RISB_MAGMM
ID RISB_MAGMM Reviewed; 156 AA.
AC A0L3Z9;
DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT 12-DEC-2006, sequence version 1.
DT 03-AUG-2022, entry version 87.
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=Mmc1_0165;
OS Magnetococcus marinus (strain ATCC BAA-1437 / JCM 17883 / MC-1).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Magnetococcales;
OC Magnetococcaceae; Magnetococcus.
OX NCBI_TaxID=156889;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-1437 / JCM 17883 / MC-1;
RX PubMed=19465526; DOI=10.1128/aem.02874-08;
RA Schubbe S., Williams T.J., Xie G., Kiss H.E., Brettin T.S., Martinez D.,
RA Ross C.A., Schuler D., Cox B.L., Nealson K.H., Bazylinski D.A.;
RT "Complete genome sequence of the chemolithoautotrophic marine magnetotactic
RT coccus strain MC-1.";
RL Appl. Environ. Microbiol. 75:4835-4852(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; CP000471; ABK42692.1; -; Genomic_DNA.
DR AlphaFoldDB; A0L3Z9; -.
DR SMR; A0L3Z9; -.
DR STRING; 156889.Mmc1_0165; -.
DR PRIDE; A0L3Z9; -.
DR EnsemblBacteria; ABK42692; ABK42692; Mmc1_0165.
DR KEGG; mgm:Mmc1_0165; -.
DR eggNOG; COG0054; Bacteria.
DR HOGENOM; CLU_089358_1_1_5; -.
DR OMA; CQGVTQG; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000002586; 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 Reference proteome; Riboflavin biosynthesis; Transferase.
FT CHAIN 1..156
FT /note="6,7-dimethyl-8-ribityllumazine synthase"
FT /id="PRO_1000077238"
FT ACT_SITE 91
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 25
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 59..61
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 83..85
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 88..89
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 116
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT BINDING 130
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
SQ SEQUENCE 156 AA; 16701 MW; FB9C3D81E82164DC CRC64;
MGDIIELEGH LTVDGKKFCL LLSRFNSFIT ERLLEGAIDC IVRHGGKRED ITVARVPGAF
ELPLVAQKAA KSGKYDGIVC LGAVIRGSTP HFDYVSSEVT KGVASISLAY DMPIGFGVLT
TDTVEQAIDR AGTKAGNKGW EATISVIEMI NLLDGM
