RISB_PICTO
ID RISB_PICTO Reviewed; 136 AA.
AC Q6L153;
DT 30-AUG-2005, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 95.
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=PTO0714;
OS Picrophilus torridus (strain ATCC 700027 / DSM 9790 / JCM 10055 / NBRC
OS 100828).
OC Archaea; Candidatus Thermoplasmatota; Thermoplasmata; Thermoplasmatales;
OC Picrophilaceae; Picrophilus.
OX NCBI_TaxID=263820;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700027 / DSM 9790 / JCM 10055 / NBRC 100828;
RX PubMed=15184674; DOI=10.1073/pnas.0401356101;
RA Fuetterer O., Angelov A., Liesegang H., Gottschalk G., Schleper C.,
RA Schepers B., Dock C., Antranikian G., Liebl W.;
RT "Genome sequence of Picrophilus torridus and its implications for life
RT around pH 0.";
RL Proc. Natl. Acad. Sci. U.S.A. 101:9091-9096(2004).
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; AE017261; AAT43299.1; -; Genomic_DNA.
DR RefSeq; WP_011177515.1; NC_005877.1.
DR AlphaFoldDB; Q6L153; -.
DR SMR; Q6L153; -.
DR STRING; 263820.PTO0714; -.
DR EnsemblBacteria; AAT43299; AAT43299; PTO0714.
DR GeneID; 2845293; -.
DR KEGG; pto:PTO0714; -.
DR PATRIC; fig|263820.9.peg.749; -.
DR eggNOG; arCOG01323; Archaea.
DR HOGENOM; CLU_089358_3_1_2; -.
DR OMA; SGPGMTR; -.
DR OrthoDB; 88531at2157; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000000438; 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..136
FT /note="6,7-dimethyl-8-ribityllumazine synthase"
FT /id="PRO_0000134848"
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 136 AA; 15150 MW; ECBF43E942E5CC26 CRC64;
MIRIGMVVAE FNYDITMMML ERARSYAEFL GVEVHKILRV PGSFDMPLAI KKLLMDNDID
GVVTIGAVIK GETDHHKIIM DNVSRKITDL SLEYNKPVAL GISGPGESRL QAEARIDMAK
EAVESCVKMI KLLKSN
