ID   RIBF_BUCAP              Reviewed;         312 AA.
AC   Q8K9Z1;
DT   15-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   03-AUG-2022, entry version 100.
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=ribF; OrderedLocusNames=BUsg_143;
OS   Buchnera aphidicola subsp. Schizaphis graminum (strain Sg).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=198804;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Sg;
RX   PubMed=12089438; DOI=10.1126/science.1071278;
RA   Tamas I., Klasson L., Canbaeck B., Naeslund A.K., Eriksson A.-S.,
RA   Wernegreen J.J., Sandstroem J.P., Moran N.A., Andersson S.G.E.;
RT   "50 million years of genomic stasis in endosymbiotic bacteria.";
RL   Science 296:2376-2379(2002).
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=ATP + riboflavin = ADP + FMN + 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=ATP + FMN + H(+) = diphosphate + FAD; 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; AE013218; AAM67711.1; -; Genomic_DNA.
DR   RefSeq; WP_011053678.1; NC_004061.1.
DR   AlphaFoldDB; Q8K9Z1; -.
DR   SMR; Q8K9Z1; -.
DR   STRING; 198804.BUsg_143; -.
DR   EnsemblBacteria; AAM67711; AAM67711; BUsg_143.
DR   KEGG; bas:BUsg_143; -.
DR   eggNOG; COG0196; Bacteria.
DR   HOGENOM; CLU_048437_0_2_6; -.
DR   OMA; HRGHQAI; -.
DR   OrthoDB; 1504821at2; -.
DR   UniPathway; UPA00276; UER00406.
DR   UniPathway; UPA00277; UER00407.
DR   Proteomes; UP000000416; Chromosome.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0003919; F:FMN adenylyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0008531; F:riboflavin kinase activity; IEA:UniProtKB-EC.
DR   GO; GO:0006747; P:FAD biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0009398; P:FMN biosynthetic process; IEA:UniProtKB-UniPathway.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   GO; GO:0009231; P:riboflavin biosynthetic process; IEA:InterPro.
DR   CDD; cd02064; FAD_synthetase_N; 1.
DR   Gene3D; 2.40.30.30; -; 1.
DR   Gene3D; 3.40.50.620; -; 1.
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   PANTHER; PTHR22749; PTHR22749; 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; SSF82114; SSF82114; 1.
DR   TIGRFAMs; TIGR00083; ribF; 1.
PE   3: Inferred from homology;
KW   ATP-binding; FAD; Flavoprotein; FMN; Kinase; Multifunctional enzyme;
KW   Nucleotide-binding; Nucleotidyltransferase; Transferase.
FT   CHAIN           1..312
FT                   /note="Bifunctional riboflavin kinase/FMN
FT                   adenylyltransferase"
FT                   /id="PRO_0000194135"
SQ   SEQUENCE   312 AA;  36139 MW;  AEC2E18F28082DF4 CRC64;
     MKLIRGIHNL KKINSNSAVS IGNFDGVHLG HQKLLSNLYK IGKKNNILTV LILFEPQPLE
     FLNNKNSPKR LTTIQNKIKY IQSWKIDIIL CIKFNESFSS LSAEKFIKNI LITKLNIKFI
     IIGDDFRFGS KRNGNISLLK EIGYQYNFKV IEISSLLYKN KIKISSTNIR KCLLENKIEL
     ARKLLGRPFS ISGRVIHGNK IGRKLGYPTA NISLRKNIPL NNGVYAVKIS CFFNKKFVGI
     CNIGIKPSYF SSKKHRLLEV HLFNFNLNLY EEKIEVFLYK KIRNECFFSS KNKLKEQISK
     DIEIVKKYFN LI