ID F8KTE8_HELBC Unreviewed; 343 AA.
AC F8KTE8;
DT 21-SEP-2011, integrated into UniProtKB/TrEMBL.
DT 21-SEP-2011, sequence version 1.
DT 27-MAR-2024, entry version 67.
DE RecName: Full=3,4-dihydroxy-2-butanone 4-phosphate synthase {ECO:0000256|ARBA:ARBA00018836, ECO:0000256|HAMAP-Rule:MF_00180};
DE Short=DHBP synthase {ECO:0000256|HAMAP-Rule:MF_00180};
DE EC=4.1.99.12 {ECO:0000256|ARBA:ARBA00012153, ECO:0000256|HAMAP-Rule:MF_00180};
GN Name=ribB {ECO:0000256|HAMAP-Rule:MF_00180};
GN OrderedLocusNames=HBZC1_11130 {ECO:0000313|EMBL:CCB80099.1};
OS Helicobacter bizzozeronii (strain CIII-1).
OC Bacteria; Campylobacterota; Epsilonproteobacteria; Campylobacterales;
OC Helicobacteraceae; Helicobacter.
OX NCBI_TaxID=1002804 {ECO:0000313|EMBL:CCB80099.1, ECO:0000313|Proteomes:UP000008387};
RN [1] {ECO:0000313|EMBL:CCB80099.1, ECO:0000313|Proteomes:UP000008387}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CIII-1 {ECO:0000313|EMBL:CCB80099.1,
RC ECO:0000313|Proteomes:UP000008387};
RX PubMed=21705603; DOI=10.1128/JB.05439-11;
RA Schott T., Rossi M., Hanninen M.L.;
RT "Genome sequence of Helicobacter bizzozeronii strain CIII-1, an isolate
RT from human gastric mucosa.";
RL J. Bacteriol. 193:4565-4566(2011).
CC -!- FUNCTION: Catalyzes the conversion of D-ribulose 5-phosphate to formate
CC and 3,4-dihydroxy-2-butanone 4-phosphate.
CC {ECO:0000256|ARBA:ARBA00002284, ECO:0000256|HAMAP-Rule:MF_00180}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=D-ribulose 5-phosphate = (2S)-2-hydroxy-3-oxobutyl phosphate +
CC formate + H(+); Xref=Rhea:RHEA:18457, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:15740, ChEBI:CHEBI:58121, ChEBI:CHEBI:58830;
CC EC=4.1.99.12; Evidence={ECO:0000256|ARBA:ARBA00000141,
CC ECO:0000256|HAMAP-Rule:MF_00180};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00180};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00180};
CC Note=Binds 2 divalent metal cations per subunit. Magnesium or
CC manganese. {ECO:0000256|HAMAP-Rule:MF_00180};
CC -!- COFACTOR:
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000256|ARBA:ARBA00001936};
CC -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; 2-hydroxy-3-
CC oxobutyl phosphate from D-ribulose 5-phosphate: step 1/1.
CC {ECO:0000256|ARBA:ARBA00004904, ECO:0000256|HAMAP-Rule:MF_00180}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_00180}.
CC -!- SIMILARITY: Belongs to the DHBP synthase family. {ECO:0000256|HAMAP-
CC Rule:MF_00180}.
CC -!- SIMILARITY: In the C-terminal section; belongs to the GTP
CC cyclohydrolase II family. {ECO:0000256|ARBA:ARBA00008976}.
CC -!- SIMILARITY: In the N-terminal section; belongs to the DHBP synthase
CC family. {ECO:0000256|ARBA:ARBA00005520}.
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DR EMBL; FR871757; CCB80099.1; -; Genomic_DNA.
DR RefSeq; WP_013890529.1; NC_015674.1.
DR AlphaFoldDB; F8KTE8; -.
DR STRING; 1002804.HBZC1_11130; -.
DR KEGG; hbi:HBZC1_11130; -.
DR eggNOG; COG0108; Bacteria.
DR HOGENOM; CLU_020273_1_2_7; -.
DR UniPathway; UPA00275; UER00399.
DR Proteomes; UP000008387; Chromosome.
DR GO; GO:0008686; F:3,4-dihydroxy-2-butanone-4-phosphate synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0016787; F:hydrolase activity; IEA:UniProtKB-KW.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0030145; F:manganese ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0009231; P:riboflavin biosynthetic process; IEA:UniProtKB-UniRule.
DR Gene3D; 3.90.870.10; DHBP synthase; 1.
DR Gene3D; 3.40.50.10990; GTP cyclohydrolase II; 1.
DR HAMAP; MF_00180; RibB; 1.
DR InterPro; IPR017945; DHBP_synth_RibB-like_a/b_dom.
DR InterPro; IPR000422; DHBP_synthase_RibB.
DR InterPro; IPR032677; GTP_cyclohydro_II.
DR InterPro; IPR036144; RibA-like_sf.
DR NCBIfam; TIGR00506; ribB; 1.
DR PANTHER; PTHR21327; GTP CYCLOHYDROLASE II-RELATED; 1.
DR PANTHER; PTHR21327:SF48; RIBOFLAVIN BIOSYNTHESIS PROTEIN RIBBA; 1.
DR Pfam; PF00926; DHBP_synthase; 1.
DR Pfam; PF00925; GTP_cyclohydro2; 1.
DR PIRSF; PIRSF001259; RibA; 2.
DR SUPFAM; SSF142695; RibA-like; 1.
DR SUPFAM; SSF55821; YrdC/RibB; 1.
PE 3: Inferred from homology;
KW Hydrolase {ECO:0000313|EMBL:CCB80099.1};
KW Lyase {ECO:0000256|HAMAP-Rule:MF_00180};
KW Magnesium {ECO:0000256|HAMAP-Rule:MF_00180};
KW Manganese {ECO:0000256|HAMAP-Rule:MF_00180};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_00180}; Reference proteome {ECO:0000313|Proteomes:UP000008387};
KW Riboflavin biosynthesis {ECO:0000256|ARBA:ARBA00022619, ECO:0000256|HAMAP-
KW Rule:MF_00180}.
FT DOMAIN 294..341
FT /note="GTP cyclohydrolase II"
FT /evidence="ECO:0000259|Pfam:PF00925"
FT BINDING 28..29
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT BINDING 29
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT BINDING 29
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT BINDING 33
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT BINDING 140..144
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT BINDING 143
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT SITE 126
FT /note="Essential for catalytic activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
FT SITE 164
FT /note="Essential for catalytic activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00180"
SQ SEQUENCE 343 AA; 38715 MW; 4526F8E719A8A4EA CRC64;
MDNLERMEQA LWAIKNGELI ILMDDEDREN EGDLVMAGIF STPDKINFMA KHARGLICVS
LTQEIANKFD LKPMVSHNDS KHETAFTVSI DARVAKTGIS AYERSLTIEL LCKEHTSAQD
FVRPGHIFPL IAKDEGVLVR TGHTEASVDL CKLAGLKPIS VICEIMKEDG SMAKRGDKFL
LDFAKTHGLK TLYVSDIVSY RLQSENLLKI VSQEPTQFLG HACTHFIFED HLHRKHYAYQ
FMGDLARPLV RFHIIKSDYE LLSQGDQYRF LMDALQKLSA EGGFLIFIDP QAKTYDTLKN
FGIGALILKS LGVKSFRLLT SQDNPEHTAL RGFDLEMLEA IHP
//
