ID   RIBC_BACSU              Reviewed;         316 AA.
AC   P54575; P70987;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   29-AUG-2003, sequence version 2.
DT   02-SEP-2026, entry version 147.
DE   RecName: Full=Bifunctional riboflavin kinase/FMN adenylyltransferase {ECO:0000250|UniProtKB:Q59263};
DE   AltName: Full=Riboflavin biosynthesis protein RibF {ECO:0000250|UniProtKB:Q59263};
DE   Includes:
DE     RecName: Full=Riboflavin kinase {ECO:0000250|UniProtKB:Q59263};
DE              EC=2.7.1.26 {ECO:0000250|UniProtKB:Q59263};
DE     AltName: Full=Flavokinase {ECO:0000250|UniProtKB:Q59263};
DE   Includes:
DE     RecName: Full=FMN adenylyltransferase {ECO:0000250|UniProtKB:Q59263};
DE              EC=2.7.7.2 {ECO:0000250|UniProtKB:Q59263};
DE     AltName: Full=FAD pyrophosphorylase {ECO:0000250|UniProtKB:Q59263};
DE     AltName: Full=FAD synthase {ECO:0000250|UniProtKB:Q59263};
GN   Name=ribC; OrderedLocusNames=BSU16670;
OS   Bacillus subtilis (strain 168).
OC   Bacteria; Bacillati; Bacillota; Bacilli; Caryophanales; Bacillaceae;
OC   Bacillus.
OX   NCBI_TaxID=224308;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=168;
RX   PubMed=9454067;
RA   Gusarov I.I., Kreneva R.A., Rybak K.V., Podcherniaev D.A., Iomantas I.U.V.,
RA   Kolibaba L.G., Polanuer B.M., Kozlov I.U.I., Perumov D.A.;
RT   "Primary structure and functional activity of the Bacillus subtilis ribC
RT   gene.";
RL   Mol. Biol. (Mosk.) 31:820-825(1997).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=168;
RX   PubMed=9108293; DOI=10.1007/s004380050393;
RA   Coquard D., Huecas M., Ott M., van Dijl J.M., van Loon A.P., Hohmann H.P.;
RT   "Molecular cloning and characterisation of the ribC gene from Bacillus
RT   subtilis: a point mutation in ribC results in riboflavin overproduction.";
RL   Mol. Gen. Genet. 254:81-84(1997).
RN   [3]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=168;
RX   PubMed=9384377; DOI=10.1038/36786;
RA   Kunst F., Ogasawara N., Moszer I., Albertini A.M., Alloni G., Azevedo V.,
RA   Bertero M.G., Bessieres P., Bolotin A., Borchert S., Borriss R.,
RA   Boursier L., Brans A., Braun M., Brignell S.C., Bron S., Brouillet S.,
RA   Bruschi C.V., Caldwell B., Capuano V., Carter N.M., Choi S.-K.,
RA   Codani J.-J., Connerton I.F., Cummings N.J., Daniel R.A., Denizot F.,
RA   Devine K.M., Duesterhoeft A., Ehrlich S.D., Emmerson P.T., Entian K.-D.,
RA   Errington J., Fabret C., Ferrari E., Foulger D., Fritz C., Fujita M.,
RA   Fujita Y., Fuma S., Galizzi A., Galleron N., Ghim S.-Y., Glaser P.,
RA   Goffeau A., Golightly E.J., Grandi G., Guiseppi G., Guy B.J., Haga K.,
RA   Haiech J., Harwood C.R., Henaut A., Hilbert H., Holsappel S., Hosono S.,
RA   Hullo M.-F., Itaya M., Jones L.-M., Joris B., Karamata D., Kasahara Y.,
RA   Klaerr-Blanchard M., Klein C., Kobayashi Y., Koetter P., Koningstein G.,
RA   Krogh S., Kumano M., Kurita K., Lapidus A., Lardinois S., Lauber J.,
RA   Lazarevic V., Lee S.-M., Levine A., Liu H., Masuda S., Mauel C.,
RA   Medigue C., Medina N., Mellado R.P., Mizuno M., Moestl D., Nakai S.,
RA   Noback M., Noone D., O'Reilly M., Ogawa K., Ogiwara A., Oudega B.,
RA   Park S.-H., Parro V., Pohl T.M., Portetelle D., Porwollik S.,
RA   Prescott A.M., Presecan E., Pujic P., Purnelle B., Rapoport G., Rey M.,
RA   Reynolds S., Rieger M., Rivolta C., Rocha E., Roche B., Rose M., Sadaie Y.,
RA   Sato T., Scanlan E., Schleich S., Schroeter R., Scoffone F., Sekiguchi J.,
RA   Sekowska A., Seror S.J., Serror P., Shin B.-S., Soldo B., Sorokin A.,
RA   Tacconi E., Takagi T., Takahashi H., Takemaru K., Takeuchi M.,
RA   Tamakoshi A., Tanaka T., Terpstra P., Tognoni A., Tosato V., Uchiyama S.,
RA   Vandenbol M., Vannier F., Vassarotti A., Viari A., Wambutt R., Wedler E.,
RA   Wedler H., Weitzenegger T., Winters P., Wipat A., Yamamoto H., Yamane K.,
RA   Yasumoto K., Yata K., Yoshida K., Yoshikawa H.-F., Zumstein E.,
RA   Yoshikawa H., Danchin A.;
RT   "The complete genome sequence of the Gram-positive bacterium Bacillus
RT   subtilis.";
RL   Nature 390:249-256(1997).
CC   -!- FUNCTION: Catalyzes the phosphorylation of riboflavin to FMN followed
CC       by the adenylation of FMN to FAD. {ECO:0000250|UniProtKB:Q59263}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=riboflavin + ATP = FMN + ADP + H(+); Xref=Rhea:RHEA:14357,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:57986,
CC         ChEBI:CHEBI:58210, ChEBI:CHEBI:456216; EC=2.7.1.26;
CC         Evidence={ECO:0000250|UniProtKB:Q59263};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=FMN + ATP + H(+) = FAD + diphosphate; Xref=Rhea:RHEA:17237,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019,
CC         ChEBI:CHEBI:57692, ChEBI:CHEBI:58210; EC=2.7.7.2;
CC         Evidence={ECO:0000250|UniProtKB:Q59263};
CC   -!- PATHWAY: Cofactor biosynthesis; FAD biosynthesis; FAD from FMN: step
CC       1/1. {ECO:0000250|UniProtKB:Q59263}.
CC   -!- PATHWAY: Cofactor biosynthesis; FMN biosynthesis; FMN from riboflavin
CC       (ATP route): step 1/1. {ECO:0000250|UniProtKB:Q59263}.
CC   -!- SIMILARITY: Belongs to the RibF family. {ECO:0000305}.
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DR   EMBL; X95312; CAA64624.1; -; Genomic_DNA.
DR   EMBL; Z80835; CAB02559.1; -; Genomic_DNA.
DR   EMBL; AL009126; CAB13540.1; -; Genomic_DNA.
DR   PIR; D69692; D69692.
DR   RefSeq; NP_389549.1; NC_000964.3.
DR   RefSeq; WP_003245551.1; NC_000964.3.
DR   AlphaFoldDB; P54575; -.
DR   SMR; P54575; -.
DR   FunCoup; P54575; 548.
DR   STRING; 224308.BSU16670; -.
DR   MoonProt; P54575; -.
DR   PaxDb; 224308-BSU16670; -.
DR   DNASU; 938110; -.
DR   EnsemblBacteria; CAB13540; CAB13540; BSU_16670.
DR   GeneID; 938110; -.
DR   KEGG; bsu:BSU16670; -.
DR   PATRIC; fig|224308.179.peg.1808; -.
DR   eggNOG; COG0196; Bacteria.
DR   InParanoid; P54575; -.
DR   OrthoDB; 9803667at2; -.
DR   PhylomeDB; P54575; -.
DR   BioCyc; BSUB:BSU16670-MONOMER; -.
DR   BioCyc; MetaCyc:MONOMER-14605; -.
DR   BRENDA; 2.7.1.26; 658.
DR   BRENDA; 2.7.7.2; 658.
DR   UniPathway; UPA00276; UER00406.
DR   UniPathway; UPA00277; UER00407.
DR   Proteomes; UP000001570; Chromosome.
DR   AbasyAtlas; P54575; -.
DR   GO; GO:0003919; F:FMN adenylyltransferase activity; ISS:UniProtKB.
DR   GO; GO:0008531; F:riboflavin kinase activity; ISS:UniProtKB.
DR   GO; GO:0006747; P:FAD biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0009398; P:FMN biosynthetic process; IBA:GO_Central.
DR   GO; GO:0009231; P:riboflavin biosynthetic process; IEA:InterPro.
DR   GO; GO:0006771; P:riboflavin metabolic process; IBA:GO_Central.
DR   CDD; cd02064; FAD_synthetase_N; 1.
DR   FunFam; 2.40.30.30:FF:000004; Riboflavin biosynthesis protein; 1.
DR   FunFam; 3.40.50.620:FF:000021; Riboflavin biosynthesis protein; 1.
DR   Gene3D; 3.40.50.620; HUPs; 1.
DR   Gene3D; 2.40.30.30; Riboflavin kinase-like; 1.
DR   InterPro; IPR004821; Cyt_trans-like.
DR   InterPro; IPR015864; FAD_synthase.
DR   InterPro; IPR023468; Riboflavin_kinase.
DR   InterPro; IPR002606; Riboflavin_kinase_bac.
DR   InterPro; IPR015865; Riboflavin_kinase_bac/euk.
DR   InterPro; IPR023465; Riboflavin_kinase_dom_sf.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   NCBIfam; TIGR00125; cyt_tran_rel; 1.
DR   NCBIfam; NF004161; PRK05627.1-4; 1.
DR   NCBIfam; NF004162; PRK05627.1-5; 1.
DR   NCBIfam; TIGR00083; ribF; 1.
DR   PANTHER; PTHR22749:SF6; RIBOFLAVIN KINASE; 1.
DR   PANTHER; PTHR22749; RIBOFLAVIN KINASE/FMN ADENYLYLTRANSFERASE; 1.
DR   Pfam; PF06574; FAD_syn; 1.
DR   Pfam; PF01687; Flavokinase; 1.
DR   PIRSF; PIRSF004491; FAD_Synth; 1.
DR   SMART; SM00904; Flavokinase; 1.
DR   SUPFAM; SSF52374; Nucleotidylyl transferase; 1.
DR   SUPFAM; SSF82114; Riboflavin kinase-like; 1.
PE   3: Inferred from homology;
KW   ATP-binding; FAD; Flavoprotein; FMN; Kinase; Multifunctional enzyme;
KW   Nucleotide-binding; Nucleotidyltransferase; Reference proteome;
KW   Transferase.
FT   CHAIN           1..316
FT                   /note="Bifunctional riboflavin kinase/FMN
FT                   adenylyltransferase"
FT                   /id="PRO_0000194133"
FT   CONFLICT        199
FT                   /note="G -> N (in Ref. 1; CAA64624)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   316 AA;  35662 MW;  0B8F11D356B7D7B9 CRC64;
     MKTIHITHPH HLIKEEQAKS VMALGYFDGV HLGHQKVIGT AKQIAEEKGL TLAVMTFHPH
     PSHVLGRDKE PKDLITPLED KINQIEQLGT EVLYVVKFNE VFASLSPKQF IDQYIIGLNV
     QHAVAGFDFT YGKYGKGTMK TMPDDLDGKA GCTMVEKLTE QDKKISSSYI RTALQNGDVE
     LANVLLGQPY FIKGIVIHGD KRGRTIGFPT ANVGLNNSYI VPPTGVYAVK AEVNGEVYNG
     VCNIGYKPTF YEKRPEQPSI EVNLFDFNQE VYGAAIKIEW YKRIRSERKF NGIKELTEQI
     EKDKQEAIRY FSNLRK
//