RIBB_SALG2
ID RIBB_SALG2 Reviewed; 217 AA.
AC B5REF3;
DT 24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT 04-NOV-2008, sequence version 1.
DT 03-AUG-2022, entry version 73.
DE RecName: Full=3,4-dihydroxy-2-butanone 4-phosphate synthase {ECO:0000255|HAMAP-Rule:MF_00180};
DE Short=DHBP synthase {ECO:0000255|HAMAP-Rule:MF_00180};
DE EC=4.1.99.12 {ECO:0000255|HAMAP-Rule:MF_00180};
GN Name=ribB {ECO:0000255|HAMAP-Rule:MF_00180}; OrderedLocusNames=SG3091;
OS Salmonella gallinarum (strain 287/91 / NCTC 13346).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Enterobacteriaceae; Salmonella.
OX NCBI_TaxID=550538;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=287/91 / NCTC 13346;
RX PubMed=18583645; DOI=10.1101/gr.077404.108;
RA Thomson N.R., Clayton D.J., Windhorst D., Vernikos G., Davidson S.,
RA Churcher C., Quail M.A., Stevens M., Jones M.A., Watson M., Barron A.,
RA Layton A., Pickard D., Kingsley R.A., Bignell A., Clark L., Harris B.,
RA Ormond D., Abdellah Z., Brooks K., Cherevach I., Chillingworth T.,
RA Woodward J., Norberczak H., Lord A., Arrowsmith C., Jagels K., Moule S.,
RA Mungall K., Saunders M., Whitehead S., Chabalgoity J.A., Maskell D.,
RA Humphreys T., Roberts M., Barrow P.A., Dougan G., Parkhill J.;
RT "Comparative genome analysis of Salmonella enteritidis PT4 and Salmonella
RT gallinarum 287/91 provides insights into evolutionary and host adaptation
RT pathways.";
RL Genome Res. 18:1624-1637(2008).
CC -!- FUNCTION: Catalyzes the conversion of D-ribulose 5-phosphate to formate
CC and 3,4-dihydroxy-2-butanone 4-phosphate. {ECO:0000255|HAMAP-
CC 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:0000255|HAMAP-Rule:MF_00180};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00180};
CC Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00180};
CC Note=Binds 2 divalent metal cations per subunit. Magnesium or
CC manganese. {ECO:0000255|HAMAP-Rule:MF_00180};
CC -!- PATHWAY: Cofactor biosynthesis; riboflavin biosynthesis; 2-hydroxy-3-
CC oxobutyl phosphate from D-ribulose 5-phosphate: step 1/1.
CC {ECO:0000255|HAMAP-Rule:MF_00180}.
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00180}.
CC -!- SIMILARITY: Belongs to the DHBP synthase family. {ECO:0000255|HAMAP-
CC Rule:MF_00180}.
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DR EMBL; AM933173; CAR38892.1; -; Genomic_DNA.
DR RefSeq; WP_001076978.1; NC_011274.1.
DR AlphaFoldDB; B5REF3; -.
DR SMR; B5REF3; -.
DR EnsemblBacteria; CAR38892; CAR38892; SG3091.
DR KEGG; seg:SG3091; -.
DR HOGENOM; CLU_020273_3_0_6; -.
DR OMA; DAGGLIC; -.
DR UniPathway; UPA00275; UER00399.
DR Proteomes; UP000008321; Chromosome.
DR GO; GO:0008686; F:3,4-dihydroxy-2-butanone-4-phosphate synthase activity; IEA:UniProtKB-UniRule.
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 HAMAP; MF_00180; RibB; 1.
DR InterPro; IPR017945; DHBP_synth_RibB-like_a/b_dom.
DR InterPro; IPR000422; DHBP_synthase_RibB.
DR Pfam; PF00926; DHBP_synthase; 1.
DR SUPFAM; SSF55821; SSF55821; 1.
DR TIGRFAMs; TIGR00506; ribB; 1.
PE 3: Inferred from homology;
KW Lyase; Magnesium; Manganese; Metal-binding; Riboflavin biosynthesis.
FT CHAIN 1..217
FT /note="3,4-dihydroxy-2-butanone 4-phosphate synthase"
FT /id="PRO_1000098286"
FT BINDING 37..38
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT BINDING 38
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT BINDING 38
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT BINDING 42
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT BINDING 150..154
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT BINDING 153
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT BINDING 174
FT /ligand="D-ribulose 5-phosphate"
FT /ligand_id="ChEBI:CHEBI:58121"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT SITE 136
FT /note="Essential for catalytic activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
FT SITE 174
FT /note="Essential for catalytic activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00180"
SQ SEQUENCE 217 AA; 23310 MW; EE07D4C93C3F4EB7 CRC64;
MNQTLLSSFG TPFERVELAL DALREGRGVM VLDDEDRENE GDMIFPAETM TVEQMALTIR
HGSGIVCLCI TEDRRKQLDL PMMVENNTSA YGTGFTVTIE AAEGVTTGVS AADRVTTVRA
AIKDGAKPSD LNRPGHVFPL RAQAGGVLTR GGHTEATIDL MTLAGFKPAG VLCELTNDDG
TMARAPECIA FAGQHNMAVV TIEDLVAYRQ AHERKAS
