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RISB_TERTT
ID   RISB_TERTT              Reviewed;         155 AA.
AC   C5BS85;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   03-AUG-2022, entry version 65.
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=TERTU_3701;
OS   Teredinibacter turnerae (strain ATCC 39867 / T7901).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Teredinibacter.
OX   NCBI_TaxID=377629;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 39867 / T7901;
RX   PubMed=19568419; DOI=10.1371/journal.pone.0006085;
RA   Yang J.C., Madupu R., Durkin A.S., Ekborg N.A., Pedamallu C.S.,
RA   Hostetler J.B., Radune D., Toms B.S., Henrissat B., Coutinho P.M.,
RA   Schwarz S., Field L., Trindade-Silva A.E., Soares C.A.G., Elshahawi S.,
RA   Hanora A., Schmidt E.W., Haygood M.G., Posfai J., Benner J., Madinger C.,
RA   Nove J., Anton B., Chaudhary K., Foster J., Holman A., Kumar S.,
RA   Lessard P.A., Luyten Y.A., Slatko B., Wood N., Wu B., Teplitski M.,
RA   Mougous J.D., Ward N., Eisen J.A., Badger J.H., Distel D.L.;
RT   "The complete genome of Teredinibacter turnerae T7901: an intracellular
RT   endosymbiont of marine wood-boring bivalves (shipworms).";
RL   PLoS ONE 4:E6085-E6085(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   -!- SUBUNIT: Forms an icosahedral capsid composed of 60 subunits, arranged
CC       as a dodecamer of pentamers. {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; CP001614; ACR14319.1; -; Genomic_DNA.
DR   RefSeq; WP_015820435.1; NC_012997.1.
DR   AlphaFoldDB; C5BS85; -.
DR   SMR; C5BS85; -.
DR   STRING; 377629.TERTU_3701; -.
DR   EnsemblBacteria; ACR14319; ACR14319; TERTU_3701.
DR   GeneID; 58411008; -.
DR   KEGG; ttu:TERTU_3701; -.
DR   eggNOG; COG0054; Bacteria.
DR   HOGENOM; CLU_089358_1_1_6; -.
DR   OMA; CQGVTQG; -.
DR   OrthoDB; 1680292at2; -.
DR   UniPathway; UPA00275; UER00404.
DR   Proteomes; UP000009080; 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..155
FT                   /note="6,7-dimethyl-8-ribityllumazine synthase"
FT                   /id="PRO_1000203806"
FT   ACT_SITE        90
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         24
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|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:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         82..84
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         87..88
FT                   /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58830"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         115
FT                   /ligand="5-amino-6-(D-ribitylamino)uracil"
FT                   /ligand_id="ChEBI:CHEBI:15934"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
FT   BINDING         129
FT                   /ligand="(2S)-2-hydroxy-3-oxobutyl phosphate"
FT                   /ligand_id="ChEBI:CHEBI:58830"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00178"
SQ   SEQUENCE   155 AA;  16270 MW;  402E40FDB75FD6C6 CRC64;
     MTIKIIEGDF KSATGKYALL VSRWNSFVVE HLKEGALDTL RRHGVSDDDI EIVYAPGAFE
     FPLAAQKLAA SGDYDAIVAL GAVIRGGTPH FDYVAGECTK GLAQVSLATG IPVAFGVLTV
     DSIEQAIERS GTKAGNKGSE AAETALEMVS LLGKL
 
 
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