AGB01198.1, ECO:0000313|Proteomes:UP000010824};
RN [1] {ECO:0000313|Proteomes:UP000010824}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 22288 / NBRC 105244 / SMSP
RC {ECO:0000313|Proteomes:UP000010824};
RA Lucas S., Han J., Lapidus A., Cheng J.-F., Goodwin L., Pitluck S.,
RA Peters L., Ovchinnikova G., Teshima H., Detter J.C., Han C., Tapia R.,
RA Land M., Hauser L., Kyrpides N., Ivanova N., Pagani I., Imachi H.,
RA Tamaki H., Sekiguchi Y., Kamagata Y., Cadillo-Quiroz H., Zinder S.,
RA Liu W.-T., Woyke T.;
RT "Complete sequence of Methanoregula formicicum SMSP.";
RL Submitted (DEC-2011) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:AGB01198.1, ECO:0000313|Proteomes:UP000010824}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 22288 / NBRC 105244 / SMSP
RC {ECO:0000313|Proteomes:UP000010824};
RX PubMed=25189582;
RA Yamamoto K., Tamaki H., Cadillo-Quiroz H., Imachi H., Kyrpides N.,
RA Woyke T., Goodwin L., Zinder S.H., Kamagata Y., Liu W.T.;
RT "Complete Genome Sequence of Methanoregula formicica SMSPT, a Mesophilic
RT Hydrogenotrophic Methanogen Isolated from a Methanogenic Upflow Anaerobic
RT Sludge Blanket Reactor.";
RL Genome Announc. 2:e00870-14(2014).
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:0000256|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:0000256|ARBA:ARBA00001697, ECO:0000256|HAMAP-
CC 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:0000256|ARBA:ARBA00004917,
CC ECO:0000256|HAMAP-Rule:MF_00178}.
CC -!- SIMILARITY: Belongs to the DMRL synthase family.
CC {ECO:0000256|ARBA:ARBA00007424, ECO:0000256|HAMAP-Rule:MF_00178}.
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DR EMBL; CP003167; AGB01198.1; -; Genomic_DNA.
DR RefSeq; WP_015284162.1; NC_019943.1.
DR AlphaFoldDB; L0HD20; -.
DR STRING; 593750.Metfor_0113; -.
DR GeneID; 14308786; -.
DR KEGG; mfo:Metfor_0113; -.
DR eggNOG; arCOG01323; Archaea.
DR HOGENOM; CLU_089358_3_1_2; -.
DR InParanoid; L0HD20; -.
DR OrthoDB; 7610at2157; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000010824; 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; cd09211; Lumazine_synthase_archaeal; 1.
DR Gene3D; 3.40.50.960; Lumazine/riboflavin synthase; 1.
DR HAMAP; MF_00178; Lumazine_synth; 1.
DR InterPro; IPR034964; LS.
DR InterPro; IPR002180; LS/RS.
DR InterPro; IPR036467; LS/RS_sf.
DR NCBIfam; TIGR00114; lumazine-synth; 1.
DR PANTHER; PTHR21058:SF0; 6,7-DIMETHYL-8-RIBITYLLUMAZINE SYNTHASE; 1.
DR PANTHER; PTHR21058; 6,7-DIMETHYL-8-RIBITYLLUMAZINE SYNTHASE DMRL SYNTHASE LUMAZINE SYNTHASE; 1.
DR Pfam; PF00885; DMRL_synthase; 1.
DR SUPFAM; SSF52121; Lumazine synthase; 1.
PE 3: Inferred from homology;
KW Reference proteome {ECO:0000313|Proteomes:UP000010824};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619, ECO:0000256|HAMAP-
KW Rule:MF_00178};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00178}.
FT ACT_SITE 80
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 16
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 48..50
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 72..74
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 77..78
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 105
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 114
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
SQ SEQUENCE 139 AA; 15253 MW; 10129DE2C8C5E4F9 CRC64;
MCDTNPIKLG FVVAEFNRDI TYMMEIEGRE HAAFLGAEVT ECMYVPGAYD MPLAIKKLLT
AGKVDAVVTI GCVIEGATQH DEIVVQHAAR KIIDLSLEFG KPVALGISGP GMTRLEANER
IDYAKRAVES AIKMVKRLR
//
