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RISA_HAEIN
ID   RISA_HAEIN              Reviewed;         204 AA.
AC   P45273;
DT   01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1995, sequence version 1.
DT   03-AUG-2022, entry version 128.
DE   RecName: Full=Riboflavin synthase;
DE            Short=RS;
DE            EC=2.5.1.9;
GN   Name=ribE; Synonyms=ribC; OrderedLocusNames=HI_1613;
OS   Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Haemophilus.
OX   NCBI_TaxID=71421;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 51907 / DSM 11121 / KW20 / Rd;
RX   PubMed=7542800; DOI=10.1126/science.7542800;
RA   Fleischmann R.D., Adams M.D., White O., Clayton R.A., Kirkness E.F.,
RA   Kerlavage A.R., Bult C.J., Tomb J.-F., Dougherty B.A., Merrick J.M.,
RA   McKenney K., Sutton G.G., FitzHugh W., Fields C.A., Gocayne J.D.,
RA   Scott J.D., Shirley R., Liu L.-I., Glodek A., Kelley J.M., Weidman J.F.,
RA   Phillips C.A., Spriggs T., Hedblom E., Cotton M.D., Utterback T.R.,
RA   Hanna M.C., Nguyen D.T., Saudek D.M., Brandon R.C., Fine L.D.,
RA   Fritchman J.L., Fuhrmann J.L., Geoghagen N.S.M., Gnehm C.L., McDonald L.A.,
RA   Small K.V., Fraser C.M., Smith H.O., Venter J.C.;
RT   "Whole-genome random sequencing and assembly of Haemophilus influenzae
RT   Rd.";
RL   Science 269:496-512(1995).
CC   -!- FUNCTION: Catalyzes the dismutation of two molecules of 6,7-dimethyl-8-
CC       ribityllumazine, resulting in the formation of riboflavin and 5-amino-
CC       6-(D-ribitylamino)uracil. {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 6,7-dimethyl-8-(1-D-ribityl)lumazine + H(+) = 5-amino-6-(D-
CC         ribitylamino)uracil + riboflavin; Xref=Rhea:RHEA:20772,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:15934, ChEBI:CHEBI:57986,
CC         ChEBI:CHEBI:58201; EC=2.5.1.9;
CC   -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; riboflavin
CC       from 2-hydroxy-3-oxobutyl phosphate and 5-amino-6-(D-
CC       ribitylamino)uracil: step 2/2.
CC   -!- SUBUNIT: Homotrimer. {ECO:0000250}.
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DR   EMBL; L42023; AAC23257.1; -; Genomic_DNA.
DR   PIR; E64132; E64132.
DR   RefSeq; NP_439755.1; NC_000907.1.
DR   RefSeq; WP_005693624.1; NC_000907.1.
DR   AlphaFoldDB; P45273; -.
DR   SMR; P45273; -.
DR   STRING; 71421.HI_1613; -.
DR   EnsemblBacteria; AAC23257; AAC23257; HI_1613.
DR   KEGG; hin:HI_1613; -.
DR   PATRIC; fig|71421.8.peg.1686; -.
DR   eggNOG; COG0307; Bacteria.
DR   HOGENOM; CLU_034388_0_1_6; -.
DR   OMA; HILSGHV; -.
DR   PhylomeDB; P45273; -.
DR   BioCyc; HINF71421:G1GJ1-1626-MON; -.
DR   UniPathway; UPA00275; UER00405.
DR   Proteomes; UP000000579; Chromosome.
DR   GO; GO:0005829; C:cytosol; IBA:GO_Central.
DR   GO; GO:0004746; F:riboflavin synthase activity; IBA:GO_Central.
DR   GO; GO:0009231; P:riboflavin biosynthetic process; IBA:GO_Central.
DR   CDD; cd00402; Riboflavin_synthase_like; 1.
DR   Gene3D; 2.40.30.20; -; 2.
DR   InterPro; IPR023366; ATP_synth_asu-like_sf.
DR   InterPro; IPR001783; Lumazine-bd.
DR   InterPro; IPR026017; Lumazine-bd_dom.
DR   InterPro; IPR017938; Riboflavin_synthase-like_b-brl.
DR   PANTHER; PTHR21098; PTHR21098; 1.
DR   Pfam; PF00677; Lum_binding; 2.
DR   PIRSF; PIRSF000498; Riboflavin_syn_A; 1.
DR   SUPFAM; SSF63380; SSF63380; 2.
DR   TIGRFAMs; TIGR00187; ribE; 1.
DR   PROSITE; PS51177; LUMAZINE_BIND; 2.
PE   3: Inferred from homology;
KW   Reference proteome; Repeat; Riboflavin biosynthesis; Transferase.
FT   CHAIN           1..204
FT                   /note="Riboflavin synthase"
FT                   /id="PRO_0000068167"
FT   REPEAT          1..97
FT                   /note="Lumazine-binding 1"
FT   REPEAT          98..195
FT                   /note="Lumazine-binding 2"
FT   BINDING         4..6
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q2YN92"
FT   BINDING         48..50
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="2"
FT                   /ligand_note="ligand shared between two trimeric partners"
FT                   /evidence="ECO:0000250|UniProtKB:Q2YN92"
FT   BINDING         62..67
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="2"
FT                   /ligand_note="ligand shared between two trimeric partners"
FT                   /evidence="ECO:0000250|UniProtKB:P0AFU8"
FT   BINDING         101..103
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="2"
FT                   /ligand_note="ligand shared between two trimeric partners"
FT                   /evidence="ECO:0000250|UniProtKB:Q2YN92"
FT   BINDING         137
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="2"
FT                   /ligand_note="ligand shared between two trimeric partners"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000250|UniProtKB:Q2YN92"
FT   BINDING         146..148
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q2YN92"
FT   BINDING         160..165
FT                   /ligand="2,4-dihydroxypteridine"
FT                   /ligand_id="ChEBI:CHEBI:16489"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:Q2YN92"
SQ   SEQUENCE   204 AA;  22590 MW;  B7C2172F88BC1DA4 CRC64;
     MFTGIVQGTA PIHSIKEKAN FRTQVVKLLP EMRKDLEIGA SIANNGVCLT VTEINGDLVS
     FDLMQETLKI TNLGTVKVGD YVNIERAMQM GTEIGGHLLS GHIYCTAKIS DIIASENNRQ
     IWFELPSADV MKYILTKGFV AVDGISLTIG EVRDTQFCVN LIPETLQRTL MGRRKVGDIV
     NIEIDPQTQA IVDTVENYLQ SKNF
 
 
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