ID S2YG11_9ACTN Unreviewed; 161 AA.
AC S2YG11;
DT 18-SEP-2013, integrated into UniProtKB/TrEMBL.
DT 18-SEP-2013, sequence version 1.
DT 24-JAN-2024, entry version 52.
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 ORFNames=HMPREF1211_04235 {ECO:0000313|EMBL:EPD61210.1};
OS Streptomyces sp. HGB0020.
OC Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC Streptomycetaceae; Streptomyces.
OX NCBI_TaxID=1078086 {ECO:0000313|EMBL:EPD61210.1, ECO:0000313|Proteomes:UP000014410};
RN [1] {ECO:0000313|EMBL:EPD61210.1, ECO:0000313|Proteomes:UP000014410}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=HGB0020 {ECO:0000313|EMBL:EPD61210.1,
RC ECO:0000313|Proteomes:UP000014410};
RG The Broad Institute Genomics Platform;
RA Earl A., Ward D., Feldgarden M., Gevers D., Schmidt T.M., Dai D., Dover J.,
RA Kim K., Walker B., Young S., Zeng Q., Gargeya S., Fitzgerald M., Haas B.,
RA Abouelleil A., Allen A.W., Alvarado L., Arachchi H.M., Berlin A.M.,
RA Chapman S.B., Gainer-Dewar J., Goldberg J., Griggs A., Gujja S., Hansen M.,
RA Howarth C., Imamovic A., Ireland A., Larimer J., McCowan C., Murphy C.,
RA Pearson M., Poon T.W., Priest M., Roberts A., Saif S., Shea T., Sisk P.,
RA Sykes S., Wortman J., Nusbaum C., Birren B.;
RT "The Genome Sequence of Streptomyces sp. HGB0020.";
RL Submitted (APR-2013) to the EMBL/GenBank/DDBJ databases.
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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EPD61210.1}.
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DR EMBL; AGER01000016; EPD61210.1; -; Genomic_DNA.
DR RefSeq; WP_016434183.1; NZ_KE150427.1.
DR AlphaFoldDB; S2YG11; -.
DR STRING; 1078086.HMPREF1211_04235; -.
DR PATRIC; fig|1078086.3.peg.4283; -.
DR HOGENOM; CLU_089358_1_2_11; -.
DR OrthoDB; 9809709at2; -.
DR UniPathway; UPA00275; UER00404.
DR Proteomes; UP000014410; Unassembled WGS sequence.
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; 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:UP000014410};
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 89
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 26
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 58..60
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 81..83
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 86..87
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 114
FT /ligand="5-amino-6-(D-ribitylamino)uracil"
FT /ligand_id="ChEBI:CHEBI:15934"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
FT BINDING 128
FT /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT /ligand_id="ChEBI:CHEBI:58830"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00178"
SQ SEQUENCE 161 AA; 16818 MW; 4E060E5E61F3FD20 CRC64;
MSGKGAPELS VRNVGDLRVA VIAAQWHEKV MDGLVDGALR ALRDLGIDEP TLLRVPGSWE
LPVVAKVLAG RGYDAIVALG VVIRGGTPHF DYVCQGVTQG LTQVSVDTGV PVGFGLLTCD
NEEQALDRAG LPGSNEDKGH EAVTAAVATA ATLRSVSEPW H
//
