RISA_PHOLE
ID RISA_PHOLE Reviewed; 218 AA.
AC Q01993;
DT 01-JUL-1993, integrated into UniProtKB/Swiss-Prot.
DT 01-JUL-1993, sequence version 1.
DT 03-AUG-2022, entry version 89.
DE RecName: Full=Riboflavin synthase;
DE Short=RS;
DE EC=2.5.1.9;
GN Name=ribE; Synonyms=ribB;
OS Photobacterium leiognathi.
OC Bacteria; Proteobacteria; Gammaproteobacteria; Vibrionales; Vibrionaceae;
OC Photobacterium.
OX NCBI_TaxID=553611;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC 25521 / DSM 21260 / CIP 66.5 / NCIMB 2193 / L1;
RX PubMed=1339274; DOI=10.1016/0006-291x(92)90802-r;
RA Lee C.Y., Meighen E.A.;
RT "The lux genes in Photobacterium leiognathi are closely linked with genes
RT corresponding in sequence to riboflavin synthesis genes.";
RL Biochem. Biophys. Res. Commun. 186:690-697(1992).
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; M90094; AAA73228.1; -; Genomic_DNA.
DR PIR; JC1187; JC1187.
DR AlphaFoldDB; Q01993; -.
DR SMR; Q01993; -.
DR UniPathway; UPA00275; UER00405.
DR GO; GO:0004746; F:riboflavin synthase activity; IEA:UniProtKB-EC.
DR GO; GO:0009231; P:riboflavin biosynthetic process; IEA:UniProtKB-UniPathway.
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 Repeat; Riboflavin biosynthesis; Transferase.
FT CHAIN 1..218
FT /note="Riboflavin synthase"
FT /id="PRO_0000068170"
FT REPEAT 1..97
FT /note="Lumazine-binding 1"
FT REPEAT 98..194
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 136
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 145..147
FT /ligand="2,4-dihydroxypteridine"
FT /ligand_id="ChEBI:CHEBI:16489"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:Q2YN92"
FT BINDING 159..164
FT /ligand="2,4-dihydroxypteridine"
FT /ligand_id="ChEBI:CHEBI:16489"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:Q2YN92"
SQ SEQUENCE 218 AA; 24095 MW; DD0F8996FCC6173E CRC64;
MFTGIIESIG NIGAIIRHNE DLSIVVNTNN LDISDVNIGD SIATNGVCLT VSKLLPSGYT
ADLSLETYKR TAFHSYRIGQ EVNLEKAMLP TTRLGGHLVS GHVDGVGEVI EFKRNGRAIN
IWVAVPVQLK KYLSEKGSVT IDGISLTINA VYQNVIKLTI VPHTLAETNL VNINIDKKVN
VEIDMMARYL EKLIKVDRYE SEKTSNVSMD LERYGFIS
