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RIFK_IGNH4
ID   RIFK_IGNH4              Reviewed;         179 AA.
AC   A8A9X7;
DT   26-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   23-OCT-2007, sequence version 1.
DT   03-AUG-2022, entry version 73.
DE   RecName: Full=Riboflavin kinase {ECO:0000255|HAMAP-Rule:MF_01285};
DE            Short=RFK {ECO:0000255|HAMAP-Rule:MF_01285};
DE            EC=2.7.1.161 {ECO:0000255|HAMAP-Rule:MF_01285};
DE   AltName: Full=CTP-dependent riboflavin kinase {ECO:0000255|HAMAP-Rule:MF_01285};
DE   AltName: Full=CTP:riboflavin 5'-phosphotransferase {ECO:0000255|HAMAP-Rule:MF_01285};
DE   AltName: Full=Flavokinase {ECO:0000255|HAMAP-Rule:MF_01285};
GN   Name=ribK {ECO:0000255|HAMAP-Rule:MF_01285}; OrderedLocusNames=Igni_0547;
OS   Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125).
OC   Archaea; Crenarchaeota; Thermoprotei; Desulfurococcales;
OC   Desulfurococcaceae; Ignicoccus.
OX   NCBI_TaxID=453591;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=KIN4/I / DSM 18386 / JCM 14125;
RX   PubMed=19000309; DOI=10.1186/gb-2008-9-11-r158;
RA   Podar M., Anderson I., Makarova K.S., Elkins J.G., Ivanova N., Wall M.A.,
RA   Lykidis A., Mavromatis K., Sun H., Hudson M.E., Chen W., Deciu C.,
RA   Hutchison D., Eads J.R., Anderson A., Fernandes F., Szeto E., Lapidus A.,
RA   Kyrpides N.C., Saier M.H. Jr., Richardson P.M., Rachel R., Huber H.,
RA   Eisen J.A., Koonin E.V., Keller M., Stetter K.O.;
RT   "A genomic analysis of the archaeal system Ignicoccus hospitalis-
RT   Nanoarchaeum equitans.";
RL   Genome Biol. 9:R158.1-R158.18(2008).
CC   -!- FUNCTION: Catalyzes the CTP-dependent phosphorylation of riboflavin
CC       (vitamin B2) to form flavin mononucleotide (FMN). {ECO:0000255|HAMAP-
CC       Rule:MF_01285}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=CTP + riboflavin = CDP + FMN + H(+); Xref=Rhea:RHEA:25021,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:37563, ChEBI:CHEBI:57986,
CC         ChEBI:CHEBI:58069, ChEBI:CHEBI:58210; EC=2.7.1.161;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01285};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01285};
CC       Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01285};
CC   -!- PATHWAY: Cofactor biosynthesis; FMN biosynthesis; FMN from riboflavin
CC       (CTP route): step 1/1. {ECO:0000255|HAMAP-Rule:MF_01285}.
CC   -!- SIMILARITY: Belongs to the archaeal riboflavin kinase family.
CC       {ECO:0000255|HAMAP-Rule:MF_01285}.
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DR   EMBL; CP000816; ABU81729.1; -; Genomic_DNA.
DR   RefSeq; WP_011998581.1; NC_009776.1.
DR   AlphaFoldDB; A8A9X7; -.
DR   SMR; A8A9X7; -.
DR   STRING; 453591.Igni_0547; -.
DR   PRIDE; A8A9X7; -.
DR   EnsemblBacteria; ABU81729; ABU81729; Igni_0547.
DR   GeneID; 5562129; -.
DR   KEGG; iho:Igni_0547; -.
DR   eggNOG; arCOG01904; Archaea.
DR   HOGENOM; CLU_088476_0_0_2; -.
DR   OMA; PYEGTLN; -.
DR   OrthoDB; 91297at2157; -.
DR   PhylomeDB; A8A9X7; -.
DR   UniPathway; UPA00276; UER00929.
DR   Proteomes; UP000000262; Chromosome.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0008531; F:riboflavin kinase activity; IEA:InterPro.
DR   GO; GO:0009398; P:FMN biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   GO; GO:0009231; P:riboflavin biosynthetic process; IEA:InterPro.
DR   Gene3D; 2.40.30.30; -; 1.
DR   HAMAP; MF_01285; Riboflavin_kinase; 1.
DR   InterPro; IPR039063; RibK_CTP-dep.
DR   InterPro; IPR023470; Riboflavin_kinase_archaeal.
DR   InterPro; IPR023602; Riboflavin_kinase_CTP-dep.
DR   InterPro; IPR023465; Riboflavin_kinase_dom_sf.
DR   PANTHER; PTHR40706; PTHR40706; 1.
DR   Pfam; PF01982; CTP-dep_RFKase; 1.
DR   SUPFAM; SSF82114; SSF82114; 1.
PE   3: Inferred from homology;
KW   Flavoprotein; FMN; Kinase; Magnesium; Metal-binding; Nucleotide-binding;
KW   Reference proteome; Transferase.
FT   CHAIN           1..179
FT                   /note="Riboflavin kinase"
FT                   /id="PRO_0000322067"
FT   BINDING         61..66
FT                   /ligand="CDP"
FT                   /ligand_id="ChEBI:CHEBI:58069"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01285"
FT   BINDING         90
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01285"
FT   BINDING         92
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01285"
FT   BINDING         147
FT                   /ligand="FMN"
FT                   /ligand_id="ChEBI:CHEBI:58210"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01285"
FT   BINDING         155
FT                   /ligand="FMN"
FT                   /ligand_id="ChEBI:CHEBI:58210"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01285"
FT   BINDING         160..163
FT                   /ligand="CDP"
FT                   /ligand_id="ChEBI:CHEBI:58069"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01285"
SQ   SEQUENCE   179 AA;  20113 MW;  FDD41DD0E46F0E6B CRC64;
     MLAALYYVLK GDPYKALKED LESLKKAKLL TEDLRITEKG MELIQQLISK PISLKGKVVS
     GDGEGRYYLS LEGYRRQVRE KLGFDPFPGT LNVLLDPTST EKKSTLMFKR PIILKGFTEN
     GKRYGEVLAF PARVSGVEAA LVIPLKTHHP PEIIELISPV ELRKALKLKD GDEVEVLVY
 
 
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